Camaro, Firebird, 1999 - 2002

3.8L V6 VIN K Std

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3.8L V6 VIN K Std

Trouble Code: P0101

MAF Sensor Signal Range/Performance

Trouble Code Conditions: DTC P0102-P0103, P0107-P0108, P0401-P0405, P0440-P0449, P0606, P1106-1107, P1404, P1441, P1514-P1517 not set, and P1120, P1220 not set as a combination, and P1518 not set in combination with any of these codes: P1120, P1125, P1220, P1221, P1271-P1276 and

Possible Causes:



Base engine vacuum leak, PCV valve leaking or stuck open
 
Engine oil dipstick missing or not fully seated
 
MAF sensor element (wire) is contaminated or it has failed
 
MAF sensor signal circuit or ground circuit has high resistance
 
PCM has failed
 

Trouble Code: P0101

MAF Sensor Signal Range/Performance

Trouble Code Conditions: DTC P0102-P0103, P0107-P0108, P0401-P0405, P0440-P0449, P0606, P1106-1107, P1404, P1441, P1514-P1517 not set, and P1120, P1220 not set as a combination, and P1518 not set in combination with any of these codes: P1120, P1125, P1220, P1221, P1271-P1276 and

Possible Causes:



Base engine vacuum leak, PCV valve leaking or stuck open
 
Engine oil dipstick missing or not fully seated
 
MAF sensor element (wire) is contaminated or it has failed
 
MAF sensor signal circuit or ground circuit has high resistance
 
PCM has failed
 

Trouble Code: P0102

MAF Sensor Circuit Low Frequency

Trouble Code Conditions: Engine cranking or running for 500 ms, system voltage over 8v, and the PCM detected the MAF sensor was less than 1,200 Hz for 12 seconds. This sensor measures how much air enters the engine.

Possible Causes:



MAF sensor element hot wire contaminated or the sensor failed
 
MAF sensor signal shorted to ground or ground circuit problem
 
MAF sensor wiring routed close to the ignition wires, generator, solenoids or electric motors (this causes it to pick up EMI/RFI)
 

Trouble Code: P0102

MAF Sensor Circuit Low Frequency

Trouble Code Conditions: Engine cranking or running for 500 ms, system voltage over 8v, and the PCM detected the MAF sensor was less than 1,200 Hz for 12 seconds. This sensor measures how much air enters the engine.

Possible Causes:



MAF sensor element hot wire contaminated or the sensor failed
 
MAF sensor signal shorted to ground or ground circuit problem
 
MAF sensor wiring routed close to the ignition wires, generator, solenoids or electric motors (this causes it to pick up EMI/RFI)
 

Trouble Code: P0103

MAF Sensor Circuit High Frequency

Trouble Code Conditions: Engine runtime over 3 seconds, engine speed more than 300 rpm, system voltage over 8v, and the PCM detected the MAF sensor frequency was more than 11,500 Hz for over 12 seconds. The range of this sensor is 2000 (idle) to 10000 Hz (high load).

Possible Causes:



MAF sensor power circuit has a high resistance condition
 
MAF sensor is contaminated, dirty or it has failed
 
MAF sensor wiring routed too close to the Generator or to close to ignition wires (this causes a EMI/REFI high frequency signal)
 
Water enters th
 

Trouble Code: P0103

MAF Sensor Circuit High Frequency

Trouble Code Conditions: Engine runtime over 3 seconds, engine speed more than 300 rpm, system voltage over 8v, and the PCM detected the MAF sensor frequency was more than 11,500 Hz for over 12 seconds. The range of this sensor is 2000 (idle) to 10000 Hz (high load).

Possible Causes:



MAF sensor power circuit has a high resistance condition
 
MAF sensor is contaminated, dirty or it has failed
 
MAF sensor wiring routed too close to the Generator or to close to ignition wires (this causes a EMI/REFI high frequency signal)
 
Water enters th
 

Trouble Code: P0106

MAP Sensor Signal Range/Performance

Trouble Code Conditions: Engine started A/C Clutch, Brake and Clutch switch status, EGR flow rate, engine speed, throttle angle and IAC counts all steady, and the PCM detected the MAP sensor changed too much without a corresponding change in engine load during 200 3X REF periods.

Possible Causes:



MAP sensor seal is missing or damage, intake manifold leaks
 
MAP sensor is contaminated, dirty, skewed or has failed
 
MAP sensor vacuum line is loose, restricted or contains "ice"
 
PCM has failed
 

Trouble Code: P0106

MAP Sensor Signal Range/Performance

Trouble Code Conditions: Engine started A/C Clutch, Brake and Clutch switch status, EGR flow rate, engine speed, throttle angle and IAC counts all steady, and the PCM detected the MAP sensor changed too much without a corresponding change in engine load during 200 3X REF periods.

Possible Causes:



MAP sensor seal is missing or damage, intake manifold leaks
 
MAP sensor is contaminated, dirty, skewed or has failed
 
MAP sensor vacuum line is loose, restricted or contains "ice"
 
PCM has failed
 

Trouble Code: P0107

MAP Sensor Circuit Low Input

Trouble Code Conditions: DTC P0606, P1120, P1125, P1220-P1221, P1271-P1276, P1280-P1286 and P1514-P1518 not set, TP angle at 0% with the engine speed under 1000 rpm or over 10% with the engine speed over 1000 rpm, and the PCM detected the MAP sensor was under 0.1v for 7 seconds.

Possible Causes:



MAP sensor signal circuit shorted to sensor or chassis ground
 
MAP sensor power circuit open between the sensor and PCM
 
MAP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0107

MAP Sensor Circuit Low Input

Trouble Code Conditions: DTC P0606, P1120, P1125, P1220-P1221, P1271-P1276, P1280-P1286 and P1514-P1518 not set, TP angle at 0% with the engine speed under 1000 rpm or over 10% with the engine speed over 1000 rpm, and the PCM detected the MAP sensor was under 0.1v for 7 seconds.

Possible Causes:



MAP sensor signal circuit shorted to sensor or chassis ground
 
MAP sensor power circuit open between the sensor and PCM
 
MAP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0108

MAP Sensor Circuit High Input

Trouble Code Conditions: DTC P0606, P1120, P1125, P1220, P1221, P1271-P1276, P1280-P1286 and P1514-P1517 not set, engine runtime 2 minutes with startup ECT input below -22ºF to 1 second over 86ºF, TP angle under 0.5% with engine speed under 900 rpm, and PCM detected the MAP senso

Possible Causes:



MAP sensor signal circuit is open or it is shorted to VREF
 
MAP sensor ground circuit open between sensor and the PCM
 
MAP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0108

MAP Sensor Circuit High Input

Trouble Code Conditions: DTC P0606, P1120, P1125, P1220, P1221, P1271-P1276, P1280-P1286 and P1514-P1517 not set, engine runtime 2 minutes with startup ECT input below -22ºF to 1 second over 86ºF, TP angle under 0.5% with engine speed under 900 rpm, and PCM detected the MAP senso

Possible Causes:



MAP sensor signal circuit is open or it is shorted to VREF
 
MAP sensor ground circuit open between sensor and the PCM
 
MAP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0112

IAT Sensor Circuit Low Input

Trouble Code Conditions: DTC P0101, P0102, P0103, P0116, P0117, P0118, P0125, P0128, P0500, P0502 and P0503 not set, engine started, engine runtime from 10-45 seconds, VSS more than 25 mph, and the PCM detected the IAT sensor was from 253-282ºF for 3-5 seconds in the CCM test.

Possible Causes:



IAT sensor signal circuit is shorted to sensor or chassis ground
 
IAT sensor is damaged or has failed (it may be shorted)
 
PCM has failed
 

Trouble Code: P0112

IAT Sensor Circuit Low Input

Trouble Code Conditions: DTC P0101, P0102, P0103, P0116, P0117, P0118, P0125, P0128, P0500, P0502 and P0503 not set, engine started, engine runtime from 10-45 seconds, VSS more than 25 mph, and the PCM detected the IAT sensor was from 253-282ºF for 3-5 seconds in the CCM test.

Possible Causes:



IAT sensor signal circuit is shorted to sensor or chassis ground
 
IAT sensor is damaged or has failed (it may be shorted)
 
PCM has failed
 

Trouble Code: P0113

IAT Sensor Circuit High Input

Trouble Code Conditions: DTC P0101, P0102, P0103, P0116, P0117, P0118, P0125, P0128, P0500, P0502 and P0503 not set, engine started, engine runtime over 3 minutes, MAF sensor less than 8-15 g/sec, VSS less than 5-7 mph, ECT sensor more than 140ºF, and the PCM detected the IAT sen

Possible Causes:



IAT sensor signal circuit is open between the sensor and PCM
 
IAT sensor signal circuit is shorted to VREF or system power
 
IAT sensor is damaged or has failed (it may be open)
 
PCM has failed
 

Trouble Code: P0113

IAT Sensor Circuit High Input

Trouble Code Conditions: DTC P0101, P0102, P0103, P0116, P0117, P0118, P0125, P0128, P0500, P0502 and P0503 not set, engine started, engine runtime over 3 minutes, MAF sensor less than 8-15 g/sec, VSS less than 5-7 mph, ECT sensor more than 140ºF, and the PCM detected the IAT sen

Possible Causes:



IAT sensor signal circuit is open between the sensor and PCM
 
IAT sensor signal circuit is shorted to VREF or system power
 
IAT sensor is damaged or has failed (it may be open)
 
PCM has failed
 

Trouble Code: P0116

ECT Sensor Signal Range/Performance

Trouble Code Conditions: DTC P0112, P0113, P0117, P0118, P0125, P0128, P0601, P0602, P1621 or P1683 not set, minimum soak time of 8 hours, key on, the difference between the ECT and IAT sensor over 27-36ºF, engine started, VSS over 15 mph for 5 minutes. If the IAT sensor decrease

Possible Causes:



ECT sensor circuit has an intermittent high resistance condition
 
ECT sensor circuit has an intermittent grounded condition
 
ECT sensor is out of calibration or "skewed"
 

Trouble Code: P0116

ECT Sensor Signal Range/Performance

Trouble Code Conditions: DTC P0112, P0113, P0117, P0118, P0125, P0128, P0601, P0602, P1621 or P1683 not set, minimum soak time of 8 hours, key on, the difference between the ECT and IAT sensor over 27-36ºF, engine started, VSS over 15 mph for 5 minutes. If the IAT sensor decrease

Possible Causes:



ECT sensor circuit has an intermittent high resistance condition
 
ECT sensor circuit has an intermittent grounded condition
 
ECT sensor is out of calibration or "skewed"
 

Trouble Code: P0117

ECT Sensor Circuit Low Input

Trouble Code Conditions: Engine started; engine runtime under 10 seconds (or more than 10 seconds if the ECT sensor is less than 122ºF at startup), and the PCM detected the ECT sensor was more than 282ºF for 20 seconds.

Possible Causes:



ECT sensor connector is damaged or shorted
 
ECT sensor signal circuit shorted to sensor or chassis ground
 
ECT sensor is damaged or has failed (it may be shorted)
 
PCM has failed
 

Trouble Code: P0117

ECT Sensor Circuit Low Input

Trouble Code Conditions: Engine started; engine runtime under 10 seconds (or more than 10 seconds if the ECT sensor is less than 122ºF at startup), and the PCM detected the ECT sensor was more than 282ºF for 20 seconds.

Possible Causes:



ECT sensor connector is damaged or shorted
 
ECT sensor signal circuit shorted to sensor or chassis ground
 
ECT sensor is damaged or has failed (it may be shorted)
 
PCM has failed
 

Trouble Code: P0118

ECT Sensor Circuit High Input

Trouble Code Conditions: Engine runtime 15-60 seconds (or less than 60 seconds with the ECT sensor more than 32ºF at startup), and the PCM detected the ECT sensor indicated less than -36ºF for 20 seconds.

Possible Causes:



ECT sensor connector is damaged, loose or open
 
ECT sensor signal circuit is open between the sensor and PCM
 
ECT sensor signal circuit is shorted to VREF or system power
 
ECT sensor is damaged or has failed (it may be open)
 
PCM has failed
 

Trouble Code: P0118

ECT Sensor Circuit High Input

Trouble Code Conditions: Engine runtime 15-60 seconds (or less than 60 seconds with the ECT sensor more than 32ºF at startup), and the PCM detected the ECT sensor indicated less than -36ºF for 20 seconds.

Possible Causes:



ECT sensor connector is damaged, loose or open
 
ECT sensor signal circuit is open between the sensor and PCM
 
ECT sensor signal circuit is shorted to VREF or system power
 
ECT sensor is damaged or has failed (it may be open)
 
PCM has failed
 

Trouble Code: P0121

TP Sensor Circuit Insufficient Activity

Trouble Code Conditions: DTC P0107, P0108, P0122, P0123, P1122P and 1123 not set, engine started, engine runtime over 2 minutes, ECT sensor more than 158ºF, MAP sensor less than 40 kPa, or with the MAP more than 67 kPa and steady, and the PCM detected the predicted TP angle did n

Possible Causes:



TP sensor signal circuit open or shorted to ground (intermittent)
 
TP sensor VREF circuit is open or shorted (intermittent fault)
 
TP sensor is damaged or it failed (may be cracked or sticking)
 

Trouble Code: P0121

TP Sensor Circuit Insufficient Activity

Trouble Code Conditions: DTC P0107, P0108, P0122, P0123, P1122P and 1123 not set, engine started, engine runtime over 2 minutes, ECT sensor more than 158ºF, MAP sensor less than 40 kPa, or with the MAP more than 67 kPa and steady, and the PCM detected the predicted TP angle did n

Possible Causes:



TP sensor signal circuit open or shorted to ground (intermittent)
 
TP sensor VREF circuit is open or shorted (intermittent fault)
 
TP sensor is damaged or it failed (may be cracked or sticking)
 

Trouble Code: P0122

TP Sensor Circuit Low Input

Trouble Code Conditions: Key on or engine running; and the PCM detected the TP sensor signal was less than 0.20v for 10 seconds. The PCM uses the TP sensor signal to determine the throttle plate angle for various engine controls. The TP sensor is a potentiometer type sensor with

Possible Causes:



TP sensor signal circuit is shorted to sensor ground
 
TP sensor signal circuit is open (except 1996-1998 models)
 
TP sensor VREF circuit is open between sensor and PCM
 
TP sensor is damaged or it failed (it may be shorted)
 
PCM is damaged or has failed
 

Trouble Code: P0122

TP Sensor Circuit Low Input

Trouble Code Conditions: Key on or engine running; and the PCM detected the TP sensor signal was less than 0.20v for 10 seconds. The PCM uses the TP sensor signal to determine the throttle plate angle for various engine controls. The TP sensor is a potentiometer type sensor with

Possible Causes:



TP sensor signal circuit is shorted to sensor ground
 
TP sensor signal circuit is open (except 1996-1998 models)
 
TP sensor VREF circuit is open between sensor and PCM
 
TP sensor is damaged or it failed (it may be shorted)
 
PCM is damaged or has failed
 

Trouble Code: P0123

TP Sensor Circuit High Input

Trouble Code Conditions: Key on or engine running; and the PCM detected the TP sensor was more than 4.75v for 10 seconds. The TP sensor is a potentiometer with reference, ground circuit and signal circuit.

Possible Causes:



TP sensor signal circuit is shorted to VREF or system power
 
TP sensor ground circuit is open between the sensor and PCM
 
TP sensor is damaged or it failed (it may be open)
 
PCM is damaged or has failed
 

Trouble Code: P0123

TP Sensor Circuit High Input

Trouble Code Conditions: Key on or engine running; and the PCM detected the TP sensor was more than 4.75v for 10 seconds. The TP sensor is a potentiometer with reference, ground circuit and signal circuit.

Possible Causes:



TP sensor signal circuit is shorted to VREF or system power
 
TP sensor ground circuit is open between the sensor and PCM
 
TP sensor is damaged or it failed (it may be open)
 
PCM is damaged or has failed
 

Trouble Code: P0125

ECT Excessive Time To Enter Closed Loop

Trouble Code Conditions: DTC P0110-P0113, P0116-P0118, P0128, P1114 and P1115 not set, engine started, minimum IAT sensor more than 19ºF, ECT sensor from -40ºF to 104ºF at startup, and the PCM detected the engine runtime exceeded 5 minutes before the ECT exceeded 41ºF after a cal

Possible Causes:



Check the operation of the thermostat (it may be stuck open)
 
Coolant level is too low, or the coolant mixture is incorrect
 
ECT sensor signal circuit has a high resistance condition
 
ECT sensor is damaged or it has failed
 

Trouble Code: P0125

ECT Excessive Time To Enter Closed Loop

Trouble Code Conditions: DTC P0110-P0113, P0116-P0118, P0128, P1114 and P1115 not set, engine started, minimum IAT sensor more than 19ºF, ECT sensor from -40ºF to 104ºF at startup, and the PCM detected the engine runtime exceeded 5 minutes before the ECT exceeded 41ºF after a cal

Possible Causes:



Check the operation of the thermostat (it may be stuck open)
 
Coolant level is too low, or the coolant mixture is incorrect
 
ECT sensor signal circuit has a high resistance condition
 
ECT sensor is damaged or it has failed
 

Trouble Code: P0128

ECT Sensor Below Thermostat Regulating Temperature

Trouble Code Conditions: DTC P0100-P0103, P0110-P0113, P0116-P0118, P0125, P0500, P0501-P0503, P1111-P1115 not set, ECT sensor less than 158ºF at startup, IAT sensor from 19-131ºF, engine runtime at 2-22 minutes, MAF sensor at 15-75 g/sec (avg. 14 g/sec), VSS over 3 mph for 1.5 m

Possible Causes:



Check the operation of the thermostat (it may be stuck open)
 
Coolant level is too low, or the coolant mixture is incorrect
 
ECT sensor signal circuit has a high resistance condition
 
ECT sensor is damaged or it has failed
 

Trouble Code: P0128

ECT Sensor Below Thermostat Regulating Temperature

Trouble Code Conditions: DTC P0100-P0103, P0110-P0113, P0116-P0118, P0125, P0500, P0501-P0503, P1111-P1115 not set, ECT sensor less than 158ºF at startup, IAT sensor from 19-131ºF, engine runtime at 2-22 minutes, MAF sensor at 15-75 g/sec (avg. 14 g/sec), VSS over 3 mph for 1.5 m

Possible Causes:



Check the operation of the thermostat (it may be stuck open)
 
Coolant level is too low, or the coolant mixture is incorrect
 
ECT sensor signal circuit has a high resistance condition
 
ECT sensor is damaged or it has failed
 

Trouble Code: P0130

HO2S-11 (Bank 1 Sensor 1) Circuit Closed Loop Performance

Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112-P0113, P0117-P0118, P0121-P0123, P0125-P0128, P0201-P0206, P0410, P0440, P0442, P0446, P0449 and P1441 not set, engine runtime 4 minutes, ECT sensor more than 122ºF, engine speed from 1000-3000 rpm, airflow from 13-30 

Possible Causes:



Air leaks in the exhaust system, intake manifold, vacuum lines
 
EVAP Purge system malfunction or charcoal canister problems
 
HO2S signal circuit is open between the sensor and the PCM
 
HO2S signal circuit is shorted to sensor or chassis ground
 
HO2S is da
 

Trouble Code: P0130

HO2S-11 (Bank 1 Sensor 1) Circuit Closed Loop Performance

Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112-P0113, P0117-P0118, P0121-P0123, P0125-P0128, P0201-P0206, P0410, P0440, P0442, P0446, P0449 and P1441 not set, engine runtime 4 minutes, ECT sensor more than 122ºF, engine speed from 1000-3000 rpm, airflow from 13-30 

Possible Causes:



Air leaks in the exhaust system, intake manifold, vacuum lines
 
EVAP Purge system malfunction or charcoal canister problems
 
HO2S signal circuit is open between the sensor and the PCM
 
HO2S signal circuit is shorted to sensor or chassis ground
 
HO2S is da
 

Trouble Code: P0131

HO2S-11 (Bank 1 Sensor 1) Circuit Low Input

Trouble Code Conditions: DTC P0101-P0103, P0107-P0108, P0112-P0113, P0117-P0118, P0121-P0125, P0128, P0201-P0206, P0410, P0440-P0449 and P1441 not set, running in closed loop for 4 minutes, A/F ratio from 14.5-14.8:1, TP angle from 3-40%, or on models with TAC, the APP sensor ind

Possible Causes:



Air leaks in the exhaust system, intake manifold, vacuum lines
 
Engine misfire condition present (look for P0300 series codes)
 
Fuel system too lean (possible low fuel pressure, water in fuel)
 
HO2S signal circuit is shorted to the sensor or chassis groun
 

Trouble Code: P0131

HO2S-11 (Bank 1 Sensor 1) Circuit Low Input

Trouble Code Conditions: DTC P0101-P0103, P0107-P0108, P0112-P0113, P0117-P0118, P0121-P0125, P0128, P0201-P0206, P0410, P0440-P0449 and P1441 not set, running in closed loop for 4 minutes, A/F ratio from 14.5-14.8:1, TP angle from 3-40%, or on models with TAC, the APP sensor ind

Possible Causes:



Air leaks in the exhaust system, intake manifold, vacuum lines
 
Engine misfire condition present (look for P0300 series codes)
 
Fuel system too lean (possible low fuel pressure, water in fuel)
 
HO2S signal circuit is shorted to the sensor or chassis groun
 

Trouble Code: P0132

HO2S-11 (Bank 1 Sensor 1) Circuit High Input

Trouble Code Conditions: DTC P0101, P0102, P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0125, P0128, P0201-P0206, P0410, P0440, P0442, P0443, P0446, P0449, or P1441not set, engine started, system voltage over 10.0v, engine running in closed loop for 4 mi

Possible Causes:



Fuel system is too rich (fuel pressure too high, fuel pressure regulator leaking, or one or more fuel injectors sticking/leaking)
 
HO2S element is silicon, water or fuel contaminated
 
HO2S signal circuit is shorted to system power (B+)
 
HO2S signal tracki
 

Trouble Code: P0132

HO2S-11 (Bank 1 Sensor 1) Circuit High Input

Trouble Code Conditions: DTC P0101, P0102, P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0125, P0128, P0201-P0206, P0410, P0440, P0442, P0443, P0446, P0449, or P1441not set, engine started, system voltage over 10.0v, engine running in closed loop for 4 mi

Possible Causes:



Fuel system is too rich (fuel pressure too high, fuel pressure regulator leaking, or one or more fuel injectors sticking/leaking)
 
HO2S element is silicon, water or fuel contaminated
 
HO2S signal circuit is shorted to system power (B+)
 
HO2S signal tracki
 

Trouble Code: P0133

HO2S-11 (Bank 1 Sensor 1) Slow Response

Trouble Code Conditions: DTC P0101-P0103, P0107-P0108, P0112-P0113, P0117-P0118, P0121-P0123, P0125, P0128, P0201-P0206, P0300, P0410, P0440-P0449 and P1441 not set, engine runtime over 4 minutes, ECT sensor more than 122ºF, engine speed from 1000-3000 rpm in closed loop, MAF sen

Possible Causes:



Exhaust leak present in the exhaust manifold or exhaust pipes
 
Fuel system is too rich (fuel pressure too high, fuel pressure regulator leaking, or one or more fuel injectors sticking/leaking)
 
HO2S element is silicon, water or fuel contaminated or it fai
 

Trouble Code: P0133

HO2S-11 (Bank 1 Sensor 1) Slow Response

Trouble Code Conditions: DTC P0101-P0103, P0107-P0108, P0112-P0113, P0117-P0118, P0121-P0123, P0125, P0128, P0201-P0206, P0300, P0410, P0440-P0449 and P1441 not set, engine runtime over 4 minutes, ECT sensor more than 122ºF, engine speed from 1000-3000 rpm in closed loop, MAF sen

Possible Causes:



Exhaust leak present in the exhaust manifold or exhaust pipes
 
Fuel system is too rich (fuel pressure too high, fuel pressure regulator leaking, or one or more fuel injectors sticking/leaking)
 
HO2S element is silicon, water or fuel contaminated or it fai
 

Trouble Code: P0134

HO2S-11 (Bank 1 Sensor 1) Insufficient Activity

Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112, P0113, P0116-P0118, P0121-P0123, P0125, P0128, P0201-P0206, P0410, P0440- P0443, P0446, P0449 and P1441 not set, engine runtime over 4 minutes, system voltage over 10.0v and the PCM detected the HO2S signal was fixed

Possible Causes:



HO2S heater is damaged or has failed
 
HO2S signal or ground circuit has a high resistance condition
 
HO2S signal circuit is open or shorted to system power (B+)
 
HO2S has failed (i.e., it is silicon, water or fuel contaminated)
 
PCM has failed
 

Trouble Code: P0134

HO2S-11 (Bank 1 Sensor 1) Insufficient Activity

Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112, P0113, P0116-P0118, P0121-P0123, P0125, P0128, P0201-P0206, P0410, P0440- P0443, P0446, P0449 and P1441 not set, engine runtime over 4 minutes, system voltage over 10.0v and the PCM detected the HO2S signal was fixed

Possible Causes:



HO2S heater is damaged or has failed
 
HO2S signal or ground circuit has a high resistance condition
 
HO2S signal circuit is open or shorted to system power (B+)
 
HO2S has failed (i.e., it is silicon, water or fuel contaminated)
 
PCM has failed
 

Trouble Code: P0135

HO2S-11 (Bank 1 Sensor 1) Heater Circuit

Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0121-P0123, P0125, P0128, P0201-P0206, P0410, P0440, P0442-P0449 and P1441 not set, ECT and IAT sensors less than 95ºF at startup and within 11ºF at startup, engine started, system voltage over 1

Possible Causes:



HO2S heater ground circuit is open or has high resistance
 
HO2S heater power circuit is open (test O2S fuse in fuse block)
 
HO2S heater element is damaged or has failed
 
PCM has failed
 

Trouble Code: P0135

HO2S-11 (Bank 1 Sensor 1) Heater Circuit

Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0121-P0123, P0125, P0128, P0201-P0206, P0410, P0440, P0442-P0449 and P1441 not set, ECT and IAT sensors less than 95ºF at startup and within 11ºF at startup, engine started, system voltage over 1

Possible Causes:



HO2S heater ground circuit is open or has high resistance
 
HO2S heater power circuit is open (test O2S fuse in fuse block)
 
HO2S heater element is damaged or has failed
 
PCM has failed
 

Trouble Code: P0137

HO2S-12 (Bank 1 Sensor 2) Circuit Low Input

Trouble Code Conditions: DTC P0101-P0103, P0107-P0108, P0112-P0113, P0117-P0118, P0121-P0125, P0128, P0201-P0206, P0410, P0440-P0449 and P1441 not set, running in closed loop for 4 minutes, A/F ratio from 14.5-14.8:1, TP angle from 3-40%, or on models with TAC, the APP sensor ind

Possible Causes:



Air leaks in the exhaust system, intake manifold, vacuum lines
 
Engine misfire condition present (look for P0300 series codes)
 
Fuel system too lean (possible low fuel pressure, water in fuel)
 
HO2S signal circuit is shorted to the sensor or chassis groun
 

Trouble Code: P0137

HO2S-12 (Bank 1 Sensor 2) Circuit Low Input

Trouble Code Conditions: DTC P0101-P0103, P0107-P0108, P0112-P0113, P0117-P0118, P0121-P0125, P0128, P0201-P0206, P0410, P0440-P0449 and P1441 not set, running in closed loop for 4 minutes, A/F ratio from 14.5-14.8:1, TP angle from 3-40%, or on models with TAC, the APP sensor ind

Possible Causes:



Air leaks in the exhaust system, intake manifold, vacuum lines
 
Engine misfire condition present (look for P0300 series codes)
 
Fuel system too lean (possible low fuel pressure, water in fuel)
 
HO2S signal circuit is shorted to the sensor or chassis groun
 

Trouble Code: P0138

HO2S-12 (Bank 1 Sensor 2) Circuit High Input

Trouble Code Conditions: DTC P0101, P0102, P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0125, P0128, P0201-P0206, P0410, P0440, P0442, P0443, P0446, P0449, or P1441not set, engine running in closed loop for 4 minutes, ECT sensor over 122ºF, system voltag

Possible Causes:



Fuel system too rich (fuel pressure too high, regulator leaking)
 
HO2S element is silicon, water or fuel contaminated
 
HO2S signal tracking (water intrusion) in the connector causing a short between the HO2S signal and heater power circuits
 
PCM has faile
 

Trouble Code: P0138

HO2S-12 (Bank 1 Sensor 2) Circuit High Input

Trouble Code Conditions: DTC P0101, P0102, P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0125, P0128, P0201-P0206, P0410, P0440, P0442, P0443, P0446, P0449, or P1441not set, engine running in closed loop for 4 minutes, ECT sensor over 122ºF, system voltag

Possible Causes:



Fuel system too rich (fuel pressure too high, regulator leaking)
 
HO2S element is silicon, water or fuel contaminated
 
HO2S signal tracking (water intrusion) in the connector causing a short between the HO2S signal and heater power circuits
 
PCM has faile
 

Trouble Code: P0140

HO2S-12 (Bank 1 Sensor 2) Insufficient Activity

Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0121-P0123, P0125, P0128, P0201-P0206, P0410, P0440, P0442, P0443, P0446, P0449 and P1441 not set, engine started, engine runtime over 409 seconds, Scan Tool and Intrusive tests all "off", system

Possible Causes:



Exhaust leak present in the exhaust manifold or exhaust pipes
 
HO2S signal or ground circuit has a high resistance condition
 
HO2S element is silicon, water or fuel contaminated
 
PCM has failed
 

Trouble Code: P0140

HO2S-12 (Bank 1 Sensor 2) Insufficient Activity

Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0121-P0123, P0125, P0128, P0201-P0206, P0410, P0440, P0442, P0443, P0446, P0449 and P1441 not set, engine started, engine runtime over 409 seconds, Scan Tool and Intrusive tests all "off", system

Possible Causes:



Exhaust leak present in the exhaust manifold or exhaust pipes
 
HO2S signal or ground circuit has a high resistance condition
 
HO2S element is silicon, water or fuel contaminated
 
PCM has failed
 

Trouble Code: P0141

HO2S-12 (Bank 1 Sensor 2) Heater Circuit

Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0121-P0123, P0125, P0128, P0201-P0206, P0410, P0440, P0442-P0449 and P1441 not set, ECT and IAT sensors less than 95ºF at startup and within 11ºF at startup, engine started, system voltage over 1

Possible Causes:



HO2S heater ground circuit is open or has high resistance
 
HO2S heater power circuit is open (test O2S fuse in fuse block)
 
HO2S heater element is damaged or has failed
 
PCM has failed
 

Trouble Code: P0141

HO2S-12 (Bank 1 Sensor 2) Heater Circuit

Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0121-P0123, P0125, P0128, P0201-P0206, P0410, P0440, P0442-P0449 and P1441 not set, ECT and IAT sensors less than 95ºF at startup and within 11ºF at startup, engine started, system voltage over 1

Possible Causes:



HO2S heater ground circuit is open or has high resistance
 
HO2S heater power circuit is open (test O2S fuse in fuse block)
 
HO2S heater element is damaged or has failed
 
PCM has failed
 

Trouble Code: P0143

HO2S-13 (Bank 1 Sensor 3) Circuit Low Input

Trouble Code Conditions: DTC P0101-P0103, P0107-P0108, P0112-P0113, P0117-P0118, P0121-P0125, P0128, P0201-P0206, P0410, P0440-P0449 and P1441 not set, engine running in closed loop, A/F ratio from 14.5-14.8:1, TP angle from 3-40%, ECT sensor over 122ºF, and the PCM detected the

Possible Causes:



Air leaks in the exhaust system, intake manifold, vacuum lines
 
Engine misfire condition present (look for P0300 series codes)
 
Fuel system too lean (possible low fuel pressure, water in fuel)
 
HO2S signal circuit is shorted to the sensor or chassis groun
 

Trouble Code: P0143

HO2S-13 (Bank 1 Sensor 3) Circuit Low Input

Trouble Code Conditions: DTC P0101-P0103, P0107-P0108, P0112-P0113, P0117-P0118, P0121-P0125, P0128, P0201-P0206, P0410, P0440-P0449 and P1441 not set, engine running in closed loop, A/F ratio from 14.5-14.8:1, TP angle from 3-40%, ECT sensor over 122ºF, and the PCM detected the

Possible Causes:



Air leaks in the exhaust system, intake manifold, vacuum lines
 
Engine misfire condition present (look for P0300 series codes)
 
Fuel system too lean (possible low fuel pressure, water in fuel)
 
HO2S signal circuit is shorted to the sensor or chassis groun
 

Trouble Code: P0144

HO2S-13 (Bank 1 Sensor 3) Circuit High Input

Trouble Code Conditions: P0121-P0125, P0201-P0206, P0410, P0440-P0449 and P1441 not set, engine running in closed loop, TP angle at 3-40%, ECT sensor over 122ºF, and the PCM detected the HO2S input was over 999 mv, or while in Decel Fuel mode, it was over 200 mv for 2 minutes.

Possible Causes:



Fuel system is too rich (fuel pressure too high, fuel pressure regulator leaking, or one or more fuel injectors sticking/leaking)
 
HO2S element is silicon, water or fuel contaminated
 
HO2S signal moisture tracking in the connector to signal circuit
 
PCM h
 

Trouble Code: P0144

HO2S-13 (Bank 1 Sensor 3) Circuit High Input

Trouble Code Conditions: P0121-P0125, P0201-P0206, P0410, P0440-P0449 and P1441 not set, engine running in closed loop, TP angle at 3-40%, ECT sensor over 122ºF, and the PCM detected the HO2S input was over 999 mv, or while in Decel Fuel mode, it was over 200 mv for 2 minutes.

Possible Causes:



Fuel system is too rich (fuel pressure too high, fuel pressure regulator leaking, or one or more fuel injectors sticking/leaking)
 
HO2S element is silicon, water or fuel contaminated
 
HO2S signal moisture tracking in the connector to signal circuit
 
PCM h
 

Trouble Code: P0146

HO2S-13 (Bank 1 Sensor 3) Insufficient Activity

Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0121-P0123, P0125, P0171-P0175, P0300, P0336, P0401, P0440, P0442, P0446 and P0449 not set, engine runtime over 4 minutes, and the PCM detected the HO2S signal was fixed from 425-475 mv.

Possible Causes:



HO2S heater is damaged or has failed
 
HO2S signal or ground circuit has a high resistance condition
 
HO2S signal circuit is open or shorted to system power (B+)
 
HO2S has failed (i.e., it is silicon, water or fuel contaminated)
 
PCM has failed
 

Trouble Code: P0146

HO2S-13 (Bank 1 Sensor 3) Insufficient Activity

Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0121-P0123, P0125, P0171-P0175, P0300, P0336, P0401, P0440, P0442, P0446 and P0449 not set, engine runtime over 4 minutes, and the PCM detected the HO2S signal was fixed from 425-475 mv.

Possible Causes:



HO2S heater is damaged or has failed
 
HO2S signal or ground circuit has a high resistance condition
 
HO2S signal circuit is open or shorted to system power (B+)
 
HO2S has failed (i.e., it is silicon, water or fuel contaminated)
 
PCM has failed
 

Trouble Code: P0147

HO2S-13 (Bank 1 Sensor 3) Heater Circuit

Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0121-P0123, P0125, P0171, P0172, P0174, P0175, P0300, P0336, P0401, P0440, P0442, P0446 and P0449 not set, engine started, ECT and IAT sensor less than 95ºF and within 11ºF at startup, engine run

Possible Causes:



HO2S heater ground circuit is open or has high resistance
 
HO2S heater power circuit is open (test O2S fuse in fuse block)
 
HO2S heater element is damaged or has failed
 
PCM has failed
 

Trouble Code: P0147

HO2S-13 (Bank 1 Sensor 3) Heater Circuit

Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0121-P0123, P0125, P0171, P0172, P0174, P0175, P0300, P0336, P0401, P0440, P0442, P0446 and P0449 not set, engine started, ECT and IAT sensor less than 95ºF and within 11ºF at startup, engine run

Possible Causes:



HO2S heater ground circuit is open or has high resistance
 
HO2S heater power circuit is open (test O2S fuse in fuse block)
 
HO2S heater element is damaged or has failed
 
PCM has failed
 

Trouble Code: P0150

HO2S-21 (Bank 2 Sensor 1) Closed Loop Performance

Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112-P0113, P0117-P0118, P0121-P0123, P0125, P0128, P0201-P0206, P0410, P0440, P0442, P0446, P0449 and P1441 not set; engine runtime 4 minutes, engine speed at 1000-3000 rpm, ECT sensor over 122ºF, airflow from 13-30 g/sec,

Possible Causes:



Air leaks in the exhaust system, intake manifold, vacuum lines
 
EVAP Purge system malfunction or charcoal canister problems
 
HO2S signal circuit is open between the sensor and the PCM
 
HO2S signal circuit is shorted to sensor or chassis ground
 
HO2S is da
 

Trouble Code: P0150

HO2S-21 (Bank 2 Sensor 1) Closed Loop Performance

Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112-P0113, P0117-P0118, P0121-P0123, P0125, P0128, P0201-P0206, P0410, P0440, P0442, P0446, P0449 and P1441 not set; engine runtime 4 minutes, engine speed at 1000-3000 rpm, ECT sensor over 122ºF, airflow from 13-30 g/sec,

Possible Causes:



Air leaks in the exhaust system, intake manifold, vacuum lines
 
EVAP Purge system malfunction or charcoal canister problems
 
HO2S signal circuit is open between the sensor and the PCM
 
HO2S signal circuit is shorted to sensor or chassis ground
 
HO2S is da
 

Trouble Code: P0151

HO2S-21 (Bank 2 Sensor 1) Circuit Low Input

Trouble Code Conditions: DTC P0101-P0103, P0107-P0108, P0112-P0113, P0117-P0118, P0121-P0125, P0128, P0201-P0206, P0410, P0440-P0449 and P1441 not set, running in closed loop for 4 minutes, A/F ratio from 14.5-14.8:1, TP angle from 3-40%, or on models with TAC, the APP sensor ind

Possible Causes:



Air leaks in the exhaust system, intake manifold, vacuum lines
 
Fuel system too lean (possible low fuel pressure, water in fuel)
 
HO2S signal circuit is shorted to the sensor or chassis ground
 
HO2S is damaged (i.e., cracked) or air reference hole clogged
 

Trouble Code: P0151

HO2S-21 (Bank 2 Sensor 1) Circuit Low Input

Trouble Code Conditions: DTC P0101-P0103, P0107-P0108, P0112-P0113, P0117-P0118, P0121-P0125, P0128, P0201-P0206, P0410, P0440-P0449 and P1441 not set, running in closed loop for 4 minutes, A/F ratio from 14.5-14.8:1, TP angle from 3-40%, or on models with TAC, the APP sensor ind

Possible Causes:



Air leaks in the exhaust system, intake manifold, vacuum lines
 
Fuel system too lean (possible low fuel pressure, water in fuel)
 
HO2S signal circuit is shorted to the sensor or chassis ground
 
HO2S is damaged (i.e., cracked) or air reference hole clogged
 

Trouble Code: P0152

HO2S-21 (Bank 2 Sensor 1) Circuit High Input

Trouble Code Conditions: DTC P0101, P0102, P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0125, P0128, P0201-P0206, P0410, P0440, P0442, P0443, P0446, P0449, or P1441not set, engine started, system voltage over 10.0v, engine running in closed loop for 4 mi

Possible Causes:



Fuel system rich (high fuel pressure, fuel pressure regulator leaking, or leaking injector)
 
HO2S element is silicon, water or fuel contaminated
 
HO2S signal circuit is shorted to system power (B+)
 
HO2S signal tracking (water intrusion) in the connector
 

Trouble Code: P0152

HO2S-21 (Bank 2 Sensor 1) Circuit High Input

Trouble Code Conditions: DTC P0101, P0102, P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0125, P0128, P0201-P0206, P0410, P0440, P0442, P0443, P0446, P0449, or P1441not set, engine started, system voltage over 10.0v, engine running in closed loop for 4 mi

Possible Causes:



Fuel system rich (high fuel pressure, fuel pressure regulator leaking, or leaking injector)
 
HO2S element is silicon, water or fuel contaminated
 
HO2S signal circuit is shorted to system power (B+)
 
HO2S signal tracking (water intrusion) in the connector
 

Trouble Code: P0153

HO2S-21 (Bank 2 Sensor 1) Slow Response

Trouble Code Conditions: DTC P0101-P0103, P0107-P0108, P0112-P0113, P0117-P0118, P0121-P0123, P0125, P0128, P0201-P0206, P0300, P0410, P0440-P0449 and P1441 not set, engine runtime over 4 minutes, ECT sensor more than 122ºF, engine speed from 1000-3000 rpm in closed loop, MAF sen

Possible Causes:



Exhaust leak present in the exhaust manifold or exhaust pipes
 
Fuel system is too rich (fuel pressure too high, fuel pressure regulator leaking, or one or more fuel injectors sticking/leaking)
 
HO2S element is silicon, water or fuel contaminated or it fai
 

Trouble Code: P0153

HO2S-21 (Bank 2 Sensor 1) Slow Response

Trouble Code Conditions: DTC P0101-P0103, P0107-P0108, P0112-P0113, P0117-P0118, P0121-P0123, P0125, P0128, P0201-P0206, P0300, P0410, P0440-P0449 and P1441 not set, engine runtime over 4 minutes, ECT sensor more than 122ºF, engine speed from 1000-3000 rpm in closed loop, MAF sen

Possible Causes:



Exhaust leak present in the exhaust manifold or exhaust pipes
 
Fuel system is too rich (fuel pressure too high, fuel pressure regulator leaking, or one or more fuel injectors sticking/leaking)
 
HO2S element is silicon, water or fuel contaminated or it fai
 

Trouble Code: P0154

HO2S-21 (Bank 2 Sensor 1) Insufficient Activity

Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112, P0113, P0116-P0118, P0121-P0123, P0125, P0128, P0201-P0206, P0410, P0440-P0449 and P1441 not set; engine runtime over 4 minutes and the PCM detected the HO2S signal was fixed at 400-500 mv for 60 seconds.

Possible Causes:



HO2S heater is damaged or has failed
 
HO2S signal or ground circuit has a high resistance condition
 
HO2S signal circuit is open or shorted to system power (B+)
 
HO2S has failed (i.e., it is silicon, water or fuel contaminated)
 
PCM has failed
 

Trouble Code: P0154

HO2S-21 (Bank 2 Sensor 1) Insufficient Activity

Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112, P0113, P0116-P0118, P0121-P0123, P0125, P0128, P0201-P0206, P0410, P0440-P0449 and P1441 not set; engine runtime over 4 minutes and the PCM detected the HO2S signal was fixed at 400-500 mv for 60 seconds.

Possible Causes:



HO2S heater is damaged or has failed
 
HO2S signal or ground circuit has a high resistance condition
 
HO2S signal circuit is open or shorted to system power (B+)
 
HO2S has failed (i.e., it is silicon, water or fuel contaminated)
 
PCM has failed
 

Trouble Code: P0155

HO2S-21 (Bank 2 Sensor 1) Heater Circuit

Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0121-P0123, P0125, P0128, P0201-P0206, P0410, P0440, P0442-P0449 and P1441 not set, engine started, ECT and IAT sensors less than 95ºF at startup and within 11ºF at startup, system voltage over 1

Possible Causes:



HO2S heater ground circuit is open or has high resistance
 
HO2S heater power circuit is open (test O2S fuse in fuse block)
 
HO2S heater element is damaged or has failed
 
PCM has failed
 

Trouble Code: P0155

HO2S-21 (Bank 2 Sensor 1) Heater Circuit

Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0121-P0123, P0125, P0128, P0201-P0206, P0410, P0440, P0442-P0449 and P1441 not set, engine started, ECT and IAT sensors less than 95ºF at startup and within 11ºF at startup, system voltage over 1

Possible Causes:



HO2S heater ground circuit is open or has high resistance
 
HO2S heater power circuit is open (test O2S fuse in fuse block)
 
HO2S heater element is damaged or has failed
 
PCM has failed
 

Trouble Code: P0171

Fuel Trim System Lean (Bank 1)

Trouble Code Conditions: DTC P0101-P0103, P0108, P0135, P0137, P0141, P0200, P0300, P0410, P0420, P0430, P0440-P0449, P0506, P0507 and P1441 not set, engine started, vehicle driven at less than 85 mph at 400-3000 rpm, BARO sensor more than 74 kPa (10.7 psi), ECT sensor from 167-2

Possible Causes:



Air leaks in intake manifold, exhaust pipes or exhaust manifold
 
Fuel control sensor is out of calibration (ECT, IAT or MAF)
 
Low fuel pressure (fuel filter clogged, pressure regulator failure)
 
One or more injectors restricted or pressure regulator has f
 

Trouble Code: P0171

Fuel Trim System Lean (Bank 1)

Trouble Code Conditions: DTC P0101-P0103, P0108, P0135, P0137, P0141, P0200, P0300, P0410, P0420, P0430, P0440-P0449, P0506, P0507 and P1441 not set, engine started, vehicle driven at less than 85 mph at 400-3000 rpm, BARO sensor more than 74 kPa (10.7 psi), ECT sensor from 167-2

Possible Causes:



Air leaks in intake manifold, exhaust pipes or exhaust manifold
 
Fuel control sensor is out of calibration (ECT, IAT or MAF)
 
Low fuel pressure (fuel filter clogged, pressure regulator failure)
 
One or more injectors restricted or pressure regulator has f
 

Trouble Code: P0172

Fuel Trim System Rich (Bank 1)

Trouble Code Conditions: DTC P0101-P0103, P0108, P0135, P0137, P0141, P0200, P0300, P0410, P0420, P0430, P0440-P0449, P0506, P0507 and P1441 not set, engine started, vehicle driven at less than 85 mph at 400-3000 rpm, BARO sensor more than 74 kPa (10.7 psi), ECT sensor from 167-2

Possible Causes:



Base engine "mechanical" fault affecting one or more cylinders
 
Excess fuel vapors in crankcase (the oil needs to be changed)
 
EVAP system component has failed or canister fuel saturated
 
Fuel control sensor is out of calibration (i.e., ECT, IAT or MAF)
 

Trouble Code: P0172

Fuel Trim System Rich (Bank 1)

Trouble Code Conditions: DTC P0101-P0103, P0108, P0135, P0137, P0141, P0200, P0300, P0410, P0420, P0430, P0440-P0449, P0506, P0507 and P1441 not set, engine started, vehicle driven at less than 85 mph at 400-3000 rpm, BARO sensor more than 74 kPa (10.7 psi), ECT sensor from 167-2

Possible Causes:



Base engine "mechanical" fault affecting one or more cylinders
 
Excess fuel vapors in crankcase (the oil needs to be changed)
 
EVAP system component has failed or canister fuel saturated
 
Fuel control sensor is out of calibration (i.e., ECT, IAT or MAF)
 

Trouble Code: P0174

Fuel Trim System Lean (Bank 2)

Trouble Code Conditions: DTC P0101-P0103, P0108, P0135, P0137, P0141, P0200, P0300, P0410, P0420, P0430, P0440-P0449, P0506, P0507 and P1441 not set, vehicle speed less than 85 mph at 400-3000 rpm, BARO sensor over 74 kPa, ECT sensor from 167-239ºF, IAT sensor from 4-194ºF, MAF s

Possible Causes:



Air leaks in intake manifold, exhaust pipes or exhaust manifold
 
Fuel control sensor is out of calibration (ECT, IAT or MAF)
 
Low fuel pressure (fuel filter clogged, pressure regulator failure)
 
One or more injectors restricted or pressure regulator has f
 

Trouble Code: P0174

Fuel Trim System Lean (Bank 2)

Trouble Code Conditions: DTC P0101-P0103, P0108, P0135, P0137, P0141, P0200, P0300, P0410, P0420, P0430, P0440-P0449, P0506, P0507 and P1441 not set, vehicle speed less than 85 mph at 400-3000 rpm, BARO sensor over 74 kPa, ECT sensor from 167-239ºF, IAT sensor from 4-194ºF, MAF s

Possible Causes:



Air leaks in intake manifold, exhaust pipes or exhaust manifold
 
Fuel control sensor is out of calibration (ECT, IAT or MAF)
 
Low fuel pressure (fuel filter clogged, pressure regulator failure)
 
One or more injectors restricted or pressure regulator has f
 

Trouble Code: P0175

Fuel Trim System Rich (Bank 2)

Trouble Code Conditions: DTC P0101-P0103, P0108, P0135, P0137, P0141, P0200, P0300, P0410, P0420, P0430, P0440-P0449, P0506, P0507 and P1441 not set, engine started, vehicle driven at less than 85 mph at 400-3000 rpm, BARO sensor more than 74 kPa (10.7 psi), ECT sensor from 167-2

Possible Causes:



Base engine "mechanical" fault affecting one or more cylinders
 
Excess fuel vapors in crankcase (the oil needs to be changed)
 
EVAP system component has failed or canister fuel saturated
 
Fuel control sensor is out of calibration (i.e., ECT, IAT or MAF)
 

Trouble Code: P0175

Fuel Trim System Rich (Bank 2)

Trouble Code Conditions: DTC P0101-P0103, P0108, P0135, P0137, P0141, P0200, P0300, P0410, P0420, P0430, P0440-P0449, P0506, P0507 and P1441 not set, engine started, vehicle driven at less than 85 mph at 400-3000 rpm, BARO sensor more than 74 kPa (10.7 psi), ECT sensor from 167-2

Possible Causes:



Base engine "mechanical" fault affecting one or more cylinders
 
Excess fuel vapors in crankcase (the oil needs to be changed)
 
EVAP system component has failed or canister fuel saturated
 
Fuel control sensor is out of calibration (i.e., ECT, IAT or MAF)
 

Trouble Code: P0201

Fuel Injector 1 Control Circuit Malfunction

Trouble Code Conditions: Engine started; system voltage over 10.0v and the PCM detected an unexpected voltage condition on the Fuel Injector 1 circuit for 5 seconds. Drive the vehicle at cruise speed and record the misfire current counters to determine if more than one cylinder i

Possible Causes:



Injector 1 power circuit (B+) is open (check the power fuse)
 
Injector 1 control circuit is open between injector and PCM
 
Injector 1 control circuit is grounded between injector and PCM
 
Injector 1 is damaged or it has failed
 
PCM is damaged
 

Trouble Code: P0201

Fuel Injector 1 Control Circuit Malfunction

Trouble Code Conditions: Engine started; system voltage over 10.0v and the PCM detected an unexpected voltage condition on the Fuel Injector 1 circuit for 5 seconds. Drive the vehicle at cruise speed and record the misfire current counters to determine if more than one cylinder i

Possible Causes:



Injector 1 power circuit (B+) is open (check the power fuse)
 
Injector 1 control circuit is open between injector and PCM
 
Injector 1 control circuit is grounded between injector and PCM
 
Injector 1 is damaged or it has failed
 
PCM is damaged
 

Trouble Code: P0202

Fuel Injector 2 Control Circuit Malfunction

Trouble Code Conditions: Engine started; system voltage over 10.0v and the PCM detected an unexpected voltage condition on the Fuel Injector 2 circuit for 5 seconds. Drive the vehicle at cruise speed and record the misfire current counters to determine if more than one cylinder i

Possible Causes:



Injector 2 power circuit (B+) is open (check the power fuse)
 
Injector 2 control circuit is open between injector and PCM
 
Injector 2 control circuit is grounded between injector and PCM
 
Injector 2 is damaged or it has failed
 
PCM is damaged
 

Trouble Code: P0202

Fuel Injector 2 Control Circuit Malfunction

Trouble Code Conditions: Engine started; system voltage over 10.0v and the PCM detected an unexpected voltage condition on the Fuel Injector 2 circuit for 5 seconds. Drive the vehicle at cruise speed and record the misfire current counters to determine if more than one cylinder i

Possible Causes:



Injector 2 power circuit (B+) is open (check the power fuse)
 
Injector 2 control circuit is open between injector and PCM
 
Injector 2 control circuit is grounded between injector and PCM
 
Injector 2 is damaged or it has failed
 
PCM is damaged
 

Trouble Code: P0203

Fuel Injector 3 Control Circuit Malfunction

Trouble Code Conditions: Engine started; system voltage over 10.0v and the PCM detected an unexpected voltage condition on the Fuel Injector 3 circuit for 5 seconds. Drive the vehicle at cruise speed and record the misfire current counters to determine if more than one cylinder i

Possible Causes:



Injector 3 power circuit (B+) is open (check the power fuse)
 
Injector 3 control circuit is open between injector and PCM
 
Injector 3 control circuit is grounded between injector and PCM
 
Injector 3 is damaged or it has failed
 
PCM is damaged
 

Trouble Code: P0203

Fuel Injector 3 Control Circuit Malfunction

Trouble Code Conditions: Engine started; system voltage over 10.0v and the PCM detected an unexpected voltage condition on the Fuel Injector 3 circuit for 5 seconds. Drive the vehicle at cruise speed and record the misfire current counters to determine if more than one cylinder i

Possible Causes:



Injector 3 power circuit (B+) is open (check the power fuse)
 
Injector 3 control circuit is open between injector and PCM
 
Injector 3 control circuit is grounded between injector and PCM
 
Injector 3 is damaged or it has failed
 
PCM is damaged
 

Trouble Code: P0204

Fuel Injector 4 Control Circuit Malfunction

Trouble Code Conditions: Engine started; system voltage over 10.0v and the PCM detected an unexpected voltage condition on the Fuel Injector 4 circuit for 5 seconds. Drive the vehicle at cruise speed and record the misfire current counters to determine if more than one cylinder i

Possible Causes:



Injector 4 power circuit (B+) is open (check the power fuse)
 
Injector 4 control circuit is open between injector and PCM
 
Injector 4 control circuit is grounded between injector and PCM
 
Injector 4 is damaged or it has failed
 
PCM is damaged
 

Trouble Code: P0204

Fuel Injector 4 Control Circuit Malfunction

Trouble Code Conditions: Engine started; system voltage over 10.0v and the PCM detected an unexpected voltage condition on the Fuel Injector 4 circuit for 5 seconds. Drive the vehicle at cruise speed and record the misfire current counters to determine if more than one cylinder i

Possible Causes:



Injector 4 power circuit (B+) is open (check the power fuse)
 
Injector 4 control circuit is open between injector and PCM
 
Injector 4 control circuit is grounded between injector and PCM
 
Injector 4 is damaged or it has failed
 
PCM is damaged
 

Trouble Code: P0205

Fuel Injector 5 Control Circuit Malfunction

Trouble Code Conditions: Engine started; system voltage over 10.0v and the PCM detected an unexpected voltage condition on the Fuel Injector 5 circuit for 5 seconds. Drive the vehicle at cruise speed and record the misfire current counters to determine if more than one cylinder i

Possible Causes:



Injector 5 power circuit (B+) is open (check the power fuse)
 
Injector 5 control circuit is open between injector and PCM
 
Injector 5 control circuit is grounded between injector and PCM
 
Injector 5 is damaged or it has failed
 
PCM is damaged
 

Trouble Code: P0205

Fuel Injector 5 Control Circuit Malfunction

Trouble Code Conditions: Engine started; system voltage over 10.0v and the PCM detected an unexpected voltage condition on the Fuel Injector 5 circuit for 5 seconds. Drive the vehicle at cruise speed and record the misfire current counters to determine if more than one cylinder i

Possible Causes:



Injector 5 power circuit (B+) is open (check the power fuse)
 
Injector 5 control circuit is open between injector and PCM
 
Injector 5 control circuit is grounded between injector and PCM
 
Injector 5 is damaged or it has failed
 
PCM is damaged
 

Trouble Code: P0206

Fuel Injector 6 Control Circuit Malfunction

Trouble Code Conditions: Engine started; system voltage over 10.0v and the PCM detected an unexpected voltage condition on the Fuel Injector 6 circuit for 5 seconds. Drive the vehicle at cruise speed and record the misfire current counters to determine if more than one cylinder i

Possible Causes:



Injector 6 power circuit (B+) is open (check the power fuse)
 
Injector 6 control circuit is open between injector and PCM
 
Injector 6 control circuit is grounded between injector and PCM
 
Injector 6 is damaged or it has failed
 
PCM is damaged
 

Trouble Code: P0206

Fuel Injector 6 Control Circuit Malfunction

Trouble Code Conditions: Engine started; system voltage over 10.0v and the PCM detected an unexpected voltage condition on the Fuel Injector 6 circuit for 5 seconds. Drive the vehicle at cruise speed and record the misfire current counters to determine if more than one cylinder i

Possible Causes:



Injector 6 power circuit (B+) is open (check the power fuse)
 
Injector 6 control circuit is open between injector and PCM
 
Injector 6 control circuit is grounded between injector and PCM
 
Injector 6 is damaged or it has failed
 
PCM is damaged
 

Trouble Code: P0300

Multiple Engine Misfire Detected

Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0117, P0118, P0121-P0123, P0125, P0336, P0341, P0502-P0503, P1106-P1107, P1114, P1115, P1121, P1122, P1336 and P1374 not set, engine speed from 550-5850 rpm, ECT sensor from 21-248ºF, system voltage over 10.0v, TP angle ste

Possible Causes:



Base engine mechanical or fuel metering fault that affects one or more cylinders
 
Fuel pressure too low or too high, fuel supply contaminated
 
EVAP system problem or the EVAP canister is fuel saturated
 
EGR valve is stuck open or the PCV system has a vacu
 

Trouble Code: P0300

Multiple Engine Misfire Detected

Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0117, P0118, P0121-P0123, P0125, P0336, P0341, P0502-P0503, P1106-P1107, P1114, P1115, P1121, P1122, P1336 and P1374 not set, engine speed from 550-5850 rpm, ECT sensor from 21-248ºF, system voltage over 10.0v, TP angle ste

Possible Causes:



Base engine mechanical or fuel metering fault that affects one or more cylinders
 
Fuel pressure too low or too high, fuel supply contaminated
 
EVAP system problem or the EVAP canister is fuel saturated
 
EGR valve is stuck open or the PCV system has a vacu
 

Trouble Code: P0325

Knock Sensor Range/Performance

Trouble Code Conditions: DTC P0101-P0103, P0116-P0118, P0121-P0123, P0125, P0128, P0336, P0341, P0502, P0503, P1114, P1115, P1121 and P1336 not set, engine started, engine speed from 1000-2500 rpm for over 30 seconds, ECT sensor more than 140ºF, TP angle over 10%, engine load ove

Possible Causes:



Knock sensor signal circuit is open, shorted to ground or power
 
Knock sensor ground circuit is open (i.e., not mounted properly)
 
Knock sensor is damaged or has failed
 
On modules with an integrated sensor, clear the codes and retest for codes. If the sa
 

Trouble Code: P0325

Knock Sensor Range/Performance

Trouble Code Conditions: DTC P0101-P0103, P0116-P0118, P0121-P0123, P0125, P0128, P0336, P0341, P0502, P0503, P1114, P1115, P1121 and P1336 not set, engine started, engine speed from 1000-2500 rpm for over 30 seconds, ECT sensor more than 140ºF, TP angle over 10%, engine load ove

Possible Causes:



Knock sensor signal circuit is open, shorted to ground or power
 
Knock sensor ground circuit is open (i.e., not mounted properly)
 
Knock sensor is damaged or has failed
 
On modules with an integrated sensor, clear the codes and retest for codes. If the sa
 

Trouble Code: P0327

Knock Sensor Circuit Malfunction (Bank 1)

Trouble Code Conditions: DTC P0101-P0103, P0116-P0118, P0121-P0123, P0128, P0336, P0341, P0502, P0503, P1114-P1122 and P1336 not set, engine started, engine runtime 30 seconds at 1000-2500 rpm, ECT sensor more than 140ºF, TP angle over 10%, engine load over 40%, and the PCM detec

Possible Causes:



Knock sensor signal circuit is open, shorted to ground or power
 
Knock sensor ground circuit is open (check for proper torque)
 
Knock sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0327

Knock Sensor Circuit Malfunction (Bank 1)

Trouble Code Conditions: DTC P0101-P0103, P0116-P0118, P0121-P0123, P0128, P0336, P0341, P0502, P0503, P1114-P1122 and P1336 not set, engine started, engine runtime 30 seconds at 1000-2500 rpm, ECT sensor more than 140ºF, TP angle over 10%, engine load over 40%, and the PCM detec

Possible Causes:



Knock sensor signal circuit is open, shorted to ground or power
 
Knock sensor ground circuit is open (check for proper torque)
 
Knock sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0332

Knock Sensor Circuit Malfunction (Bank 2)

Trouble Code Conditions: DTC P0101-P0103, P0116-P0118, P0121-P0123, P0128, P0336, P0341, P0502, P0503, P1114-P1122 and P1336 not set, engine started, engine runtime 30 seconds at 1000-2500 rpm, ECT sensor more than 140ºF, TP angle over 10%, engine load over 40%, and the PCM detec

Possible Causes:



Knock sensor signal circuit is open, shorted to ground or power
 
Knock sensor ground circuit is open (check for proper torque)
 
Knock sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0332

Knock Sensor Circuit Malfunction (Bank 2)

Trouble Code Conditions: DTC P0101-P0103, P0116-P0118, P0121-P0123, P0128, P0336, P0341, P0502, P0503, P1114-P1122 and P1336 not set, engine started, engine runtime 30 seconds at 1000-2500 rpm, ECT sensor more than 140ºF, TP angle over 10%, engine load over 40%, and the PCM detec

Possible Causes:



Knock sensor signal circuit is open, shorted to ground or power
 
Knock sensor ground circuit is open (check for proper torque)
 
Knock sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0336

Crankshaft Reference 18X Range/Performance

Trouble Code Conditions: Engine started; with 3X REF signals detected, and the PCM did not detect any 18X reference pulses for one engine cycle (i.e., 720 degrees of crankshaft rotation) during the CCM test.

Possible Causes:



CKP sensor signal circuit is open or shorted to ground
 
CKP sensor VREF circuit is open between the sensor and PCM
 
CKP sensor ground (Low Reference) circuit is open
 
CKP sensor is damaged or it failed (check crankshaft reluctor)
 
Check for CKP sensor wir
 

Trouble Code: P0336

Crankshaft Reference 18X Range/Performance

Trouble Code Conditions: Engine started; with 3X REF signals detected, and the PCM did not detect any 18X reference pulses for one engine cycle (i.e., 720 degrees of crankshaft rotation) during the CCM test.

Possible Causes:



CKP sensor signal circuit is open or shorted to ground
 
CKP sensor VREF circuit is open between the sensor and PCM
 
CKP sensor ground (Low Reference) circuit is open
 
CKP sensor is damaged or it failed (check crankshaft reluctor)
 
Check for CKP sensor wir
 

Trouble Code: P0341

CMP Sensor Signal Range/Performance

Trouble Code Conditions: Engine started; engine running with 3X signals received, and the PCM did not detect a CMP sensor pulse for each engine revolution.

Possible Causes:



CMP sensor signal circuit is open, shorted to ground or VREF
 
CMP sensor signal wire is routed to close to the Generator, spark plug wires or any other possible cause of EMI/RFI
 
CMP sensor is cracked, damaged or has failed
 
PCM has failed
 
TSB 02-06-04-0
 

Trouble Code: P0341

CMP Sensor Signal Range/Performance

Trouble Code Conditions: Engine started; engine running with 3X signals received, and the PCM did not detect a CMP sensor pulse for each engine revolution.

Possible Causes:



CMP sensor signal circuit is open, shorted to ground or VREF
 
CMP sensor signal wire is routed to close to the Generator, spark plug wires or any other possible cause of EMI/RFI
 
CMP sensor is cracked, damaged or has failed
 
PCM has failed
 
TSB 02-06-04-0
 

Trouble Code: P0401

Insufficient EGR Flow Detected

Trouble Code Conditions: DTC P0101, P0102, P0103, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0121, P0122, P0123, P0201-P0206, P0300, P0336, P0403, P0404, P0405, P0502, P0503, P0506, P0507, P0604, P0606, P1106, P1107, P1112, P1114, P1115, P1120, P1121, P1122, P1125, P1220,

Possible Causes:



Base engine problem or any other problem that causes the engine to run poorly
 
EGR passages or intake passages clogged or restricted
 
EGR pipe is clogged, dirty or otherwise restricted
 
EGR vacuum hoses damaged, loose or routed incorrectly
 
EGR solenoid v
 

Trouble Code: P0401

Insufficient EGR Flow Detected

Trouble Code Conditions: DTC P0101, P0102, P0103, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0121, P0122, P0123, P0201-P0206, P0300, P0336, P0403, P0404, P0405, P0502, P0503, P0506, P0507, P0604, P0606, P1106, P1107, P1112, P1114, P1115, P1120, P1121, P1122, P1125, P1220,

Possible Causes:



Base engine problem or any other problem that causes the engine to run poorly
 
EGR passages or intake passages clogged or restricted
 
EGR pipe is clogged, dirty or otherwise restricted
 
EGR vacuum hoses damaged, loose or routed incorrectly
 
EGR solenoid v
 

Trouble Code: P0403

EGR Solenoid Control Circuit Malfunction

Trouble Code Conditions: Engine started; system voltage over 10.0v and the PCM detected an unexpected voltage condition on the EGR solenoid control circuit for 20 seconds during the CCM test.

Possible Causes:



EGR solenoid control circuit is open or shorted to ground
 
EGR solenoid control circuit is shorted to system power (B+)
 
EGR solenoid high control (VREF) circuit is open
 
EGR solenoid is damaged or has failed
 
PCM has failed
 

Trouble Code: P0403

EGR Solenoid Control Circuit Malfunction

Trouble Code Conditions: Engine started; system voltage over 10.0v and the PCM detected an unexpected voltage condition on the EGR solenoid control circuit for 20 seconds during the CCM test.

Possible Causes:



EGR solenoid control circuit is open or shorted to ground
 
EGR solenoid control circuit is shorted to system power (B+)
 
EGR solenoid high control (VREF) circuit is open
 
EGR solenoid is damaged or has failed
 
PCM has failed
 

Trouble Code: P0404

EGR Open Position Signal Range/Performance

Trouble Code Conditions: Engine started; system voltage over 10.0v, EGR solenoid "on", and the PCM detected more than a 15% difference between the Actual and Desired EGR Position signal for 25 seconds.

Possible Causes:



EGR sensor signal circuit is open, shorted to ground or power
 
EGR sensor ground or VREF circuit is open
 
EGR valve seat or pintle contains debris or carbon (inspect and clean)
 
EGR valve is contaminated, clogged, damaged or has failed
 
PCM has failed
 

Trouble Code: P0404

EGR Open Position Signal Range/Performance

Trouble Code Conditions: Engine started; system voltage over 10.0v, EGR solenoid "on", and the PCM detected more than a 15% difference between the Actual and Desired EGR Position signal for 25 seconds.

Possible Causes:



EGR sensor signal circuit is open, shorted to ground or power
 
EGR sensor ground or VREF circuit is open
 
EGR valve seat or pintle contains debris or carbon (inspect and clean)
 
EGR valve is contaminated, clogged, damaged or has failed
 
PCM has failed
 

Trouble Code: P0405

EGR Sensor Circuit Low Input

Trouble Code Conditions: Engine started; system voltage over 10.0v and the PCM detected the EGR signal was less than 0.14v for 20 seconds.

Possible Causes:



EGR position sensor signal circuit is open or shorted to ground
 
EGR position sensor VREF circuit is open or shorted to ground
 
EGR position sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0405

EGR Sensor Circuit Low Input

Trouble Code Conditions: Engine started; system voltage over 10.0v and the PCM detected the EGR signal was less than 0.14v for 20 seconds.

Possible Causes:



EGR position sensor signal circuit is open or shorted to ground
 
EGR position sensor VREF circuit is open or shorted to ground
 
EGR position sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0420

Catalyst System Low Efficiency (Bank 1)

Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112-P0118, P0125, P0130 to P0140, P0141, P0150-P0155, P0171-P0175, P0201-P0206, P0300, P0325, P0336, P0341, P0401-P0405, P0440-P0449, P0502-P0507, P1120, P1125, P1133-P1134, P1153-P1154, P1220, P1221, P1336, P1352, P1361,

Possible Causes:



Air leaks at the exhaust manifold or in the exhaust pipes
 
Base engine problems (i.e., high engine oil or coolant usage)
 
Catalytic converter is damaged, contaminated or has failed
 
Continuous engine misfire conditions, or weak or low coil output
 
Front H
 

Trouble Code: P0420

Catalyst System Low Efficiency (Bank 1)

Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112-P0118, P0125, P0130 to P0140, P0141, P0150-P0155, P0171-P0175, P0201-P0206, P0300, P0325, P0336, P0341, P0401-P0405, P0440-P0449, P0502-P0507, P1120, P1125, P1133-P1134, P1153-P1154, P1220, P1221, P1336, P1352, P1361,

Possible Causes:



Air leaks at the exhaust manifold or in the exhaust pipes
 
Base engine problems (i.e., high engine oil or coolant usage)
 
Catalytic converter is damaged, contaminated or has failed
 
Continuous engine misfire conditions, or weak or low coil output
 
Front H
 

Trouble Code: P0440

EVAP System Malfunction

Trouble Code Conditions: DTC P0107, 0108, P0112, P0113, P0116-P0118, P0125, P0443, P0449, P0452, P0453, P1106, P1107, P1112, P1114, P1120 and P1221 not set, engine started, ECT and IAT sensors from 39-86ºF with within 16ºF at startup, vehicle driven at a steady speed of less than

Possible Causes:



Charcoal canister is loaded with fuel or moisture
 
Fuel filler cap is loose, cross-threaded, damaged or wrong part
 
Fuel tank, fuel filler neck or fuel sending unit 'O' ring is leaking
 
Fuel tank pressure sensor is damaged, disconnected or it failed
 
Fuel
 

Trouble Code: P0440

EVAP System Malfunction

Trouble Code Conditions: DTC P0107, 0108, P0112, P0113, P0116-P0118, P0125, P0443, P0449, P0452, P0453, P1106, P1107, P1112, P1114, P1120 and P1221 not set, engine started, ECT and IAT sensors from 39-86ºF with within 16ºF at startup, vehicle driven at a steady speed of less than

Possible Causes:



Charcoal canister is loaded with fuel or moisture
 
Fuel filler cap is loose, cross-threaded, damaged or wrong part
 
Fuel tank, fuel filler neck or fuel sending unit 'O' ring is leaking
 
Fuel tank pressure sensor is damaged, disconnected or it failed
 
Fuel
 

Trouble Code: P0442

EVAP System Small Leak (0.040") Detected

Trouble Code Conditions: DTC P0107, P0108, P0112, P0113, P0116-P0118, P0125, P0443, P0449, P0452, P0453, P1106, P1107, P1112, P1114, P1120 and P1221 not set, engine started, ECT and IAT sensors from 39-86ºF and within 16ºF at startup, BARO sensor more than 75 kPa, fuel level from

Possible Causes:



Charcoal canister is loaded with fuel or moisture
 
Fuel filler cap is loose, cross-threaded, damaged or wrong part
 
Fuel tank, fuel filler neck or fuel sending unit 'O' ring is leaking
 
Fuel tank pressure sensor is damaged, disconnected or it failed
 
Fuel
 

Trouble Code: P0442

EVAP System Small Leak (0.040") Detected

Trouble Code Conditions: DTC P0107, P0108, P0112, P0113, P0116-P0118, P0125, P0443, P0449, P0452, P0453, P1106, P1107, P1112, P1114, P1120 and P1221 not set, engine started, ECT and IAT sensors from 39-86ºF and within 16ºF at startup, BARO sensor more than 75 kPa, fuel level from

Possible Causes:



Charcoal canister is loaded with fuel or moisture
 
Fuel filler cap is loose, cross-threaded, damaged or wrong part
 
Fuel tank, fuel filler neck or fuel sending unit 'O' ring is leaking
 
Fuel tank pressure sensor is damaged, disconnected or it failed
 
Fuel
 

Trouble Code: P0443

EVAP Purge Solenoid Control Circuit Malfunction

Trouble Code Conditions: Engine started; system voltage over 10.0v and the PCM detected the Commanded and Actual state of the Purge Solenoid driver control circuit did not match for over 5 seconds.

Possible Causes:



Purge solenoid control circuit is open or shorted to ground
 
Purge solenoid control circuit is shorted to system power (B+)
 
Purge solenoid power circuit is open (test ENG CTRL fuse)
 
Purge solenoid is damaged or has failed
 
PCM has failed
 

Trouble Code: P0443

EVAP Purge Solenoid Control Circuit Malfunction

Trouble Code Conditions: Engine started; system voltage over 10.0v and the PCM detected the Commanded and Actual state of the Purge Solenoid driver control circuit did not match for over 5 seconds.

Possible Causes:



Purge solenoid control circuit is open or shorted to ground
 
Purge solenoid control circuit is shorted to system power (B+)
 
Purge solenoid power circuit is open (test ENG CTRL fuse)
 
Purge solenoid is damaged or has failed
 
PCM has failed
 

Trouble Code: P0446

EVAP Vent System Performance

Trouble Code Conditions: DTC P0107, P0108, P0112, P0113, P0116-P0118, P0125, P0443, P0449, P0452, P0453, P1106, P1107, P1112, P1114, P1120 and P1221 not set, engine started, ECT and IAT sensors from 39-86ºF and within 16ºF at startup, BARO sensor over 75 kPa, fuel level from 15-8

Possible Causes:



EVAP vent fresh air hose is clogged, kinked or restricted
 
EVAP Vent solenoid is contaminated, damaged or has failed
 
FTP sensor is out-of-calibration, damaged or "skewed"
 
PCM has failed
 

Trouble Code: P0446

EVAP Vent System Performance

Trouble Code Conditions: DTC P0107, P0108, P0112, P0113, P0116-P0118, P0125, P0443, P0449, P0452, P0453, P1106, P1107, P1112, P1114, P1120 and P1221 not set, engine started, ECT and IAT sensors from 39-86ºF and within 16ºF at startup, BARO sensor over 75 kPa, fuel level from 15-8

Possible Causes:



EVAP vent fresh air hose is clogged, kinked or restricted
 
EVAP Vent solenoid is contaminated, damaged or has failed
 
FTP sensor is out-of-calibration, damaged or "skewed"
 
PCM has failed
 

Trouble Code: P0449

EVAP Vent Solenoid Control Circuit Malfunction

Trouble Code Conditions: Engine started; system voltage over 10.0v and the PCM detected the Commanded and Actual state of the Vent Solenoid driver control circuit did not match for over 5 seconds.

Possible Causes:



Vent solenoid control circuit is open, shorted to ground or B+
 
Vent solenoid power circuit is open (test the ENG CTRL fuse)
 
Vent solenoid is damaged or has failed
 
PCM has failed
 

Trouble Code: P0449

EVAP Vent Solenoid Control Circuit Malfunction

Trouble Code Conditions: Engine started; system voltage over 10.0v and the PCM detected the Commanded and Actual state of the Vent Solenoid driver control circuit did not match for over 5 seconds.

Possible Causes:



Vent solenoid control circuit is open, shorted to ground or B+
 
Vent solenoid power circuit is open (test the ENG CTRL fuse)
 
Vent solenoid is damaged or has failed
 
PCM has failed
 

Trouble Code: P0452

Fuel Tank Pressure Sensor Circuit Low Input

Trouble Code Conditions: Key on or engine running; and the PCM detected an unexpected "low" voltage condition (less than 0.10v) on the Fuel Tank Pressure sensor signal circuit for 5 seconds in the CCM test.

Possible Causes:



FTP sensor signal circuit is open or shorted to ground
 
FTP sensor VREF circuit is open or shorted to ground
 
FTP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0452

Fuel Tank Pressure Sensor Circuit Low Input

Trouble Code Conditions: Key on or engine running; and the PCM detected an unexpected "low" voltage condition (less than 0.10v) on the Fuel Tank Pressure sensor signal circuit for 5 seconds in the CCM test.

Possible Causes:



FTP sensor signal circuit is open or shorted to ground
 
FTP sensor VREF circuit is open or shorted to ground
 
FTP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0453

Fuel Tank Pressure Sensor Circuit High Input

Trouble Code Conditions: Key on or engine running; and the PCM detected an unexpected "high" voltage condition (more than 4.90v) on the Fuel Tank Pressure sensor signal circuit for 5 seconds in the test.

Possible Causes:



FTP sensor signal circuit is shorted to VREF or system power
 
FTP sensor ground circuit is open between sensor and PCM
 
FTP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0453

Fuel Tank Pressure Sensor Circuit High Input

Trouble Code Conditions: Key on or engine running; and the PCM detected an unexpected "high" voltage condition (more than 4.90v) on the Fuel Tank Pressure sensor signal circuit for 5 seconds in the test.

Possible Causes:



FTP sensor signal circuit is shorted to VREF or system power
 
FTP sensor ground circuit is open between sensor and PCM
 
FTP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0461

Fuel Level Sensor Signal Range/Performance

Trouble Code Conditions: Engine started; Fuel Level Sensor indicating over 9.1 gallons (34.4 liters) of fuel present, then the vehicle driven for 150 accumulated miles, and the PCM detected the fuel tank level did not decrease by at least 3/4 gallon (3 liters) under these conditi

Possible Causes:



Fuel level sensor signal circuit is open or shorted to ground between the fuel level sensor and the PCM connector
 
Fuel level sensor ground circuit is open or has high resistance
 
Fuel level sender is damaged, binding or not aligned properly
 
Instrument c
 

Trouble Code: P0461

Fuel Level Sensor Signal Range/Performance

Trouble Code Conditions: Engine started; Fuel Level Sensor indicating over 9.1 gallons (34.4 liters) of fuel present, then the vehicle driven for 150 accumulated miles, and the PCM detected the fuel tank level did not decrease by at least 3/4 gallon (3 liters) under these conditi

Possible Causes:



Fuel level sensor signal circuit is open or shorted to ground between the fuel level sensor and the PCM connector
 
Fuel level sensor ground circuit is open or has high resistance
 
Fuel level sender is damaged, binding or not aligned properly
 
Instrument c
 

Trouble Code: P0462

Fuel Level Sensor Low Input

Trouble Code Conditions: DTC P0601 not set; engine running, system voltage over 10.0v and the PCM detected the Fuel Level sensor signal indicated less than 0.39v for over 6 minutes during the CCM test.

Possible Causes:



Fuel level sensor signal circuit is shorted to ground between the fuel level sensor and the PCM connector
 
Fuel level sender is damaged, binding or not aligned properly
 
Instrument cluster or the PCM has failed
 
TSB 01-06-04-025 contains a repair procedur
 

Trouble Code: P0462

Fuel Level Sensor Low Input

Trouble Code Conditions: DTC P0601 not set; engine running, system voltage over 10.0v and the PCM detected the Fuel Level sensor signal indicated less than 0.39v for over 6 minutes during the CCM test.

Possible Causes:



Fuel level sensor signal circuit is shorted to ground between the fuel level sensor and the PCM connector
 
Fuel level sender is damaged, binding or not aligned properly
 
Instrument cluster or the PCM has failed
 
TSB 01-06-04-025 contains a repair procedur
 

Trouble Code: P0463

Fuel Level Sensor High Input

Trouble Code Conditions: Engine started; system voltage over 10.0v and the PCM detected the Fuel Level sensor signal indicated more than 2.90v for 6 minutes under these conditions during the CCM test.

Possible Causes:



Fuel level sensor signal circuit is shorted to system power
 
Fuel level sensor ground circuit is open
 
Fuel level sender is damaged, binding or not aligned properly
 
PCM has failed
 

Trouble Code: P0463

Fuel Level Sensor High Input

Trouble Code Conditions: Engine started; system voltage over 10.0v and the PCM detected the Fuel Level sensor signal indicated more than 2.90v for 6 minutes under these conditions during the CCM test.

Possible Causes:



Fuel level sensor signal circuit is shorted to system power
 
Fuel level sensor ground circuit is open
 
Fuel level sender is damaged, binding or not aligned properly
 
PCM has failed
 

Trouble Code: P0480

Cooling Fan Relay 1 Control Circuit Malfunction

Trouble Code Conditions: Engine started; system voltage over 10.0v and the PCM detected the Commanded state and Actual state of the Fan Relay 1 control circuit (Low Speed Fan) did not match for 5 seconds.

Possible Causes:



Fan control relay control circuit is open or shorted to ground
 
Fan control relay control circuit is shorted to system power
 
Fan control relay power circuit is open (check Cool Fan 1 fuse)
 
Fan control relay is damaged or has failed
 
PCM has failed
 

Trouble Code: P0480

Cooling Fan Relay 1 Control Circuit Malfunction

Trouble Code Conditions: Engine started; system voltage over 10.0v and the PCM detected the Commanded state and Actual state of the Fan Relay 1 control circuit (Low Speed Fan) did not match for 5 seconds.

Possible Causes:



Fan control relay control circuit is open or shorted to ground
 
Fan control relay control circuit is shorted to system power
 
Fan control relay power circuit is open (check Cool Fan 1 fuse)
 
Fan control relay is damaged or has failed
 
PCM has failed
 

Trouble Code: P0481

Cooling Fan Relay 2-3 Control Circuit Malfunction

Trouble Code Conditions: Engine started; system voltage over 10.0v and the PCM detected the Actual state and the Commanded state of the Cooling Fan Relay 2-3 control circuit did not match for 10 seconds.

Possible Causes:



Fan control relay control circuit is open or shorted to ground
 
Fan control relay control circuit is shorted to system power
 
Fan control relay power circuit is open or shorted to ground
 
Fan control relay is damaged or has failed
 
PCM has failed
 

Trouble Code: P0481

Cooling Fan Relay 2-3 Control Circuit Malfunction

Trouble Code Conditions: Engine started; system voltage over 10.0v and the PCM detected the Actual state and the Commanded state of the Cooling Fan Relay 2-3 control circuit did not match for 10 seconds.

Possible Causes:



Fan control relay control circuit is open or shorted to ground
 
Fan control relay control circuit is shorted to system power
 
Fan control relay power circuit is open or shorted to ground
 
Fan control relay is damaged or has failed
 
PCM has failed
 

Trouble Code: P0500

Vehicle Speed Sensor Circuit Malfunction

Trouble Code Conditions: Engine started; vehicle driven at an engine speed and load that indicate the vehicle is moving in gear for over 2 seconds, and the PCM detected the VSS signal indicated a speed of less than 3 mph for over 20 seconds under these conditions in the CCM test.

Possible Causes:



Output shaft rotor is chipped or damaged
 
Output shaft rotor is not aligned properly with the VSS unit
 
VSS tip contains debris or metal shavings (an intermittent fault)
 
VSS positive (+) signal circuit is open or shorted to ground
 
VSS negative (-) signa
 

Trouble Code: P0500

Vehicle Speed Sensor Circuit Malfunction

Trouble Code Conditions: Engine started; vehicle driven at an engine speed and load that indicate the vehicle is moving in gear for over 2 seconds, and the PCM detected the VSS signal indicated a speed of less than 3 mph for over 20 seconds under these conditions in the CCM test.

Possible Causes:



Output shaft rotor is chipped or damaged
 
Output shaft rotor is not aligned properly with the VSS unit
 
VSS tip contains debris or metal shavings (an intermittent fault)
 
VSS positive (+) signal circuit is open or shorted to ground
 
VSS negative (-) signa
 

Trouble Code: P0502

VSS Circuit Low Input (4L60-E)

Trouble Code Conditions: DTC P0107, P0108, P0121, P0122 and P0123 not set, engine started, not in P/N, vehicle driven to a speed over 2900 rpm, TP angle over 15%, engine torque 40-150 lb ft., and the PCM detected the Output Shaft Speed signal was less than 150 rpm for 3 seconds.

Possible Causes:



Output shaft rotor is chipped or damaged
 
OSS tip contains debris or metal shavings (an intermittent fault)
 
OSS positive (+) signal circuit is open or shorted to ground
 
OSS negative (-) signal circuit is open or shorted to ground
 
OSS is damaged or has
 

Trouble Code: P0502

VSS Circuit Low Input (4L60-E)

Trouble Code Conditions: DTC P0107, P0108, P0121, P0122 and P0123 not set, engine started, not in P/N, vehicle driven to a speed over 2900 rpm, TP angle over 15%, engine torque 40-150 lb ft., and the PCM detected the Output Shaft Speed signal was less than 150 rpm for 3 seconds.

Possible Causes:



Output shaft rotor is chipped or damaged
 
OSS tip contains debris or metal shavings (an intermittent fault)
 
OSS positive (+) signal circuit is open or shorted to ground
 
OSS negative (-) signal circuit is open or shorted to ground
 
OSS is damaged or has
 

Trouble Code: P0503

Vehicle Speed Sensor Signal Intermittent (4L60-E)

Trouble Code Conditions: DTC P1810 not set, engine running, time since last gear change over 6 seconds, not in P/N, and the PCM detected a drop in the VSS output signal of more than 1800 rpm, or with vehicle in P/N, the VSS output speed dropped over 1300 rpm for 3 seconds.

Possible Causes:



Transmission shaft rotor is chipped or damaged (intermittent)
 
VSS tip contains debris or metal shavings (an intermittent fault)
 
VSS (+) or (-) signal circuit is open or shorted to ground
 
VSS is damaged or has failed (an intermittent fault)
 

Trouble Code: P0503

Vehicle Speed Sensor Signal Intermittent (4L60-E)

Trouble Code Conditions: DTC P1810 not set, engine running, time since last gear change over 6 seconds, not in P/N, and the PCM detected a drop in the VSS output signal of more than 1800 rpm, or with vehicle in P/N, the VSS output speed dropped over 1300 rpm for 3 seconds.

Possible Causes:



Transmission shaft rotor is chipped or damaged (intermittent)
 
VSS tip contains debris or metal shavings (an intermittent fault)
 
VSS (+) or (-) signal circuit is open or shorted to ground
 
VSS is damaged or has failed (an intermittent fault)
 

Trouble Code: P0506

Idle Speed Too Low

Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112-P0118, P0171-P0175, P0200-P0206, P0300, P0336, P0401-P0405, P0502, P0503, P1112-P1115, P1120, P1220, P1221, P1374, P1380 and P1381 not set, engine runtime over 2 minutes, ECT and IAT sensors more than -40ºF, BARO senso

Possible Causes:



Air inlet duct is collapsed, loose or air filter element is clogged
 
Base engine problem (i.e., compression or misfire condition)
 
Idle air inlet passage or throttle bore is dirty or full of deposits
 
IAC valve is damaged or has failed
 
MAF sensor is dirt
 

Trouble Code: P0506

Idle Speed Too Low

Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112-P0118, P0171-P0175, P0200-P0206, P0300, P0336, P0401-P0405, P0502, P0503, P1112-P1115, P1120, P1220, P1221, P1374, P1380 and P1381 not set, engine runtime over 2 minutes, ECT and IAT sensors more than -40ºF, BARO senso

Possible Causes:



Air inlet duct is collapsed, loose or air filter element is clogged
 
Base engine problem (i.e., compression or misfire condition)
 
Idle air inlet passage or throttle bore is dirty or full of deposits
 
IAC valve is damaged or has failed
 
MAF sensor is dirt
 

Trouble Code: P0507

Idle Speed Too High

Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112-P0118, P0171-P0175, P0200-P0206, P0300, P0336, P0401-P0405, P0502, P0503, P1112-P1115, P1120, P1220, P1221, P1374, P1380 and P1381 not set, engine runtime over 2 minutes, ECT and IAT sensors more than -40ºF, BARO senso

Possible Causes:



Engine vacuum leaks, PCM valve is leaking or the wrong valve
 
Idle air inlet passage or throttle bore is dirty or full of deposits
 
IAC valve is damaged or has failed
 
MAF sensor is dirty, "skewed" or installed improperly
 
Throttle plate, throttle shaft o
 

Trouble Code: P0507

Idle Speed Too High

Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112-P0118, P0171-P0175, P0200-P0206, P0300, P0336, P0401-P0405, P0502, P0503, P1112-P1115, P1120, P1220, P1221, P1374, P1380 and P1381 not set, engine runtime over 2 minutes, ECT and IAT sensors more than -40ºF, BARO senso

Possible Causes:



Engine vacuum leaks, PCM valve is leaking or the wrong valve
 
Idle air inlet passage or throttle bore is dirty or full of deposits
 
IAC valve is damaged or has failed
 
MAF sensor is dirty, "skewed" or installed improperly
 
Throttle plate, throttle shaft o
 

Trouble Code: P0530

A/C Refrigerant Pressure Sensor Circuit Malfunction

Trouble Code Conditions: Engine running with A/C requested "on", and the PCM detected the A/C Pressure sensor was less than 0.10v (9 psi) or it was more than 4.88v (448 kPa) for 5 seconds during the test.

Possible Causes:



ACP sensor signal circuit is open or shorted to ground
 
ACP sensor signal circuit is shorted to VREF or system power
 
ACP sensor ground circuit is open
 
ACP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0530

A/C Refrigerant Pressure Sensor Circuit Malfunction

Trouble Code Conditions: Engine running with A/C requested "on", and the PCM detected the A/C Pressure sensor was less than 0.10v (9 psi) or it was more than 4.88v (448 kPa) for 5 seconds during the test.

Possible Causes:



ACP sensor signal circuit is open or shorted to ground
 
ACP sensor signal circuit is shorted to VREF or system power
 
ACP sensor ground circuit is open
 
ACP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0560

System Voltage Malfunction

Trouble Code Conditions: Engine started, engine running and the PCM detected the system voltage was less than 10v or more than 16v for over 2 seconds.

Possible Causes:



Check for high resistance at the battery connections or at the GAGES fuse power circuit connection to the PCM
 
Check the drive belt for excessive wear and the proper tension
 
Check the condition of the battery and the Generator output
 
Vehicle may have be
 

Trouble Code: P0560

System Voltage Malfunction

Trouble Code Conditions: Engine started, engine running and the PCM detected the system voltage was less than 10v or more than 16v for over 2 seconds.

Possible Causes:



Check for high resistance at the battery connections or at the GAGES fuse power circuit connection to the PCM
 
Check the drive belt for excessive wear and the proper tension
 
Check the condition of the battery and the Generator output
 
Vehicle may have be
 

Trouble Code: P0601

Control Module ROM Malfunction

Trouble Code Conditions: Key in crank or the run position, and the PCM detected more than 3 incorrect checksums during its initial self-test. The PCM uses an EEPROM to store software and calibration data. The PCM uses a checksum to verify the integrity of the information. At the

Possible Causes:



The PCM must be replaced to correct this problem. A new PCM must be programmed with the correct software/calibration.
 
TSB 67-65-23 contains a repair procedure for this code
 

Trouble Code: P0601

Control Module ROM Malfunction

Trouble Code Conditions: Key in crank or the run position, and the PCM detected more than 3 incorrect checksums during its initial self-test. The PCM uses an EEPROM to store software and calibration data. The PCM uses a checksum to verify the integrity of the information. At the

Possible Causes:



The PCM must be replaced to correct this problem. A new PCM must be programmed with the correct software/calibration.
 
TSB 67-65-23 contains a repair procedure for this code
 

Trouble Code: P0602

Control Module Not Programmed

Trouble Code Conditions: Key on, and the PCM detected it did not have the correct program to operate or that the EEPROM had been programmed incorrectly.

Possible Causes:



Reprogram the PCM with the correct software and calibration. If this step does not correct the problem, the PCM must be replaced and programmed with the correct software/calibration.
 

Trouble Code: P0602

Control Module Not Programmed

Trouble Code Conditions: Key on, and the PCM detected it did not have the correct program to operate or that the EEPROM had been programmed incorrectly.

Possible Causes:



Reprogram the PCM with the correct software and calibration. If this step does not correct the problem, the PCM must be replaced and programmed with the correct software/calibration.
 

Trouble Code: P0603

Control Module Long Term Memory Reset

Trouble Code Conditions: DTC P0604 not set, and then with the key on, the PCM detected the calculated checksum that did not match the previous checksum.

Possible Causes:



An interruption to the PCM main power and/or ground circuits
 
Check the PCM power and ground circuits and make repairs as necessary. Clear the codes and recheck. If it resets, the PCM must be replaced and programmed with the correct software.
 

Trouble Code: P0603

Control Module Long Term Memory Reset

Trouble Code Conditions: DTC P0604 not set, and then with the key on, the PCM detected the calculated checksum that did not match the previous checksum.

Possible Causes:



An interruption to the PCM main power and/or ground circuits
 
Check the PCM power and ground circuits and make repairs as necessary. Clear the codes and recheck. If it resets, the PCM must be replaced and programmed with the correct software.
 

Trouble Code: P0604

Control Module Random Access Memory Failure

Trouble Code Conditions: Key on for 5 seconds, and the PCM detected the internal data test of its RAM failed. The PCM copies the program information stored in the RAM. This allows the PCM to work with, and make any updates to this data. The PCM checks for problems in all areas of

Possible Causes:



The PCM must be replaced to correct this problem. A new PCM must be programmed with the correct software/calibration.
 

Trouble Code: P0604

Control Module Random Access Memory Failure

Trouble Code Conditions: Key on for 5 seconds, and the PCM detected the internal data test of its RAM failed. The PCM copies the program information stored in the RAM. This allows the PCM to work with, and make any updates to this data. The PCM checks for problems in all areas of

Possible Causes:



The PCM must be replaced to correct this problem. A new PCM must be programmed with the correct software/calibration.
 

Trouble Code: P0606

Control Module Internal Performance

Trouble Code Conditions: DTC P0601 and P0604 not set, key on, and the PCM determined that an internal performance problem existed within its controller.

Possible Causes:



The PCM must be replaced to correct this problem. A new PCM must be programmed with the correct software/calibration.
 

Trouble Code: P0606

Control Module Internal Performance

Trouble Code Conditions: DTC P0601 and P0604 not set, key on, and the PCM determined that an internal performance problem existed within its controller.

Possible Causes:



The PCM must be replaced to correct this problem. A new PCM must be programmed with the correct software/calibration.
 

Trouble Code: P0607

Control Module Performance

Trouble Code Conditions: Key on or engine running; then after the initial PCM power up sequence, the PCM detected an internal performance problem.

Possible Causes:



The PCM must be replaced to correct this problem. A new PCM must be programmed with the correct software/calibration.
 

Trouble Code: P0607

Control Module Performance

Trouble Code Conditions: Key on or engine running; then after the initial PCM power up sequence, the PCM detected an internal performance problem.

Possible Causes:



The PCM must be replaced to correct this problem. A new PCM must be programmed with the correct software/calibration.
 

Trouble Code: P0704

Clutch Switch Circuit Malfunction (M49/MM6)

Trouble Code Conditions: DTC P0500, P0502 and P0503 not set, engine started, engine load and vehicle acceleration indicate vehicle is in gear and moving, and the PCM detected a VSS signal indicating the vehicle went from 0 to over 24 mph and then back to 0 mph within 2 seconds wi

Possible Causes:



Clutch switch circuit is open, shorted to ground or to power
 
Clutch switch power circuit is open (test the ENG IGN fuse)
 
Clutch switch is out of adjustment, damaged or has failed
 
PCM has failed
 

Trouble Code: P0704

Clutch Switch Circuit Malfunction (M49/MM6)

Trouble Code Conditions: DTC P0500, P0502 and P0503 not set, engine started, engine load and vehicle acceleration indicate vehicle is in gear and moving, and the PCM detected a VSS signal indicating the vehicle went from 0 to over 24 mph and then back to 0 mph within 2 seconds wi

Possible Causes:



Clutch switch circuit is open, shorted to ground or to power
 
Clutch switch power circuit is open (test the ENG IGN fuse)
 
Clutch switch is out of adjustment, damaged or has failed
 
PCM has failed
 

Trouble Code: P1106

MAP Sensor Circuit Intermittent High Input

Trouble Code Conditions: DTC P0606, P1120, P1125, P1220, P1221, P1271-P1276, P1280, P1281-P1286 or P1514-P1517 not set, engine runtime determined by ECT input at startup (up to 2 minutes at less than -22ºF to less than 12 seconds at more than 86ºF), TP angle under 0.5% with engin

Possible Causes:



MAP sensor signal circuit is shorted to VREF (intermittent fault)
 
MAP sensor ground circuit is open (intermittent fault)
 
MAP sensor is damaged or has failed (intermittent fault)
 
PCM has failed
 

Trouble Code: P1106

MAP Sensor Circuit Intermittent High Input

Trouble Code Conditions: DTC P0606, P1120, P1125, P1220, P1221, P1271-P1276, P1280, P1281-P1286 or P1514-P1517 not set, engine runtime determined by ECT input at startup (up to 2 minutes at less than -22ºF to less than 12 seconds at more than 86ºF), TP angle under 0.5% with engin

Possible Causes:



MAP sensor signal circuit is shorted to VREF (intermittent fault)
 
MAP sensor ground circuit is open (intermittent fault)
 
MAP sensor is damaged or has failed (intermittent fault)
 
PCM has failed
 

Trouble Code: P1107

MAP Sensor Circuit Intermittent Low Input

Trouble Code Conditions: DTC P0606, P1120, P1125, P1220, P1221, P1271-P1276, P1280, P1281-P1286, P1514 and P1517 not set, engine started, engine runtime 1-2 minutes (depends on the ECT sensor at startup), TP angle over 0% with engine speed under1000 rpm or TP angle over 10% with

Possible Causes:



MAP sensor signal circuit shorted to ground (intermittent fault)
 
MAP sensor VREF circuit is open (intermittent fault)
 
MAP sensor is damaged or has failed (intermittent fault)
 
PCM has failed
 

Trouble Code: P1107

MAP Sensor Circuit Intermittent Low Input

Trouble Code Conditions: DTC P0606, P1120, P1125, P1220, P1221, P1271-P1276, P1280, P1281-P1286, P1514 and P1517 not set, engine started, engine runtime 1-2 minutes (depends on the ECT sensor at startup), TP angle over 0% with engine speed under1000 rpm or TP angle over 10% with

Possible Causes:



MAP sensor signal circuit shorted to ground (intermittent fault)
 
MAP sensor VREF circuit is open (intermittent fault)
 
MAP sensor is damaged or has failed (intermittent fault)
 
PCM has failed
 

Trouble Code: P1111

IAT Sensor Circuit Intermittent High Input

Trouble Code Conditions: DTC P0101-P0103, P0116-P0118, P0125, P0128, P0502, P0503, P1114 and P1115 not set, engine started, engine runtime over 3 minutes, VSS under 35 mph, MAF sensor less than 12 g/sec, ECT sensor more than 140ºF, and the PCM detected an intermittent high voltag

Possible Causes:



IAT sensor signal circuit is open (intermittent fault)
 
IAT sensor ground circuit is open (intermittent fault)
 
IAT sensor is damaged (an intermittent "open" condition)
 
PCM has failed
 

Trouble Code: P1111

IAT Sensor Circuit Intermittent High Input

Trouble Code Conditions: DTC P0101-P0103, P0116-P0118, P0125, P0128, P0502, P0503, P1114 and P1115 not set, engine started, engine runtime over 3 minutes, VSS under 35 mph, MAF sensor less than 12 g/sec, ECT sensor more than 140ºF, and the PCM detected an intermittent high voltag

Possible Causes:



IAT sensor signal circuit is open (intermittent fault)
 
IAT sensor ground circuit is open (intermittent fault)
 
IAT sensor is damaged (an intermittent "open" condition)
 
PCM has failed
 

Trouble Code: P1112

IAT Sensor Circuit Intermittent Low Input

Trouble Code Conditions: DTC P0101-P0103, P0116-P0118, P0125, P0128, P0502, P0503, P1114 and P1115 not set, engine runtime over 3 minutes, VSS under 35 mph, MAF sensor less than 12 g/sec, ECT sensor more than 140ºF, and the PCM detected an intermittent low voltage condition (Scan

Possible Causes:



IAT sensor signal circuit is shorted to ground (intermittent fault)
 
IAT sensor is damaged (an intermittent "shorted" condition)
 
PCM has failed
 

Trouble Code: P1112

IAT Sensor Circuit Intermittent Low Input

Trouble Code Conditions: DTC P0101-P0103, P0116-P0118, P0125, P0128, P0502, P0503, P1114 and P1115 not set, engine runtime over 3 minutes, VSS under 35 mph, MAF sensor less than 12 g/sec, ECT sensor more than 140ºF, and the PCM detected an intermittent low voltage condition (Scan

Possible Causes:



IAT sensor signal circuit is shorted to ground (intermittent fault)
 
IAT sensor is damaged (an intermittent "shorted" condition)
 
PCM has failed
 

Trouble Code: P1114

ECT Sensor Circuit Intermittent Low Input

Trouble Code Conditions: Engine started, engine runtime over 5 seconds, and the PCM detected an intermittent low voltage condition on the ECT sensor signal circuit (Scan Tool reads over 284ºF) for 5 seconds.

Possible Causes:



ECT sensor signal circuit shorted to ground (intermittent fault)
 
ECT sensor has failed (possible intermittent shorted condition)
 
PCM has failed
 

Trouble Code: P1114

ECT Sensor Circuit Intermittent Low Input

Trouble Code Conditions: Engine started, engine runtime over 5 seconds, and the PCM detected an intermittent low voltage condition on the ECT sensor signal circuit (Scan Tool reads over 284ºF) for 5 seconds.

Possible Causes:



ECT sensor signal circuit shorted to ground (intermittent fault)
 
ECT sensor has failed (possible intermittent shorted condition)
 
PCM has failed
 

Trouble Code: P1115

ECT Sensor Circuit Intermittent High Input

Trouble Code Conditions: Engine runtime over 5 seconds and the PCM detected an intermittent high voltage condition on the ECT sensor signal circuit (Scan Tool reads less than -31ºF) for 3 seconds. When the ECT sensor is cold, its resistance is high. As the engine coolant temperat

Possible Causes:



ECT sensor signal circuit is open between the sensor and PCM
 
ECT sensor ground circuit is open between sensor and PCM
 
ECT sensor has failed (possible intermittent "open" condition)
 
PCM has failed
 

Trouble Code: P1115

ECT Sensor Circuit Intermittent High Input

Trouble Code Conditions: Engine runtime over 5 seconds and the PCM detected an intermittent high voltage condition on the ECT sensor signal circuit (Scan Tool reads less than -31ºF) for 3 seconds. When the ECT sensor is cold, its resistance is high. As the engine coolant temperat

Possible Causes:



ECT sensor signal circuit is open between the sensor and PCM
 
ECT sensor ground circuit is open between sensor and PCM
 
ECT sensor has failed (possible intermittent "open" condition)
 
PCM has failed
 

Trouble Code: P1120

TP Sensor 1 Circuit Malfunction

Trouble Code Conditions: DTC P0606, P1517 and P1518 not set, key in crank or run mode, ETC serial data circuit operational, and the PCM detected the TP Sensor 1 signal was less than 0.34v or more than 4.40v. If the TAC module detects a condition within the ETC system, the PCM may

Possible Causes:



TP1 sensor signal circuit is open, shorted to ground or to power
 
TP1 sensor low reference circuit has high resistance condition
 
TP1 sensor is damaged or has failed
 

Trouble Code: P1120

TP Sensor 1 Circuit Malfunction

Trouble Code Conditions: DTC P0606, P1517 and P1518 not set, key in crank or run mode, ETC serial data circuit operational, and the PCM detected the TP Sensor 1 signal was less than 0.34v or more than 4.40v. If the TAC module detects a condition within the ETC system, the PCM may

Possible Causes:



TP1 sensor signal circuit is open, shorted to ground or to power
 
TP1 sensor low reference circuit has high resistance condition
 
TP1 sensor is damaged or has failed
 

Trouble Code: P1133

HO2S-11 (Bank 1 Sensor 1) Insufficient Switching

Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0121-P0123, P0125, P0128, P0201-P0206, P0300, P0410, P0440, P0442, P0443, P0446, P0449 and P1441 not set, DTC P0101-P0103, P0107-P0108, P0112-P0113, P0117-P0118, P0121-P0123, P0125, P0128, P0201-

Possible Causes:



Air leaks present in the exhaust manifold or the exhaust pipes
 
Fuel pressure is too high (i.e., causing a rich air fuel mixture)
 
HO2S may be contaminated (due to improper fuel or silicone)
 
HO2S signal high or low reference circuit has high resistance
 

Trouble Code: P1133

HO2S-11 (Bank 1 Sensor 1) Insufficient Switching

Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0121-P0123, P0125, P0128, P0201-P0206, P0300, P0410, P0440, P0442, P0443, P0446, P0449 and P1441 not set, DTC P0101-P0103, P0107-P0108, P0112-P0113, P0117-P0118, P0121-P0123, P0125, P0128, P0201-

Possible Causes:



Air leaks present in the exhaust manifold or the exhaust pipes
 
Fuel pressure is too high (i.e., causing a rich air fuel mixture)
 
HO2S may be contaminated (due to improper fuel or silicone)
 
HO2S signal high or low reference circuit has high resistance
 

Trouble Code: P1134

HO2S-11 (Bank 1 Sensor 1) Transition Time Ratio

Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0121-P0123, P0125, P0128, P0201-P0206, P0300, P0410, P0440, P0442, P0443, P0446, P0449 and P1441 not set, DTC P0101-P0103, P0107-P0108, P0112-P0113, P0117-P0118, P0121-P0123, P0125, P0128, P0201-

Possible Causes:



Air leaks present in the exhaust manifold or the exhaust pipes
 
Fuel pressure is too high (i.e., causing a rich air fuel mixture)
 
HO2S may be contaminated (due to improper fuel or silicone)
 
HO2S signal high or low reference circuit has high resistance
 

Trouble Code: P1134

HO2S-11 (Bank 1 Sensor 1) Transition Time Ratio

Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0121-P0123, P0125, P0128, P0201-P0206, P0300, P0410, P0440, P0442, P0443, P0446, P0449 and P1441 not set, DTC P0101-P0103, P0107-P0108, P0112-P0113, P0117-P0118, P0121-P0123, P0125, P0128, P0201-

Possible Causes:



Air leaks present in the exhaust manifold or the exhaust pipes
 
Fuel pressure is too high (i.e., causing a rich air fuel mixture)
 
HO2S may be contaminated (due to improper fuel or silicone)
 
HO2S signal high or low reference circuit has high resistance
 

Trouble Code: P1153

HO2S-21 (Bank 2 Sensor 1) Insufficient Switching

Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0121-P0123, P0125, P0128, P0201-P0206, P0300, P0410, P0440, P0442, P0443, P0446, P0449 and P1441 not set, DTC P0101-P0103, P0107-P0108, P0112-P0113, P0117-P0118, P0121-P0123, P0125, P0128, P0201-

Possible Causes:



Air leaks present in the exhaust manifold or the exhaust pipes
 
Fuel pressure is too high (i.e., causing a rich air fuel mixture)
 
HO2S may be contaminated (due to improper fuel or silicone)
 
HO2S signal high or low reference circuit has high resistance
 

Trouble Code: P1153

HO2S-21 (Bank 2 Sensor 1) Insufficient Switching

Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0121-P0123, P0125, P0128, P0201-P0206, P0300, P0410, P0440, P0442, P0443, P0446, P0449 and P1441 not set, DTC P0101-P0103, P0107-P0108, P0112-P0113, P0117-P0118, P0121-P0123, P0125, P0128, P0201-

Possible Causes:



Air leaks present in the exhaust manifold or the exhaust pipes
 
Fuel pressure is too high (i.e., causing a rich air fuel mixture)
 
HO2S may be contaminated (due to improper fuel or silicone)
 
HO2S signal high or low reference circuit has high resistance
 

Trouble Code: P1154

HO2S-21 (Bank 2 Sensor 1) Transition Time Ratio

Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0121-P0123, P0125, P0128, P0201-P0206, P0300, P0410, P0440, P0442, P0443, P0446, P0449 and P1441 not set, DTC P0101-P0103, P0107-P0108, P0112-P0113, P0117-P0118, P0121-P0123, P0125, P0128, P0201-

Possible Causes:



Air leaks present in the exhaust manifold or the exhaust pipes
 
Fuel pressure is too high (i.e., causing a rich air fuel mixture)
 
HO2S may be contaminated (due to improper fuel or silicone)
 
HO2S signal high or low reference circuit has high resistance
 

Trouble Code: P1154

HO2S-21 (Bank 2 Sensor 1) Transition Time Ratio

Trouble Code Conditions: DTC P0101-P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0121-P0123, P0125, P0128, P0201-P0206, P0300, P0410, P0440, P0442, P0443, P0446, P0449 and P1441 not set, DTC P0101-P0103, P0107-P0108, P0112-P0113, P0117-P0118, P0121-P0123, P0125, P0128, P0201-

Possible Causes:



Air leaks present in the exhaust manifold or the exhaust pipes
 
Fuel pressure is too high (i.e., causing a rich air fuel mixture)
 
HO2S may be contaminated (due to improper fuel or silicone)
 
HO2S signal high or low reference circuit has high resistance
 

Trouble Code: P1271

Accelerator Pedal Position Sensor 1-2 Correlation

Trouble Code Conditions: DTC P0606, P1275, P1280, P1517, P1518, P1635, P1639, P1776 and P1781 not set, key in crank or run position, ETC serial data operating, and the PCM detected the APP1 and APP 2 disagreed by over 10.5%, or the APP1 circuit was shorted to the APP2 circuit. Th

Possible Causes:



When the TAC module detects a fault in the ETC system, the PCM receives a message on the serial data line. More than one related code might set because of the many redundant tests run continuously on this system. Locating and repairing a single condition
 

Trouble Code: P1271

Accelerator Pedal Position Sensor 1-2 Correlation

Trouble Code Conditions: DTC P0606, P1275, P1280, P1517, P1518, P1635, P1639, P1776 and P1781 not set, key in crank or run position, ETC serial data operating, and the PCM detected the APP1 and APP 2 disagreed by over 10.5%, or the APP1 circuit was shorted to the APP2 circuit. Th

Possible Causes:



When the TAC module detects a fault in the ETC system, the PCM receives a message on the serial data line. More than one related code might set because of the many redundant tests run continuously on this system. Locating and repairing a single condition
 

Trouble Code: P1272

Accelerator Pedal Position Sensor 2-3 Correlation

Trouble Code Conditions: DTC P0606, P1517, P1518, P1281 or P1286 not set, key in crank or run position, and the PCM detected the APP sensor 1 disagreed with the APP sensor 3 signal by more than 10.5%, or the APP sensor 1 was shorted to the APP sensor 3 signal. The APP sensors are

Possible Causes:



When the TAC module detects a fault in the ETC system, the PCM receives a message on the serial data line. More than one related code might set because of the many redundant tests run continuously on this system. Locating and repairing a single condition
 

Trouble Code: P1272

Accelerator Pedal Position Sensor 2-3 Correlation

Trouble Code Conditions: DTC P0606, P1517, P1518, P1281 or P1286 not set, key in crank or run position, and the PCM detected the APP sensor 1 disagreed with the APP sensor 3 signal by more than 10.5%, or the APP sensor 1 was shorted to the APP sensor 3 signal. The APP sensors are

Possible Causes:



When the TAC module detects a fault in the ETC system, the PCM receives a message on the serial data line. More than one related code might set because of the many redundant tests run continuously on this system. Locating and repairing a single condition
 

Trouble Code: P1273

Accelerator Pedal Position Sensor 1-3 Correlation

Trouble Code Conditions: DTC P0606, P1517, P1518, P1276 or P1286 not set, key in crank or run position, and the PCM detected the APP sensor 2 disagreed with the APP sensor 3 signal by more than 10.5%, or the APP sensor 2 was shorted to the APP sensor 3 signal. The APP sensors are

Possible Causes:



When the TAC module detects a fault in the ETC system, the PCM receives a message on the data bus. More than 1 trouble code might set due to the many redundant tests that run.
 
Refer to any other related TAC system trouble codes. If there are no other TAC
 

Trouble Code: P1273

Accelerator Pedal Position Sensor 1-3 Correlation

Trouble Code Conditions: DTC P0606, P1517, P1518, P1276 or P1286 not set, key in crank or run position, and the PCM detected the APP sensor 2 disagreed with the APP sensor 3 signal by more than 10.5%, or the APP sensor 2 was shorted to the APP sensor 3 signal. The APP sensors are

Possible Causes:



When the TAC module detects a fault in the ETC system, the PCM receives a message on the data bus. More than 1 trouble code might set due to the many redundant tests that run.
 
Refer to any other related TAC system trouble codes. If there are no other TAC
 

Trouble Code: P1275

Accelerator Pedal Position Sensor 1 Circuit Malfunction

Trouble Code Conditions: DTC P0606, P1517 and P1518 not set, key in run or crank mode, system voltage over 5.23v, and the PCM detected the APP Sensor 1 signal was less than 0.68v or more than 4.50v for 1 second. Note: Refer to the information in the Failure Records as needed.

Possible Causes:



When the TAC module detects a fault in this system, the PCM receives a message on the data bus. One or more related codes might set because of the many redundant tests that run.
 
Refer to any other related TAC system trouble codes. If there are no other T
 

Trouble Code: P1275

Accelerator Pedal Position Sensor 1 Circuit Malfunction

Trouble Code Conditions: DTC P0606, P1517 and P1518 not set, key in run or crank mode, system voltage over 5.23v, and the PCM detected the APP Sensor 1 signal was less than 0.68v or more than 4.50v for 1 second. Note: Refer to the information in the Failure Records as needed.

Possible Causes:



When the TAC module detects a fault in this system, the PCM receives a message on the data bus. One or more related codes might set because of the many redundant tests that run.
 
Refer to any other related TAC system trouble codes. If there are no other T
 

Trouble Code: P1336

CKP Sensor System Variation Not Learned

Trouble Code Conditions: DTC P0336, P0341and P1374 not set, engine started, ECT sensor more than 158ºF, and the PCM did not detect any CKP variation values. The Crankshaft Position system variation-learning feature is used to calculate reference period errors caused by slight tol

Possible Causes:



Set the parking brake and block the drive wheels for safety.
 
Verify the hood is closed.
 
Read the trouble codes. If a code is set, refer to that code.
 
Start the engine. Allow engine temperature to reach at least 158ºF (70ºC). Then key off.
 
Select Crank
 

Trouble Code: P1336

CKP Sensor System Variation Not Learned

Trouble Code Conditions: DTC P0336, P0341and P1374 not set, engine started, ECT sensor more than 158ºF, and the PCM did not detect any CKP variation values. The Crankshaft Position system variation-learning feature is used to calculate reference period errors caused by slight tol

Possible Causes:



Set the parking brake and block the drive wheels for safety.
 
Verify the hood is closed.
 
Read the trouble codes. If a code is set, refer to that code.
 
Start the engine. Allow engine temperature to reach at least 158ºF (70ºC). Then key off.
 
Select Crank
 

Trouble Code: P1351

ICM Ignition Control Circuit High Input

Trouble Code Conditions: Engine speed over 600 rpm, and the PCM detected an unexpected voltage condition on the ICM Control circuit for at least 300 3X reference periods (100 crankshaft revolutions).

Possible Causes:



IC signal circuit is open
 
IC module has failed
 
PCM has failed
 

Trouble Code: P1351

ICM Ignition Control Circuit High Input

Trouble Code Conditions: Engine speed over 600 rpm, and the PCM detected an unexpected voltage condition on the ICM Control circuit for at least 300 3X reference periods (100 crankshaft revolutions).

Possible Causes:



IC signal circuit is open
 
IC module has failed
 
PCM has failed
 

Trouble Code: P1352

ICM Signal Circuit High Input

Trouble Code Conditions: Engine started and the PCM detected an unexpected voltage condition on the ICM signal circuit for at least 300 3X reference periods (100 crankshaft revolutions). The ICM has independent power and ground circuits that connect to the PCM. They are the IC ti

Possible Causes:



ICM signal circuit is open
 
ICM unit is damaged or it has failed
 
PCM has failed
 

Trouble Code: P1352

ICM Signal Circuit High Input

Trouble Code Conditions: Engine started and the PCM detected an unexpected voltage condition on the ICM signal circuit for at least 300 3X reference periods (100 crankshaft revolutions). The ICM has independent power and ground circuits that connect to the PCM. They are the IC ti

Possible Causes:



ICM signal circuit is open
 
ICM unit is damaged or it has failed
 
PCM has failed
 

Trouble Code: P1361

ICM Ignition Control Circuit Low Input

Trouble Code Conditions: Engine started, and the PCM did not detect any ICM ignition control (IC) pulses after the IC mode spark advance was commanded "on". These circuits include the Ignition Control (IC) timing signal, IC timing control signal, low-resolution engine speed signa

Possible Causes:



IC timing signal circuit is shorted to ground or shorted to power
 
IC timing control circuit is shorted to ground or shorted to power
 
IC module has failed
 
PCM has failed
 

Trouble Code: P1361

ICM Ignition Control Circuit Low Input

Trouble Code Conditions: Engine started, and the PCM did not detect any ICM ignition control (IC) pulses after the IC mode spark advance was commanded "on". These circuits include the Ignition Control (IC) timing signal, IC timing control signal, low-resolution engine speed signa

Possible Causes:



IC timing signal circuit is shorted to ground or shorted to power
 
IC timing control circuit is shorted to ground or shorted to power
 
IC module has failed
 
PCM has failed
 

Trouble Code: P1380

EBTCM DTC Detected, Rough Road Data Unusable

Trouble Code Conditions: DTC P0101-P0103, P0121-P0123, P0335, P0336, P0742, P1120, P1121, P1220 and P1221 not set, vehicle speed over 10 mph at an engine speed under 3200 rpm (under 5000 rpm on 3.8L VIN K), engine load less than 60%, DTC P0300 set with the MIL requested "on", and

Possible Causes:



Service the ABS before diagnosing a misfire because an actual engine misfire may or may not exist. Also, an actual engine misfire may have occurred during an ABS fault.
 
Determine if the vehicle was driven on a rough road, and the ABS could not detect thi
 

Trouble Code: P1380

EBTCM DTC Detected, Rough Road Data Unusable

Trouble Code Conditions: DTC P0101-P0103, P0121-P0123, P0335, P0336, P0742, P1120, P1121, P1220 and P1221 not set, vehicle speed over 10 mph at an engine speed under 3200 rpm (under 5000 rpm on 3.8L VIN K), engine load less than 60%, DTC P0300 set with the MIL requested "on", and

Possible Causes:



Service the ABS before diagnosing a misfire because an actual engine misfire may or may not exist. Also, an actual engine misfire may have occurred during an ABS fault.
 
Determine if the vehicle was driven on a rough road, and the ABS could not detect thi
 

Trouble Code: P1381

Misfire Detected - No Communication With The EBCM

Trouble Code Conditions: Engine started, vehicle driven to over 10 mph at an engine speed under 3200 (5000 rpm on VIN K) at an engine load less than 60%, Misfire code (DTC P0300) set with MIL requested "on", and the PCM detected a loss of communication with the EBCM for 20 second

Possible Causes:



Verify with a Scan Tool that the EBCM can transmit serial data on the Class 2 serial data circuit. Service the EBCM as needed before diagnosing a misfire because an actual engine misfire may or may not exist. An engine misfire may have occurred during a p
 

Trouble Code: P1381

Misfire Detected - No Communication With The EBCM

Trouble Code Conditions: Engine started, vehicle driven to over 10 mph at an engine speed under 3200 (5000 rpm on VIN K) at an engine load less than 60%, Misfire code (DTC P0300) set with MIL requested "on", and the PCM detected a loss of communication with the EBCM for 20 second

Possible Causes:



Verify with a Scan Tool that the EBCM can transmit serial data on the Class 2 serial data circuit. Service the EBCM as needed before diagnosing a misfire because an actual engine misfire may or may not exist. An engine misfire may have occurred during a p
 

Trouble Code: P1441

EVAP System Flow During Non-Purge

Trouble Code Conditions: DTC P0107, P0108, P0112, P0113, P0116-P0118, P0125, P0440-P0449, P0452, P0453, P1106, P1107, P1112-P1115, P1120, P1220 and P1221 not set, engine started, ECT and IAT sensors from 39-86ºF and within 16ºF at startup, BARO more than 75 kPa, system voltage ov

Possible Causes:



An improperly installed or damaged EVAP canister purge valve
 
A temporary blockage in the EVAP canister purge valve, purge pipe, or EVAP canister could cause an intermittent condition
 
FTP sensor is out-of-calibration, damaged or "skewed"
 
Purge solenoid
 

Trouble Code: P1441

EVAP System Flow During Non-Purge

Trouble Code Conditions: DTC P0107, P0108, P0112, P0113, P0116-P0118, P0125, P0440-P0449, P0452, P0453, P1106, P1107, P1112-P1115, P1120, P1220 and P1221 not set, engine started, ECT and IAT sensors from 39-86ºF and within 16ºF at startup, BARO more than 75 kPa, system voltage ov

Possible Causes:



An improperly installed or damaged EVAP canister purge valve
 
A temporary blockage in the EVAP canister purge valve, purge pipe, or EVAP canister could cause an intermittent condition
 
FTP sensor is out-of-calibration, damaged or "skewed"
 
Purge solenoid
 

Trouble Code: P1514

Throttle Body Performance

Trouble Code Conditions: DTC P0601, P0602, P0606, P1515, P1516, P1517 and P1518 not set, P1120, P1220 and P1221 not active at the time this code set, or P1120 and P1220 not set at the same time, engine speed over 500 rpm, and the PCM detected the difference between Actual (MAF) a

Possible Causes:



Inspect the throttle blade for damage and/or proper installation
 
Inspect the TAC module connectors for signs of water intrusion. When water intrusion occurs, multiple codes can set with no circuit or component faults apparent during diagnostic testing.
 

Trouble Code: P1515

Control Module Throttle Actuator Position Performance

Trouble Code Conditions: DTC P0601, P0602, P0606, P1515, P1516, P1517 and P1518 not set, P1120, P1220 and P1221 not active at the time this code set, or P1120 and P1220 not set at the same time, key in crank or run mode, ETC or TAC system not in Battery Saver Mode, and the PCM de

Possible Causes:



Throttle actuator motor CKT 1 is open, shorted to ground or B+
 
Throttle actuator motor CKT 2 is open, shorted to ground or B+
 
Throttle actuator motor is damaged or has failed
 
Throttle actuator motor control module has failed
 
TSB 00-06-04-035 contains
 

Trouble Code: P1516

TAC Module Throttle Actuator Position Performance

Trouble Code Conditions: DTC P1518 not set, key in crank or run mode, ETC or TAC system not in Battery Saver Mode, then the ETC/TAC module detected the predicted and actual throttle positions were not within a calibrated range of each other or the PCM and ETC/TAC could not determ

Possible Causes:



TAC motor CKT 1 or CKT 2 is open, shorted to ground or B+
 
Throttle actuator motor CKT 1 is shorted to CKT 2
 
Throttle actuator motor control module has failed
 
TSB 03-04-06-034 contains a repair procedure for this code
 

Trouble Code: P1517

Throttle Actuator Control Module Performance

Trouble Code Conditions: DTC P1518 not set, key in the crank or run mode, system voltage over 5.23v, and the ETC or TAC module detected that an internal data test failed (did not pass) for a time period of less than 1 second.

Possible Causes:



Test the charging system output (low voltage can set this code)
 
Inspect the TAC module connectors for signs of water intrusion. If water intrusion occurs, multiple codes may set without any circuit or component conditions found during diagnostic testing.
 

Trouble Code: P1517

Throttle Actuator Control Module Performance

Trouble Code Conditions: DTC P1518 not set, key in the crank or run mode, system voltage over 5.23v, and the ETC or TAC module detected that an internal data test failed (did not pass) for a time period of less than 1 second.

Possible Causes:



Test the charging system output (low voltage can set this code)
 
Inspect the TAC module connectors for signs of water intrusion. If water intrusion occurs, multiple codes may set without any circuit or component conditions found during diagnostic testing.
 

Trouble Code: P1518

Throttle Actuator Control Module Serial Data Malfunction

Trouble Code Conditions: Key in the crank or run mode, system voltage over 5.23v, and the ETC or TAC module detected invalid or missing serial data present for a specified amount of time, condition met for less than 1 second.

Possible Causes:



DTC P1518 sets if the battery voltage is low. If the customer's concern is slow cranking or no crank due to low battery voltage, ignore the DTC P1518. Clear codes and retest.
 
DTC P1518 also sets when there is a short to B+ on the TAC module ground circui
 

Trouble Code: P1518

Throttle Actuator Control Module Serial Data Malfunction

Trouble Code Conditions: Key in the crank or run mode, system voltage over 5.23v, and the ETC or TAC module detected invalid or missing serial data present for a specified amount of time, condition met for less than 1 second.

Possible Causes:



DTC P1518 sets if the battery voltage is low. If the customer's concern is slow cranking or no crank due to low battery voltage, ignore the DTC P1518. Clear codes and retest.
 
DTC P1518 also sets when there is a short to B+ on the TAC module ground circui
 

Trouble Code: P1519

Throttle Actuator Control Module Range/Performance

Trouble Code Conditions: DTC P0606, P1517 and P1518 not set, key in crank or run position, and the PCM received a message that the AC module had detected an invalid signal from the high-resolution TP sensor. The TP Sensor 1 signal connects to a 5X multiplier to produce a high-res

Possible Causes:



APP sensor assembly is damaged or has failed. It must be replaced to properly repair this trouble code.
 

Trouble Code: P1519

Throttle Actuator Control Module Range/Performance

Trouble Code Conditions: DTC P0606, P1517 and P1518 not set, key in crank or run position, and the PCM received a message that the AC module had detected an invalid signal from the high-resolution TP sensor. The TP Sensor 1 signal connects to a 5X multiplier to produce a high-res

Possible Causes:



APP sensor assembly is damaged or has failed. It must be replaced to properly repair this trouble code.
 

Trouble Code: P1523

TAC Module Return Range/Performance

Trouble Code Conditions: DTC P1518 not set, then with the key on and engine off, system voltage over 8.5v, Battery Saver Mode is active, the TAC module detected the Actual and Commanded throttle positions were not within a calibrated range of each other during the CCM test. Durin

Possible Causes:



Check for mechanical problems or binding that are temperature related. Components do not move freely in extreme heat or cold due to the presence of contaminants or ice.
 
Throttle body assembly is damaged or has failed
 

Trouble Code: P1523

TAC Module Return Range/Performance

Trouble Code Conditions: DTC P1518 not set, then with the key on and engine off, system voltage over 8.5v, Battery Saver Mode is active, the TAC module detected the Actual and Commanded throttle positions were not within a calibrated range of each other during the CCM test. Durin

Possible Causes:



Check for mechanical problems or binding that are temperature related. Components do not move freely in extreme heat or cold due to the presence of contaminants or ice.
 
Throttle body assembly is damaged or has failed
 

Trouble Code: P1546

A/C Clutch Relay Control Circuit Malfunction

Trouble Code Conditions: Engine running; A/C requested "on", and the PCM detected an unexpected voltage on the output circuit that controls the A/C compressor clutch relay for 30 seconds during the test.

Possible Causes:



A/C clutch status line is open or shorted to ground
 
A/C clutch relay is damaged or has failed (contains not closing)
 
A/C clutch relay power circuit is open (test AC CRUISE fuse)
 
PCM has failed
 

Trouble Code: P1546

A/C Clutch Relay Control Circuit Malfunction

Trouble Code Conditions: Engine running; A/C requested "on", and the PCM detected an unexpected voltage on the output circuit that controls the A/C compressor clutch relay for 30 seconds during the test.

Possible Causes:



A/C clutch status line is open or shorted to ground
 
A/C clutch relay is damaged or has failed (contains not closing)
 
A/C clutch relay power circuit is open (test AC CRUISE fuse)
 
PCM has failed
 

Trouble Code: P1571

Traction Control Torque Request Circuit Malfunction

Trouble Code Conditions: Traction Control system not failed, engine speed over 500 rpm for 20 seconds, and the PCM did not receive a Desired Torque signal from the ETC or TAC Module for 3 seconds.

Possible Causes:



TCS desired torque signal circuit is open or shorted to ground
 
TCS desired torque signal circuit is shorted to system power
 
PCM has failed
 

Trouble Code: P1571

Traction Control Torque Request Circuit Malfunction

Trouble Code Conditions: Traction Control system not failed, engine speed over 500 rpm for 20 seconds, and the PCM did not receive a Desired Torque signal from the ETC or TAC Module for 3 seconds.

Possible Causes:



TCS desired torque signal circuit is open or shorted to ground
 
TCS desired torque signal circuit is shorted to system power
 
PCM has failed
 

Trouble Code: P1574

Stoplamp Switch Circuit Malfunction

Trouble Code Conditions: Engine started, engine speed over 700 rpm and the wheel speed indicates more than 20 mph to enable the test (test will disable if the wheel speed is less than 5 mph), then the vehicle speed decreased at a rate greater than 0.5 mph in 500 ms, and the EBTCM

Possible Causes:



Brake switch circuit is open, shorted to ground or shorted to B+
 
Brake switch power circuit is open (test STOP/HAZARD fuse)
 
Brake switch is out-of-adjustment, damaged or has failed
 
EBTCM has failed
 

Trouble Code: P1574

Stoplamp Switch Circuit Malfunction

Trouble Code Conditions: Engine started, engine speed over 700 rpm and the wheel speed indicates more than 20 mph to enable the test (test will disable if the wheel speed is less than 5 mph), then the vehicle speed decreased at a rate greater than 0.5 mph in 500 ms, and the EBTCM

Possible Causes:



Brake switch circuit is open, shorted to ground or shorted to B+
 
Brake switch power circuit is open (test STOP/HAZARD fuse)
 
Brake switch is out-of-adjustment, damaged or has failed
 
EBTCM has failed
 

Trouble Code: P1585

Cruise Control Brake Switch 2 Circuit Malfunction

Trouble Code Conditions: Engine started, engine speed over 1000 rpm with the wheel speed indicating more than 20 mph to enable the test (test will disable if the wheel speed drops below 5 mph), and the PCM detected the vehicle speed decreased by 1 mph in 500 ms without the PCM de

Possible Causes:



C/C brake switch circuit is open, shorted to ground or shorted to system power
 
C/C brake switch is out-of-adjustment or damaged
 
C/C brake switch power circuit is open (test ENG SEN fuse)
 
PCM has failed
 

Trouble Code: P1585

Cruise Control Brake Switch 2 Circuit Malfunction

Trouble Code Conditions: Engine started, engine speed over 1000 rpm with the wheel speed indicating more than 20 mph to enable the test (test will disable if the wheel speed drops below 5 mph), and the PCM detected the vehicle speed decreased by 1 mph in 500 ms without the PCM de

Possible Causes:



C/C brake switch circuit is open, shorted to ground or shorted to system power
 
C/C brake switch is out-of-adjustment or damaged
 
C/C brake switch power circuit is open (test ENG SEN fuse)
 
PCM has failed
 

Trouble Code: P1626

Theft Deterrent System Fuel Enable Circuit Malfunction

Trouble Code Conditions: Engine started; and the PCM detected a loss of the "fuel enable" signal or an incorrect signal from the VTD module. The BCM produces the Theft Deterrent "fuel enable" signal when the key is "on" and the proper key resistor pellet is sensed. The PCM monito

Possible Causes:



The most likely cause of this code is lost communications
 
If the engine starts and stalls, refer to VTD system diagnosis
 
Perform the Powertrain Onboard Diagnostic System Check
 

Trouble Code: P1626

Theft Deterrent System Fuel Enable Circuit Malfunction

Trouble Code Conditions: Engine started; and the PCM detected a loss of the "fuel enable" signal or an incorrect signal from the VTD module. The BCM produces the Theft Deterrent "fuel enable" signal when the key is "on" and the proper key resistor pellet is sensed. The PCM monito

Possible Causes:



The most likely cause of this code is lost communications
 
If the engine starts and stalls, refer to VTD system diagnosis
 
Perform the Powertrain Onboard Diagnostic System Check
 

Trouble Code: P1629

Theft Deterrent Fuel Enable Signal Not Received

Trouble Code Conditions: DTC P1626 not set, an attempt was made to start the engine, and the PCM detected an incorrect signal on the Theft Deterrent Fuel Enable circuit, conditions met for more than 2 seconds. The BCM produces the Theft Deterrent "fuel enable" signal with the key

Possible Causes:



Perform the Onboard Diagnostic System Check
 
Refer to the diagnostics for the Theft Deterrent System
 
If the PCM needs replacing, it must be reprogrammed
 

Trouble Code: P1629

Theft Deterrent Fuel Enable Signal Not Received

Trouble Code Conditions: DTC P1626 not set, an attempt was made to start the engine, and the PCM detected an incorrect signal on the Theft Deterrent Fuel Enable circuit, conditions met for more than 2 seconds. The BCM produces the Theft Deterrent "fuel enable" signal with the key

Possible Causes:



Perform the Onboard Diagnostic System Check
 
Refer to the diagnostics for the Theft Deterrent System
 
If the PCM needs replacing, it must be reprogrammed
 

Trouble Code: P1635

5-Volt Reference 1 Circuit Malfunction

Trouble Code Conditions: Key on or engine running; and the PCM detected the 5v Reference 1 circuit was out of range for 2 seconds. The 5v VREF 1 circuit is used to provide power to the EGR Pintle Position sensor, MAP sensor, Engine Oil Pressure sensor and the TP sensor on this ve

Possible Causes:



5v VREF circuit is shorted to sensor ground or chassis ground
 
5v VREF circuit, TP or MAP sensor circuit is shorted to (B+)
 
5v VREF circuit shorted to EGR sensor High signal circuit
 
EGR solenoid valve (and sensor) is damaged or has failed
 
PCM has faile
 

Trouble Code: P1635

5-Volt Reference 1 Circuit Malfunction

Trouble Code Conditions: Key on or engine running; and the PCM detected the 5v Reference 1 circuit was out of range for 2 seconds. The 5v VREF 1 circuit is used to provide power to the EGR Pintle Position sensor, MAP sensor, Engine Oil Pressure sensor and the TP sensor on this ve

Possible Causes:



5v VREF circuit is shorted to sensor ground or chassis ground
 
5v VREF circuit, TP or MAP sensor circuit is shorted to (B+)
 
5v VREF circuit shorted to EGR sensor High signal circuit
 
EGR solenoid valve (and sensor) is damaged or has failed
 
PCM has faile
 

Trouble Code: P1639

5-Volt Reference 2 Circuit Malfunction

Trouble Code Conditions: Engine started and the PCM detected the 5v VREF 2 circuit was out of range for 10 seconds. The 5v Reference 2 circuit connects to the A/C Pressure and Fuel Tank Pressure sensors.

Possible Causes:



A/C refrigerant pressure sensor VREF circuit is open or shorted to ground
 
A/C refrigerant pressure sensor VREF circuit is shorted to system power
 
A/C pressure sensor or FTP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P1639

5-Volt Reference 2 Circuit Malfunction

Trouble Code Conditions: Engine started and the PCM detected the 5v VREF 2 circuit was out of range for 10 seconds. The 5v Reference 2 circuit connects to the A/C Pressure and Fuel Tank Pressure sensors.

Possible Causes:



A/C refrigerant pressure sensor VREF circuit is open or shorted to ground
 
A/C refrigerant pressure sensor VREF circuit is shorted to system power
 
A/C pressure sensor or FTP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P1653

Fuel Level Output Control Circuit Malfunction

Trouble Code Conditions: Engine started; and the PCM detected an unexpected voltage on the Fuel Level output control circuit for 30 seconds.

Possible Causes:



Fuel level control circuit is open, shorted to ground or to system power (B+)
 
Instrument panel cluster (IPC) has failed
 
PCM has failed
 

Trouble Code: P1653

Fuel Level Output Control Circuit Malfunction

Trouble Code Conditions: Engine started; and the PCM detected an unexpected voltage on the Fuel Level output control circuit for 30 seconds.

Possible Causes:



Fuel level control circuit is open, shorted to ground or to system power (B+)
 
Instrument panel cluster (IPC) has failed
 
PCM has failed
 

Trouble Code: P1665

EVAP Vent Solenoid Control Circuit Malfunction

Trouble Code Conditions: Key on or engine running; and the PCM detected an unexpected voltage on the EVAP Vent solenoid control circuit for 30 seconds.

Possible Causes:



Vent solenoid control circuit is open, shorted to ground or to system power
 
Vent solenoid power circuit is open (check the ENG CNTL fuse)
 
EVAP vent solenoid is damaged or has failed
 
PCM has failed
 

Trouble Code: P1665

EVAP Vent Solenoid Control Circuit Malfunction

Trouble Code Conditions: Key on or engine running; and the PCM detected an unexpected voltage on the EVAP Vent solenoid control circuit for 30 seconds.

Possible Causes:



Vent solenoid control circuit is open, shorted to ground or to system power
 
Vent solenoid power circuit is open (check the ENG CNTL fuse)
 
EVAP vent solenoid is damaged or has failed
 
PCM has failed
 

Trouble Code: P1671

MIL Control Circuit Malfunction

Trouble Code Conditions: Key on or engine running; and the PCM detected the Actual and Commanded state of the MIL control circuit did not match for 30 seconds during the CCM test.

Possible Causes:



MIL control circuit is open, shorted to ground or to power (B+)
 
MIL power circuit is open (check the GAUGES fuse)
 
MIL (bulb) is open or missing
 
PCM has failed
 

Trouble Code: P1671

MIL Control Circuit Malfunction

Trouble Code Conditions: Key on or engine running; and the PCM detected the Actual and Commanded state of the MIL control circuit did not match for 30 seconds during the CCM test.

Possible Causes:



MIL control circuit is open, shorted to ground or to power (B+)
 
MIL power circuit is open (check the GAUGES fuse)
 
MIL (bulb) is open or missing
 
PCM has failed
 

Trouble Code: P1672

Low Engine Oil Lamp Control Circuit Malfunction

Trouble Code Conditions: Engine started, engine running, and the PCM detected an unexpected voltage condition on the Low Oil Lamp driver control circuit for 30 seconds during the CCM test.

Possible Causes:



Oil level lamp control circuit is open, shorted to ground or to B+
 
Oil level lamp power circuit is open (check the GAUGES fuse)
 
Oil level lamp (bulb) is open or missing
 
PCM has failed
 

Trouble Code: P1672

Low Engine Oil Lamp Control Circuit Malfunction

Trouble Code Conditions: Engine started, engine running, and the PCM detected an unexpected voltage condition on the Low Oil Lamp driver control circuit for 30 seconds during the CCM test.

Possible Causes:



Oil level lamp control circuit is open, shorted to ground or to B+
 
Oil level lamp power circuit is open (check the GAUGES fuse)
 
Oil level lamp (bulb) is open or missing
 
PCM has failed
 

Trouble Code: U1000

Class 2 Communication Malfunction

Trouble Code Conditions: Modules connected to the Class 2 circuit monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. When a module receives a message for a critical operating parameter, the m

Possible Causes:



Class 2 circuit is open, shorted to ground or shorted to power
 
PCM ignition power circuit(s) has a high resistance condition
 
PCM main ground circuit(s) has a high resistance condition
 
SDM (module) could be shorted pulling the voltage low
 

Trouble Code: U1000

Class 2 Communication Malfunction

Trouble Code Conditions: Modules connected to the Class 2 circuit monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. When a module receives a message for a critical operating parameter, the m

Possible Causes:



Class 2 circuit is open, shorted to ground or shorted to power
 
PCM ignition power circuit(s) has a high resistance condition
 
PCM main ground circuit(s) has a high resistance condition
 
SDM (module) could be shorted pulling the voltage low
 

Trouble Code: U1016

No Communication With Powertrain Control Module

Trouble Code Conditions: Key on, and a message from a learned ID number was not detected for the five seconds. Modules on the Class 2 circuit monitor for data communications during vehicle operation. When a module receives a message for critical data, the module records the ident

Possible Causes:



PCM Class 2 circuit is open, shorted to ground or to B+
 
PCM ignition power circuit(s) has a high resistance condition
 
PCM main ground circuit(s) has a high resistance condition
 
PCM (module) may have failed and is pulling the circuit low
 

Trouble Code: U1016

No Communication With Powertrain Control Module

Trouble Code Conditions: Key on, and a message from a learned ID number was not detected for the five seconds. Modules on the Class 2 circuit monitor for data communications during vehicle operation. When a module receives a message for critical data, the module records the ident

Possible Causes:



PCM Class 2 circuit is open, shorted to ground or to B+
 
PCM ignition power circuit(s) has a high resistance condition
 
PCM main ground circuit(s) has a high resistance condition
 
PCM (module) may have failed and is pulling the circuit low
 

Trouble Code: U1026

No Communication With Transfer Case Shift Control Module

Trouble Code Conditions: Key on, and a message from a learned ID number was not detected for the five seconds. Modules on the Class 2 circuit monitor for data communications during vehicle operation. When a module receives a message for critical data, the module records the ident

Possible Causes:



TCSCM Class 2 circuit is open, shorted to ground or to B+
 
TCSCM ignition power circuit(s) has a high resistance condition
 
TCSCM main ground circuit(s) has a high resistance condition
 
TCSCM (module) may have failed and is pulling the circuit low
 

Trouble Code: U1026

No Communication With Transfer Case Shift Control Module

Trouble Code Conditions: Key on, and a message from a learned ID number was not detected for the five seconds. Modules on the Class 2 circuit monitor for data communications during vehicle operation. When a module receives a message for critical data, the module records the ident

Possible Causes:



TCSCM Class 2 circuit is open, shorted to ground or to B+
 
TCSCM ignition power circuit(s) has a high resistance condition
 
TCSCM main ground circuit(s) has a high resistance condition
 
TCSCM (module) may have failed and is pulling the circuit low
 

Trouble Code: U1041

No Communication With Electronic Brake Control Module

Trouble Code Conditions: Key on, and a message from a learned ID number was not detected for the five seconds. Modules on the Class 2 circuit monitor for data communications during vehicle operation. When a module receives a message for critical data, the module records the ident

Possible Causes:



EBCM Class 2 circuit is open, shorted to ground or to B+
 
EBCM ignition power circuit(s) has a high resistance condition
 
EBCM main ground circuit(s) has a high resistance condition
 
EBCM (module) may have failed and is pulling the circuit low
 

Trouble Code: U1041

No Communication With Electronic Brake Control Module

Trouble Code Conditions: Key on, and a message from a learned ID number was not detected for the five seconds. Modules on the Class 2 circuit monitor for data communications during vehicle operation. When a module receives a message for critical data, the module records the ident

Possible Causes:



EBCM Class 2 circuit is open, shorted to ground or to B+
 
EBCM ignition power circuit(s) has a high resistance condition
 
EBCM main ground circuit(s) has a high resistance condition
 
EBCM (module) may have failed and is pulling the circuit low
 

Trouble Code: U1048

No Communication With Rear Wheel Steering Control Module

Trouble Code Conditions: Key on, and a message from a learned ID number was not detected for the five seconds. Modules on the Class 2 circuit monitor for data communications during vehicle operation. When a module receives a message for critical data, the module records the ident

Possible Causes:



RWSCM Class 2 circuit is open, shorted to ground or to B+
 
RWSCM ignition power circuit has a high resistance condition
 
RESCM main ground circuit(s) has a high resistance condition
 
RESCM (module) may have failed and is pulling the circuit low
 

Trouble Code: U1048

No Communication With Rear Wheel Steering Control Module

Trouble Code Conditions: Key on, and a message from a learned ID number was not detected for the five seconds. Modules on the Class 2 circuit monitor for data communications during vehicle operation. When a module receives a message for critical data, the module records the ident

Possible Causes:



RWSCM Class 2 circuit is open, shorted to ground or to B+
 
RWSCM ignition power circuit has a high resistance condition
 
RESCM main ground circuit(s) has a high resistance condition
 
RESCM (module) may have failed and is pulling the circuit low
 

Trouble Code: U1064

No Communication With Body Control Module

Trouble Code Conditions: Key on, and a message from a learned ID number was not detected for the five seconds. Modules on the Class 2 circuit monitor for data communications during vehicle operation. When a module receives a message for critical data, the module records the ident

Possible Causes:



BCM Class 2 circuit is open, shorted to ground or to B+
 
BCM ignition power circuit has a high resistance condition
 
BCM main ground circuit(s) has a high resistance condition
 
BCM (module) may have failed and is pulling the circuit low
 

Trouble Code: U1064

No Communication With Body Control Module

Trouble Code Conditions: Key on, and a message from a learned ID number was not detected for the five seconds. Modules on the Class 2 circuit monitor for data communications during vehicle operation. When a module receives a message for critical data, the module records the ident

Possible Causes:



BCM Class 2 circuit is open, shorted to ground or to B+
 
BCM ignition power circuit has a high resistance condition
 
BCM main ground circuit(s) has a high resistance condition
 
BCM (module) may have failed and is pulling the circuit low
 

Trouble Code: U1088

No Communication With SDM (Restraint Module)

Trouble Code Conditions: Key on, and a message from a learned ID number was not detected for the five seconds. Modules on the Class 2 circuit monitor for data communications during vehicle operation. When a module receives a message for critical data, the module records the ident

Possible Causes:



SDM Class 2 circuit is open, shorted to ground or to B+
 
SDM ignition power circuit has a high resistance condition
 
SDM main ground circuit(s) has a high resistance condition
 
SDM (module) may have failed and is pulling the circuit low
 

Trouble Code: U1088

No Communication With SDM (Restraint Module)

Trouble Code Conditions: Key on, and a message from a learned ID number was not detected for the five seconds. Modules on the Class 2 circuit monitor for data communications during vehicle operation. When a module receives a message for critical data, the module records the ident

Possible Causes:



SDM Class 2 circuit is open, shorted to ground or to B+
 
SDM ignition power circuit has a high resistance condition
 
SDM main ground circuit(s) has a high resistance condition
 
SDM (module) may have failed and is pulling the circuit low
 

Trouble Code: U1096

No Communication With Instrument Panel Cluster

Trouble Code Conditions: Key on, and a message from a learned ID number was not detected for the five seconds. Modules on the Class 2 circuit monitor for data communications during vehicle operation. When a module receives a message for critical data, the module records the ident

Possible Causes:



IPC Class 2 circuit is open, shorted to ground or to B+
 
IPC ignition power circuit has a high resistance condition
 
IPC main ground circuit(s) has a high resistance condition
 
IPC (module) may have failed and is pulling the circuit low
 

Trouble Code: U1096

No Communication With Instrument Panel Cluster

Trouble Code Conditions: Key on, and a message from a learned ID number was not detected for the five seconds. Modules on the Class 2 circuit monitor for data communications during vehicle operation. When a module receives a message for critical data, the module records the ident

Possible Causes:



IPC Class 2 circuit is open, shorted to ground or to B+
 
IPC ignition power circuit has a high resistance condition
 
IPC main ground circuit(s) has a high resistance condition
 
IPC (module) may have failed and is pulling the circuit low
 

Trouble Code: U1097

No Communication With Driver Information Center

Trouble Code Conditions: Key on, and a message from a learned ID number was not detected for the five seconds. Modules on the Class 2 circuit monitor for data communications during vehicle operation. When a module receives a message for critical data, the module records the ident

Possible Causes:



DIC Class 2 circuit is open, shorted to ground or to B+
 
DIC ignition power circuit has a high resistance condition
 
DIC main ground circuit(s) has a high resistance condition
 
DIC (module) may have failed and is pulling the circuit low
 

Trouble Code: U1097

No Communication With Driver Information Center

Trouble Code Conditions: Key on, and a message from a learned ID number was not detected for the five seconds. Modules on the Class 2 circuit monitor for data communications during vehicle operation. When a module receives a message for critical data, the module records the ident

Possible Causes:



DIC Class 2 circuit is open, shorted to ground or to B+
 
DIC ignition power circuit has a high resistance condition
 
DIC main ground circuit(s) has a high resistance condition
 
DIC (module) may have failed and is pulling the circuit low
 

Trouble Code: U1151

No Communication With Vehicle Interface Unit

Trouble Code Conditions: Key on, and a message from a learned ID number was not detected for the five seconds. Modules on the Class 2 circuit monitor for data communications during vehicle operation. When a module receives a message for critical data, the module records the ident

Possible Causes:



VIU Class 2 circuit is open, shorted to ground or to B+
 
VIU ignition power circuit has a high resistance condition
 
VIU main ground circuit(s) has a high resistance condition
 
VIU (module) may have failed and is pulling the circuit low
 

Trouble Code: U1151

No Communication With Vehicle Interface Unit

Trouble Code Conditions: Key on, and a message from a learned ID number was not detected for the five seconds. Modules on the Class 2 circuit monitor for data communications during vehicle operation. When a module receives a message for critical data, the module records the ident

Possible Causes:



VIU Class 2 circuit is open, shorted to ground or to B+
 
VIU ignition power circuit has a high resistance condition
 
VIU main ground circuit(s) has a high resistance condition
 
VIU (module) may have failed and is pulling the circuit low
 

Trouble Code: U1152

No Communication With HVAC Control Module

Trouble Code Conditions: Key on, and a message from a learned ID number was not detected for the five seconds. Modules on the Class 2 circuit monitor for data communications during vehicle operation. When a module receives a message for critical data, the module records the ident

Possible Causes:



HVAC Class 2 circuit is open, shorted to ground or to B+
 
HVAC ignition power circuit has a high resistance condition
 
HVAC main ground circuit(s) has a high resistance condition
 
HVAC (module) may have failed and is pulling the circuit low
 

Trouble Code: U1152

No Communication With HVAC Control Module

Trouble Code Conditions: Key on, and a message from a learned ID number was not detected for the five seconds. Modules on the Class 2 circuit monitor for data communications during vehicle operation. When a module receives a message for critical data, the module records the ident

Possible Causes:



HVAC Class 2 circuit is open, shorted to ground or to B+
 
HVAC ignition power circuit has a high resistance condition
 
HVAC main ground circuit(s) has a high resistance condition
 
HVAC (module) may have failed and is pulling the circuit low
 

Trouble Code: U1255

Class 2 Communications Malfunction

Trouble Code Conditions: Modules connected to the Class 2 circuit monitor for serial data communications during normal vehicle operation. Operating data and commands are exchanged among modules. When a module receives a message for a critical operating parameter, the module recor

Possible Causes:



Class 2 circuit is open, shorted to ground or shorted to power
 
PCM ignition power circuit(s) has a high resistance condition
 
PCM main ground circuit(s) has a high resistance condition
 

Trouble Code: U1255

Class 2 Communications Malfunction

Trouble Code Conditions: Modules connected to the Class 2 circuit monitor for serial data communications during normal vehicle operation. Operating data and commands are exchanged among modules. When a module receives a message for a critical operating parameter, the module recor

Possible Causes:



Class 2 circuit is open, shorted to ground or shorted to power
 
PCM ignition power circuit(s) has a high resistance condition
 
PCM main ground circuit(s) has a high resistance condition
 

Trouble Code: U1300

Class 2 Circuit Short to Ground

Trouble Code Conditions: Key on or engine running; system voltage supplied to the module is in the normal operating voltage range, vehicle power mode requires serial data communication to occur, and the PCM did no detect any valid messages on the Class 2 circuit, or the voltage c

Possible Causes:



Class 2 serial data line was in a low state for 3 seconds due to a short to sensor ground or chassis ground
 
One or more modules on the Class 2 line has a short to ground
 

Trouble Code: U1300

Class 2 Circuit Short to Ground

Trouble Code Conditions: Key on or engine running; system voltage supplied to the module is in the normal operating voltage range, vehicle power mode requires serial data communication to occur, and the PCM did no detect any valid messages on the Class 2 circuit, or the voltage c

Possible Causes:



Class 2 serial data line was in a low state for 3 seconds due to a short to sensor ground or chassis ground
 
One or more modules on the Class 2 line has a short to ground
 

Trouble Code: U1301

Class 2 Circuit Short to Battery

Trouble Code Conditions: Key on or engine running; system voltage supplied to the module is in the normal operating voltage range, vehicle power mode requires serial data communication to occur, and the PCM did no detect any valid messages on the Class 2 circuit, or the voltage c

Possible Causes:



Class 2 serial data line was in a high state for 3 seconds due to a short to VREF or system power
 
One or more modules on Class 2 line has an short to power
 

Trouble Code: U1301

Class 2 Circuit Short to Battery

Trouble Code Conditions: Key on or engine running; system voltage supplied to the module is in the normal operating voltage range, vehicle power mode requires serial data communication to occur, and the PCM did no detect any valid messages on the Class 2 circuit, or the voltage c

Possible Causes:



Class 2 serial data line was in a high state for 3 seconds due to a short to VREF or system power
 
One or more modules on Class 2 line has an short to power
 

Trouble Code: U1305

Class 2 Data Link High or Low

Trouble Code Conditions: Key on or engine running; system voltage supplied to the module is in the normal operating voltage range, vehicle power mode requires serial data communication to occur, and the PCM did no detect any valid messages on the Class 2 circuit, or the voltage c

Possible Causes:



Class 2 serial data line has either a high or low voltage condition on the circuit, and the module cannot identify the fault
 
One or more modules on Class 2 line has an short to power
 
One or more modules on the Class 2 line has a short to ground
 

Trouble Code: U1305

Class 2 Data Link High or Low

Trouble Code Conditions: Key on or engine running; system voltage supplied to the module is in the normal operating voltage range, vehicle power mode requires serial data communication to occur, and the PCM did no detect any valid messages on the Class 2 circuit, or the voltage c

Possible Causes:



Class 2 serial data line has either a high or low voltage condition on the circuit, and the module cannot identify the fault
 
One or more modules on Class 2 line has an short to power
 
One or more modules on the Class 2 line has a short to ground
 

 
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