Honda_Passport_1997-2002

TroubleCodes (3 of 6)

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3.2L V6 - Std



3.2L V6 - Std

Trouble Code: P0101

Mass Airflow Sensor Range/Performance

Trouble Code Conditions: DTC P0106, P0107, P0108, P0121, P0122 and P0123 not set, system voltage at 11-16v, engine running at a stable idle speed, throttle angle stable (±1%), Calculated airflow from 25-40 g/sec, conditions met for 1 second, and the PCM detected a MAF sensor frequency that was significantly higher or lower than a "predicted" MAF airflow based on throttle position and engine speed for 12.5 seconds over a 25 second period during the CCM Rationality test.

Possible Causes:



Air leaks after the MAF sensor, or in the EGR or PCV system
 
Engine oil cap missing, engine oil dipstick not fully seated
 
MAF sensor is contaminated, dirty or out-of-calibration
 
MAF sensor ground circuit has high resistance
 
MAF minimum airflow rate to low at idle or during deceleration
 
MAP or TP sensor signal skewed, stuck or out of calibration
 
High signal interference (i.e., electrical noise from the ignition)
 
PCM has failed
 

Trouble Code: P0102

MAF Sensor Circuit Low Frequency

Trouble Code Conditions: Engine started, engine speed over 500 rpm for 10 seconds, system voltage over 11.5v, the PCM detected the MAF sensor frequency was less than 1000 Hz for a total of 50% of the last 100 samples in the CCM Rationality test (a sample is taken every cylinder event).

Possible Causes:



MAF sensor signal is shorted to ground
 
MAF sensor power circuit is open
 
MAF sensor is contaminated, dirty or is damaged
 
PCM has failed
 

Trouble Code: P0103

MAF Sensor Circuit High Frequency

Trouble Code Conditions: Engine started, engine speed over 500 rpm for 10 seconds, system voltage over 11.5v, the PCM detected the MAF sensor frequency was more than 10,000 Hz for a total of 50% of the last 200 samples in the CCM Rationality test (a sample is taken every cylinder event).

Possible Causes:



RFI or EMI interference from the Generator or Ignition system
 
RFI or EMI interference from the an Ignition system component
 
MAF sensor is contaminated, dirty or is damaged
 
PCM has failed
 

Trouble Code: P0106

MAP Sensor Signal Range/Performance

Trouble Code Conditions: DTC P0121, P0122 and P0123 not set, engine speed stable (±100 rpm), throttle angle stable (±1%), IAC counts steady (±10 counts), EGR flow stable (±4%), no change in the A/C clutch, PSPS, Brake switch or TCC status, conditions met for 1 second, and the PCM detected the Actual MAP sensor value varied more than 10 kPa from the Expected MAP value for 10 seconds over a 20 second period.

Possible Causes:



MAP sensor circuit open or shorted to ground (intermittent)
 
MAP sensor source vacuum line is leaking or restricted
 
MAP sensor source vacuum line is plugged at intake manifold
 
MAP sensor is damaged, out-of-calibration or has failed
 
PCM has failed
 

Trouble Code: P0107

MAP Sensor Circuit Low Input

Trouble Code Conditions: DTC P0121, P0122 and P0123 not set, engine started, system voltage from 11-16v, then with the engine speed below 1000 rpm and throttle angle over 1%, or with the engine speed over 1000 rpm and throttle angle over 2%, the PCM detected the MAP sensor was less than 0.04v (11 kPa) for 10 seconds over a 20 second period.

Possible Causes:



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

Trouble Code: P0108

MAP Sensor Circuit High Input

Trouble Code Conditions: DTC P0121, P0122 and P0123 not set, engine started, engine speed less than 1000 rpm and the throttle angle less than 3%, or with engine speed more than 1000 rpm and the throttle angle less than 10%, the PCM detected the MAP sensor was more than 4.40v (90 kPa) for 10 seconds over a 16 second period during the test.

Possible Causes:



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

Trouble Code: P0112

Intake Air Temperature Sensor Circuit Low Input

Trouble Code Conditions: DTC P0502 not set, engine started, engine runtime over 2 minutes, vehicle speed over 30 mph, and the PCM detected the IAT sensor indicated less than 0.10v (Scan Tool reads 298ºF) for 12.5 seconds over a 20 second period during the CCM test.

Possible Causes:



IAT sensor circuit shorted to ground between sensor and PCM
 
IAT sensor is damaged, out-of-calibration or has failed
 
PCM has failed
 

Trouble Code: P0113

Intake Air Temperature Sensor Circuit High Input

Trouble Code Conditions: DTC P0502 not set, engine started, engine runtime over 4 minutes, vehicle speed over 20 mph, ECT sensor more than 140ºF, MAF sensor less than 20 g/sec, and the PCM detected the IAT sensor indicate more than 4.90v (Scan Tool reads -38ºF) for 12.5 second over a 25 second period during the CCM test.

Possible Causes:



IAT sensor signal circuit is open between the sensor and PCM
 
IAT sensor ground circuit is open between the sensor and PCM
 
IAT sensor is damaged, out-of-calibration or has failed
 
PCM has failed
 

Trouble Code: P0117

Engine Coolant Temperature Sensor Circuit Low Input

Trouble Code Conditions: Engine started, engine runtime over 1 minute, and the PCM detected the ECT sensor indicated less than 0.10v (Scan Tool reads 302ºF) for 6.25 seconds for 50 seconds over a 100 second period during the CCM test.

Possible Causes:



ECT sensor circuit shorted to ground between sensor and PCM
 
ECT sensor is damaged, out-of-calibration or has failed
 
PCM has failed
 

Trouble Code: P0118

Engine Coolant Temperature Sensor Circuit High Input

Trouble Code Conditions: Engine started, engine runtime over 90 seconds, and the PCM detected the ECT sensor was more than 4.90v (Scan Tool reads -38ºF) for 50 seconds over a 100 second period during the CCM test.

Possible Causes:



ECT sensor signal circuit is open between the sensor and PCM
 
ECT sensor ground circuit open between the sensor and PCM
 
ECT sensor is damaged, out-of-calibration or has failed
 
PCM has failed
 

Trouble Code: P0121

Throttle Position Sensor Circuit Range/Performance

Trouble Code Conditions: DTC P0121, P0122, P0123 and P1122 not set, engine started, MAP sensor less than 55 kPa, throttle angle stable (±1%), and the PCM detected the Actual throttle angle was not close to the Predicted throttle angle for 12.5 seconds over a 25 second period in the test.

Possible Causes:



TP sensor signal circuit is open to the PCM (intermittent fault)
 
TP sensor ground circuit is open (an intermittent fault)
 
MAP sensor damaged or out-of-calibration
 
Throttle body is damaged or throttle linkage is bent or binding
 
TP sensor is damaged or has failed
 

Trouble Code: P0122

Throttle Position Sensor Circuit Low Input

Trouble Code Conditions: Key on or engine running, and the PCM detected the TP sensor indicated less than 0.22v for 0.78 seconds over a 1.5 second period.

Possible Causes:



TP sensor signal circuit is grounded between sensor and PCM
 
Throttle body is damaged
 
Throttle linkage is bent or binding (sticking)
 
TP sensor is damaged or has failed
 

Trouble Code: P0123

Throttle Position Sensor Circuit High Input

Trouble Code Conditions: Key on or engine running, and the PCM detected the Throttle Position (TP) sensor was more than 4.88v for 0.78 seconds out of a 1.5 second period during the CCM test.

Possible Causes:



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

Trouble Code: P0125

Insufficient Coolant Temperature For Closed Loop

Trouble Code Conditions: DTC P0112, P0113, P0117, P0118, P1111, P1112, P1114 and P1115 not set, engine started, ECT and IAT sensors from 14-82ºF at startup, then with the IAT sensor from 17-50ºF at startup, the PCM detected the ECT signal did not reach 84ºF after 20 minutes; or with the IAT sensor more than 50ºF at startup, the PCM detected the ECT sensor signal was less than 84ºF after 2 minutes, condition met at least 20 times during the CCM Rationality test.

Possible Causes:



Inspect for low coolant level or an incorrect coolant mixture
 
Check the operation of the thermostat (it may be stuck open)
 
ECT sensor is damaged or out-of-calibration (it is "skewed")
 
ECT sensor signal circuit has high resistance
 
ECT sensor has failed
 
PCM has failed
 

Trouble Code: P0128

Thermostat Malfunction

Trouble Code Conditions: DTC P0101, P0102, P0103, P0112, P0113, P0117, P0118 and P0502 not set, and the PCM detected under one of these cases: Cold Case Startup Conditions IAT sensor from 20-50ºF, and the PCM detected it took over 263 seconds to reach a stabilized thermostat regulated temperature. Warm Case Startup Conditions IAT sensor from 50-128ºF, and the PCM detected it took over 239 seconds to reach a stabilized thermostat regulated temperature.

Possible Causes:



Check the operation of the thermostat (it may be stuck open)
 
ECT sensor is damaged or out-of-calibration (it is "skewed")
 
PCM has failed
 

Trouble Code: P0131

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

Trouble Code Conditions: DTC P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0171, P0172 and P0300, P0301-P0306 not set, engine running in closed loop with the A/F ratio from 14.5-14.8:1, ECT sensor more than 140ºF, throttle angle from 3-19% for 5 seconds, the PCM detected the HO2S-11 signal was less than 26 mv for 77 seconds over a 90 second period during the test.

Possible Causes:



HO2S signal circuit is open or shorted to ground
 
HO2S contaminated by water or wrong fuel, or it has failed
 
PCM has failed
 

Trouble Code: P0132

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

Trouble Code Conditions: DTC P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0171, P0172 and P0300, P0301-P0306 not set, engine running in closed loop with the A/F ratio from 14.5-14.8:1, throttle angle from 3-19% for 5 seconds, the PCM detected the HO2S-11 signal was less than 952 mv for 77 seconds over a 90 second period; or the HO2S-11 signal was more than 500 mv during Decel Fuel Cutoff mode for 3 seconds during the CCM test.

Possible Causes:



HO2S signal circuit shorted to system power (oil in connector)
 
HO2S contaminated by water or wrong fuel
 
HO2S is damaged or has failed
 
PCM has failed
 

Trouble Code: P0133

HO2S-11 (Bank 1 Sensor 1) Slow Response

Trouble Code Conditions: DTC P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0171, P0172 and P0300, P0301-P0306 not set, engine runtime 1 minute in closed loop, ECT sensor more than 122ºF, engine speed from 1500-3000 rpm, MAF sensor from 9-42 g/sec, Purge duty cycle over 1%, conditions met for 3 seconds, then 90 seconds after entering closed loop, the PCM detected the HO2S-11 lean-to-rich average transition time was over 94 ms, or the rich-to-lean average transition time was over 105 ms during the test.

Possible Causes:



Exhaust leak present in the exhaust manifold or exhaust pipes
 
HO2S element fuel contamination
 
HO2S element has deteriorated
 
PCM has failed
 

Trouble Code: P0134

HO2S-11 (Bank 1 Sensor 1) Insufficient Activity Detected

Trouble Code Conditions: DTC P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0171, P0172 and P0300, P0301-306 not set, system voltage from 11-16v, engine runtime over 40 seconds, then after the PCM determined the Oxygen Sensor Heater test passed, it detected the HO2S-11 signal remained from 400-500 mv for 77 seconds over a 90 second period in the Oxygen Sensor Monitor test.

Possible Causes:



Exhaust leak present in exhaust manifold or exhaust pipes
 
HO2S element fuel contamination or has deteriorated
 
HO2S signal circuit or the ground circuit has high resistance
 
HO2S heater element has failed, or the heater circuit is open
 
PCM has failed
 

Trouble Code: P0135

HO2S-11 (Bank 1 Sensor 1) Heater Circuit Malfunction

Trouble Code Conditions: Engine started cold, ECT and IAT sensors less than 90ºF and within 14ºF at startup, engine running, system voltage from 11-16v, then with the average Calculated airflow less than 15 g/sec during the test period, the PCM detected the HO2S-11 signal did not vary more than 150 mv from the bias voltage of 400 to 500 mv for up to 150 seconds during the Oxygen Sensor Heater Monitor test.

Possible Causes:



HO2S heater power circuit is open (check the 20A heater fuse)
 
HO2S heater ground circuit is open
 
HO2S heater element has high resistance or has failed
 
PCM has failed
 

Trouble Code: P0137

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

Trouble Code Conditions: DTC P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0171, P0172 and P0300, P0301-P0306 not set, engine running in closed loop with the A/F ratio from 14.5-14.8:1, ECT sensor more than 140ºF, throttle angle from 3-19% for 5 seconds, the PCM detected the HO2S-12 signal was less than 26 mv for 106 seconds over a 125 second period during the CCM test.

Possible Causes:



HO2S signal circuit is open or shorted to ground
 
HO2S contaminated by water or wrong fuel, or it has failed
 
PCM has failed
 

Trouble Code: P0138

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

Trouble Code Conditions: DTC P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0171, P0172 and P0300, P0301-P0306 not set, engine running in closed loop with the A/F ratio command at 14.5-14.8:1, throttle angle from 3-19% for 5 seconds, the PCM detected the HO2S-12 signal was less than 952 mv for 106 seconds over a 125 second period; or the HO2S-12 signal was more than 500 mv during Decel Fuel Cutoff mode for 3 seconds during the CCM test.

Possible Causes:



HO2S signal circuit shorted to system power (oil in connector)
 
HO2S contaminated by water or wrong fuel
 
HO2S is damaged or has failed
 
PCM has failed
 

Trouble Code: P0140

HO2S-12 (Bank 1 Sensor 2) Insufficient Activity Detected

Trouble Code Conditions: DTC P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0171, P0172 and P0300, P0301-306 not set, system voltage from 11-16v, engine runtime over 40 seconds, then after the PCM determined the Oxygen Sensor Heater test passed, it detected the HO2S-12 signal remained from 426-474 mv for 105 seconds of a 125 second period in the Oxygen Sensor Monitor test.

Possible Causes:



Exhaust leak present in exhaust manifold or exhaust pipes
 
HO2S element fuel contamination or has deteriorated
 
HO2S signal circuit or the ground circuit has high resistance
 
HO2S heater element has failed, or the heater circuit is open
 
PCM has failed
 

Trouble Code: P0141

HO2S-12 (Bank 1 Sensor 2) Heater Circuit Malfunction

Trouble Code Conditions: Engine started cold, ECT and IAT sensors less than 90ºF and within 11ºF at startup, engine running, system voltage from 10-16v, then with the average Calculated airflow less than 23 g/sec during the test period, the PCM detected the HO2S-12 signal did not vary more than 150 mv from the bias voltage of 400 to 500 mv for up to 300 seconds during the Oxygen Sensor Heater Monitor test.

Possible Causes:



HO2S heater power circuit is open (check the 20A heater fuse)
 
HO2S heater ground circuit is open
 
HO2S heater element has high resistance or has failed
 
PCM has failed
 

Trouble Code: P0143

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

Trouble Code Conditions: DTC P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0171, P0172 and P0300, P0301-P0306 not set, engine running in closed loop with the A/F ratio from 14.5-14.8:1, ECT sensor more than 140ºF, throttle angle from 3-19% for 5 seconds, the PCM detected the HO2S-13 signal was less than 22 mv for 106 seconds over a 125 second period during the CCM test.

Possible Causes:



HO2S signal circuit is open or shorted to ground
 
HO2S contaminated by water or wrong fuel, or it has failed
 
PCM has failed
 

Trouble Code: P0144

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

Trouble Code Conditions: DTC P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0171, P0172 and P0300, P0301-P0306 not set, engine running in closed loop with the A/F ratio from 14.5-14.8:1, ECT sensor more than 140ºF, throttle angle from 3-19% for 5 seconds, the PCM detected the HO2S-13 signal was more than 952 mv for 106 seconds over a 125 second period during the CCM test.

Possible Causes:



HO2S signal shorted to system power in harness (intermittent)
 
HO2S signal circuit shorted to system power (oil in connector)
 
HO2S contaminated by water or wrong fuel, damaged or failed
 
PCM has failed
 

Trouble Code: P0146

HO2S-13 (Bank 1 Sensor 3) Insufficient Activity Detected

Trouble Code Conditions: DTC P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0171, P0172 and P0300, P0301-306 not set, system voltage from 11-16v, engine runtime over 40 seconds, then after the PCM determined the Oxygen Sensor Heater test passed, it detected the HO2S-13 signal remained from 426-474 mv for 105 seconds of a 125 second period in the Oxygen Sensor Monitor test.

Possible Causes:



Exhaust leak present in exhaust manifold or exhaust pipes
 
HO2S element fuel contamination or has deteriorated
 
HO2S signal circuit or the ground circuit has high resistance
 
HO2S heater element has failed, or the heater circuit is open
 
PCM has failed
 

Trouble Code: P0147

HO2S-13 (Bank 1 Sensor 3) Heater Circuit Malfunction

Trouble Code Conditions: Engine started cold, ECT and IAT sensors less than 90ºF and within 11ºF at startup, engine running, system voltage from 11-16v, then with the average Calculated airflow less than 23 g/sec during the test period, the PCM detected the HO2S-13 signal did not vary more than 150 mv from the bias voltage of 400 to 500 mv for up to 300 seconds during the Oxygen Sensor Heater Monitor test.

Possible Causes:



HO2S power circuit is open (check the O2S heater fuse)
 
HO2S heater ground circuit is open
 
HO2S heater element has high resistance
 
HO2S heater element has failed (open or shorted)
 
PCM has failed
 

Trouble Code: P0151

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

Trouble Code Conditions: DTC P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0171, P0172 and P0300, P0301-P0306 not set, engine running in closed loop with the A/F ratio from 14.5-14.8:1, ECT sensor more than 140ºF, throttle angle from 3-19% for 5 seconds, the PCM detected the HO2S-21 signal was less than 22 mv for 77 seconds over a 90 second period during the CCM test.

Possible Causes:



HO2S signal circuit is open or shorted to ground
 
HO2S contaminated by water or wrong fuel
 
HO2S is damaged or has failed
 
PCM has failed
 

Trouble Code: P0152

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

Trouble Code Conditions: DTC P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0171, P0172 and P0300, P0301-P0306 not set, engine running in closed loop with the A/F ratio command at 14.5-14.8:1, throttle angle from 3-19% for 5 seconds, the PCM detected the HO2S-21 signal was less than 952 mv for 77 seconds over a 90 second period; or the HO2S-21 signal was more than 500 mv during Decel Fuel Cutoff mode for 3 seconds during the CCM test.

Possible Causes:



HO2S signal circuit shorted to system power (oil in connector)
 
HO2S contaminated by water or wrong fuel
 
HO2S is damaged or has failed
 
PCM has failed
 

Trouble Code: P0153

HO2S-21 (Bank 2 Sensor 1) Slow Response

Trouble Code Conditions: DTC P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0171, P0172 and P0300, P0301-P0306 not set, engine runtime 1 minute in closed loop, ECT sensor more than 122ºF, engine speed from 1500-3000 rpm, MAF sensor from 9-42 g/sec, Purge duty cycle over 1%, conditions met for 3 seconds, then 90 seconds after entering closed loop, the PCM detected the HO2S-21 lean-to-rich average transition time was over 94 ms, or the rich-to-lean average transition time was over 105 ms during the Oxygen Sensor Monitor test.

Possible Causes:



Exhaust leak present in the exhaust manifold or exhaust pipes
 
HO2S element fuel contamination
 
HO2S element has deteriorated
 
PCM has failed
 

Trouble Code: P0154

HO2S-21 (Bank 2 Sensor 1) Insufficient Activity Detected

Trouble Code Conditions: DTC P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0171, P0172 and P0300, P0301-306 not set, system voltage from 11-16v, engine runtime over 40 seconds, then after the PCM determined the Oxygen Sensor Heater test passed, it detected the HO2S-21 signal remained from 400-500 mv for 77 seconds over a 90 second period in the Oxygen Sensor Monitor test.

Possible Causes:



Exhaust leak present in exhaust manifold or exhaust pipes
 
HO2S element fuel contamination or has deteriorated
 
HO2S signal circuit or the ground circuit has high resistance
 
HO2S heater element has failed, or the heater circuit is open
 
PCM has failed
 

Trouble Code: P0155

HO2S-21 (Bank 2 Sensor 1) Heater Circuit Malfunction

Trouble Code Conditions: DTC P0151, P0152, P0153 and P0154 not set, ECT and IAT sensor signals less than 90ºF, and within 11ºF at startup, system voltage from 11-16v, throttle angle under 40%, average Calculated airflow less than 18 g/sec in the sample period, and the PCM detected the HO2S-21 signal did not vary more than 150 mv from the bias voltage (400-500 mv) for too long a period (maximum time is 120 seconds).

Possible Causes:



HO2S power circuit is open (from the O2S heater fuse)
 
HO2S heater ground circuit is open
 
HO2S heater element has high resistance
 
HO2S heater element has failed (open or shorted)
 
PCM has failed
 

Trouble Code: P0157

HO2S-22 (Bank 2 Sensor 2) Circuit Low Input

Trouble Code Conditions: DTC P0161 not set, ECT sensor more than 140ºF, engine running in closed loop with the A/F ratio at 14.5-14.8:1, throttle angle from 3-19%, and the PCM detected the HO2S-22 signal was less than 26 mv for 106 seconds out of a 125 second period; or that it was more than 400 mv in Power Enrichment Mode during the test.

Possible Causes:



HO2S signal circuit is open or shorted to ground
 
HO2S contaminated by water or wrong fuel, or it has failed
 
PCM has failed
 

Trouble Code: P0158

HO2S-22 (Bank 2 Sensor 2) Circuit High Input

Trouble Code Conditions: DTC P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0171, P0172 and P0300, P0301-P0306 not set, engine running in closed loop with the A/F ratio command at 14.5-14.8:1, throttle angle from 3-19% for 5 seconds, the PCM detected the HO2S-22 signal was less than 952 mv for 106 seconds over a 125 second period; or the HO2S-12 signal was more than 500 mv during Decel Fuel Cutoff mode for 3 seconds during the CCM test.

Possible Causes:



HO2S signal shorted to system power in harness (intermittent)
 
HO2S signal circuit shorted to system power (oil in connector)
 
HO2S contaminated by water or wrong fuel, damaged or failed
 
PCM has failed
 

Trouble Code: P0160

HO2S-22 (Bank 2 Sensor 2) Insufficient Activity Detected

Trouble Code Conditions: DTC P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0171, P0172 and P0300, P0301-P0306 not set, system voltage from 11-16v, engine runtime over 40 seconds, then after the PCM determined the Oxygen Sensor Heater test passed, it detected the HO2S-22 signal remained from 426-474 mv for 105 seconds of a 125 second period in the Oxygen Sensor Monitor test.

Possible Causes:



Exhaust leak present in exhaust manifold or exhaust pipes
 
HO2S element has fuel contamination or has deteriorated
 
HO2S signal circuit or the ground circuit has high resistance
 
PCM has failed
 

Trouble Code: P0161

HO2S-22 (Bank 2 Sensor 2) Heater Circuit Malfunction

Trouble Code Conditions: Cold engine startup, ECT and IAT sensor less than 90ºF, and within 11ºF at startup, system voltage at 11-16v, average Calculated airflow during the test period less than 23 g/sec, and the PCM detected the HO2S-22 signal changed less than 150 mv from the bias voltage of 400-500 mv for up to 300 seconds during the test.

Possible Causes:



HO2S power circuit is open (check the O2S heater fuse)
 
HO2S heater element has failed (it may be open or shorted)
 
PCM has failed
 

Trouble Code: P0171

Fuel System Too Lean (Bank 1)

Trouble Code Conditions: DTC P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0131, P0132, P0133, P0134, P0135, P0137, P0138, P0201-206, P0300, P0301=P0306, P0401, P0502, P0503, P0506, P0507, P1406 and P1441 not set, engine running in closed loop, system voltage from 11-16v, BARO sensor over 72.5 kPa, ECT sensor from 77-212ºF, IAT sensor from -40 to 248ºF, MAP sensor from 24-99 kPa, throttle angle less than 95%, VSS under 85 mph, engine speed from 400-6000 rpm, MAF sensor from 2-20 g/sec, Purge duty cycle over 0%, and the PCM detected the average of the Long Term fuel trim values was more than +20%.

Possible Causes:



Air leaks after the MAF sensor, or in the EGR or PCV system
 
Base engine "mechanical" fault affecting one or more cylinders
 
Exhaust leaks before or near where the front HO2S is mounted
 
Fuel control sensor is out of calibration (i.e., ECT, IAT or MAP)
 
Fuel delivery system supplying too little fuel during cruise or idle periods (e.g., faulty fuel pump or dirty, restricted fuel filter)
 
Fuel injector (one or more) dirty or pressure regulator has failed
 
HO2S is contaminated, deteriorated or it has failed
 
Vehicle driven low on fuel or until it ran out of fuel
 

Trouble Code: P0172

Fuel System Too Rich (Bank 1)

Trouble Code Conditions: DTC P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0131, P0132, P0133, P0134, P0135, P0137, P0138, P0201-206, P0300, P0301=P0306, P0401, P0502, P0503, P0506, P0507, P1406 and P1441 not set, engine running in closed loop, BARO sensor over 72.5 kPa, ECT sensor from 77-212ºF, IAT sensor from -40 to 248ºF, MAP sensor from 24-99 kPa, throttle angle less than 95%, VSS under 85 mph, engine speed from 400-6000 rpm, MAF sensor from 2-20 g/sec, Purge duty cycle over 0%, and the PCM detected the average of the Long Term fuel trim values was more than -14% during the Fuel System Monitor test.

Possible Causes:



Base engine "mechanical" fault affecting one or more cylinders
 
EVAP system component has failed or canister fuel saturated
 
Fuel control sensor is out of calibration (i.e., ECT, IAT or MAP)
 
Fuel delivery system supplying too much fuel during cruise or idle periods (e.g., faulty fuel pump, or faulty pressure regulator)
 
Fuel injector(s) is leaking or stuck partially open (one or more)
 
HO2S is contaminated, deteriorated or it has failed
 

 
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