Aurora 2001-2003

4.0L V8 VIN C Auto 4

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Trouble Code: P1114



ECT Sensor Circuit Intermittent Low Input

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

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: P1121



TP Sensor Circuit High Input (Intermittent)

Possible Causes:



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

Trouble Code: P1122



TP Sensor Circuit Intermittent Low Input

Possible Causes:



TP sensor signal circuit is shorted to ground (intermittent fault)
 
TP sensor VREF circuit is open or grounded (intermittent fault)
 
TP sensor is damaged or has failed (possible intermittent short)
 
PCM has failed
 

Trouble Code: P1133



HO2S-11 (Bank 1 Sensor 1) Insufficient Switching

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
 
HO2S heater element has failed, or the heater circuit is open
 
PCM has failed
 

Trouble Code: P1134



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

Possible Causes:



Air leaks present in the exhaust manifold or the exhaust pipes
 
HO2S may be contaminated (due to improper fuel or silicone)
 
HO2S signal low reference circuit has high resistance
 
HO2S heater element has failed, or the heater circuit is open
 
PCM has failed
 

Trouble Code: P1153



HO2S-21 (Bank 2 Sensor 1) Insufficient Switching

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
 
HO2S heater element has failed, or the heater circuit is open
 
MAP sensor or TP sensor is out-of-calibration or "skewed"
 
PCM has failed
 

Trouble Code: P1154



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

Possible Causes:



Air leaks present in the exhaust manifold or the exhaust pipes
 
HO2S may be contaminated (due to improper fuel or silicone)
 
HO2S signal low reference circuit has high resistance
 
HO2S heater element has failed, or the heater circuit is open
 
PCM has failed
 

Trouble Code: P1258



Engine Metal Over-Temperature Protection

Possible Causes:



Engine cooling system problem (test the cooling fan operation)
 
Engine coolant level is low or the mixture is not correct
 
ECT sensor is out-of-calibration or "skewed"
 

Trouble Code: P1336



CKP Sensor System Variation Not Learned

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 Crankshaft Position Variation Learn procedure on Scan Tool & start the vehicle.
 
Apply the brake pedal firmly and verify the selector is in Park.
 
Increase accelerator pedal position until fuel cutoff is reached at the test rpm (e.g., 5150). Quickly release the accelerator pedal after fuel cutoff is reached. The CKP system variation compensating values are learned when the engine speed (rpm) decreases back to idle speed and the procedure terminates.
 
Read the trouble codes and recheck for DTC P1336.
 
If DTC P1336 runs and passes, the CKP system variation "learn" procedure is complete. If not, look for other codes. If no codes are set, repeat the test procedure.
 

Trouble Code: P1359



Ignition Coil Group 1 Control Circuit Malfunction

Possible Causes:



IC control circuit for Coil Group 1 is open or shorted to power
 
ICM power or ground circuit is open or has high resistance
 
ICM is damaged or has failed
 
PCM has failed
 

Trouble Code: P1360



Ignition Coil Group 2 Control Circuit Malfunction

Possible Causes:



IC control circuit for Coil Group 2 is open or shorted to power
 
ICM power or ground circuit is open or has high resistance
 
ICM is damaged or has failed
 
PCM has failed
 

Trouble Code: P1372



Crankshaft Position Sensor A-B Correlation

Possible Causes:



CKP Sensor 'B' signal circuit is open, shorted to ground or shorted to system power (an intermittent fault may be present)
 
CKP Sensor 'B' is damaged or has failed (an intermittent fault)
 
ICM is damaged or has failed (an intermittent fault)
 

Trouble Code: P1380



Misfire Detected, Rough Road Data Not Available

Possible Causes:



The presence of this code (P1380) indicates the ABS/TCS system detected a fault that would not allow the EBTCM to transmit the correct rough road data to the PCM
 
Refer to Diagnostic System Check for Antilock Brake System
 

Trouble Code: P1381



Misfire Detected, No Communication With The EBCM

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 period when the EBCM could not communicate.
 
Refer to Diagnostic System Check for Antilock Brake System
 

Trouble Code: P1404



EGR Valve Closed Position Signal Range/Performance

Possible Causes:



EGR sensor signal circuit is open, shorted to ground or VREF
 
EGR sensor ground circuit is open or it has high resistance
 
EGR sensor is damaged or it has failed (sensor/solenoid unit)
 
EGR valve pintle or valve seat contains carbon deposits
 
PCM has failed
 

Trouble Code: P1415



Secondary Air Injection System (Bank 1) Malfunction

Possible Causes:



Air hoses disconnected, loose, kinked or failed (a burnt hose)
 
AIR pump is damaged or has failed (inspect air pump for water)
 
AIR system check valves and/or pipes are damaged or leaking
 
AIR check valve (in hose to vacuum bleed valve) stuck closed
 
PCM has failed
 

Trouble Code: P1441



EVAP System Flow During Non-Purge

Possible Causes:



EVAP purge valve, purge pipe, or the charcoal canister has a temporary blockage (this fault could cause an intermittent fault)
 
FTP sensor is out-of-calibration, damaged or it is skewed
 
EVAP purge solenoid valve is damaged or has failed
 
PCM has failed
 

Trouble Code: P1554



Cruise Control Feedback Circuit Malfunction

Possible Causes:



Cruise control inhibit circuit is open or shorted to ground
 
SMCC II cruise control module is damaged or has failed
 
PCM has failed
 

Trouble Code: P1560



Transaxle Not In Drive - Cruise Control Disabled

Possible Causes:



Review proper procedures to use to verify the shift lever is not placed in Neutral with Cruise Control "on" with the customer.
 

Trouble Code: P1564



Vehicle Acceleration Too High - Cruise Control Disabled

Possible Causes:



This code sets after a sudden rate of increase in vehicle speed occurs (i.e., vehicle speed sensing problem or traveling on icy roads) while the cruise is engaged, so it is necessary to check with the customer to verify the conditions present when it set.
 

Trouble Code: P1566



Engine Speed Too High - Cruise Control Disabled

Possible Causes:



Verify that there are not ABS/TCM trouble codes set
 
Verify that there are no TCM related trouble codes set
 
Discuss with the customer what conditions were present when this trouble code set so that it will not reoccur.
 

Trouble Code: P1567



Active Braking Control Active - Cruise Control Disabled

Possible Causes:



C/C brake switch is damaged or has failed
 
C/C set switch circuit is open or shorted to ground
 
C/C resume switch circuit is open or shorted to ground
 
C/C switch assembly is damaged or has failed
 
PCM has failed
 

Trouble Code: P1570



Traction Control Active - Cruise Control Disabled

Possible Causes:



Verify that there are no ABS/TCS trouble codes in memory
 
This trouble code is usually caused by conditions that cause traction control to activate during cruise control. Check with the customer to verify the conditions present when the code set.
 

Trouble Code: P1574



Stoplamp Switch Circuit Malfunction

Possible Causes:



Refer to Diagnostic Circuit Check for Antilock Brake Systems
 

Trouble Code: P1575



Extended Travel Brake Switch Circuit Malfunction

Possible Causes:



Brake switch circuit is open, shorted to ground or shorted to B+
 
Brake switch power circuit is open (test the IGN1 fuse)
 
Brake switch is out-of-adjustment, damaged or has failed
 
EBTCM has failed
 
TSB 01-06-03-009 contains a repair procedure for this code
 

Trouble Code: P1600



TCM Internal Watchdog Operation (4L60-E)

Possible Causes:



Power control relay circuit is open, shorted to ground or to B+
 
Power control relay is damaged or has failed
 
TCM has failed
 

Trouble Code: P1621



Control Module Long Term Memory Performance

Possible Causes:



Perform the Diagnostic System Check for the Engine Controls
 
PCM may have failed. Clear codes and then retest for the same code. If this codes resets, replace the PCM and reprogram it.
 

Trouble Code: P1624



Customer Snapshot - Data Available

Possible Causes:



Read and record any diagnostic trouble codes that are stored
 
Perform the Diagnostic System Check for Engine Controls
 

Trouble Code: P1633



Ignition Supplement Power (0) Switch Circuit Malfunction

Possible Causes:



Ignition OFF/RUN/CRANK circuit is open or shorted to power
 
Ignition switch is damaged or has failed
 
PCM has failed
 

Trouble Code: P1635



5-Volt Reference 1 Circuit Malfunction

Possible Causes:



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

Trouble Code: P1639



5-Volt Reference 2 Circuit Malfunction

Possible Causes:



ACP sensor VREF or FTP sensor VREF circuit is open, shorted to ground or to power
 
A/C refrigerant pressure or the Fuel Tank pressure sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P1680



Powertrain Control Module Internal Malfunction

Possible Causes:



Clear the codes and then recheck for this trouble code. If the same code resets, the PCM is damaged and must be replaced (and the new PCM must be programmed) to repair this code.
 

Trouble Code: P1681



Powertrain Control Module Internal Malfunction

Possible Causes:



Clear the codes and then recheck for this trouble code. If the same code resets, the PCM is damaged and must be replaced (and the new PCM must be programmed) to repair this code.
 

Trouble Code: P1683



Powertrain Control Module Internal Malfunction

Possible Causes:



Clear the codes and then recheck for this trouble code. If the same code resets, the PCM is damaged and must be replaced (and the new PCM must be programmed) to repair this code.
 

Trouble Code: P1810



TFP Valve Position Switch Malfunction (4T80-E)

Possible Causes:



Inspect the transmission linkage from the gear select lever to the manual valve for proper adjustment
 
TFP valve position switch signal circuit is open or grounded
 
TFP valve position switch circuit shorted to another signal
 
TFP valve position switch is damaged or has failed
 
PCM has failed
 

Trouble Code: P1811



Maximum Adaptive and Long Term Shift (4T80-E)

Possible Causes:



Ask the customer about overloading the vehicle, exceeding the trailer-towing limit, or towing while in Overdrive position.
 
ATF level is low, or the fluid is contaminated or burnt
 
The line pressure is too low
 
The pressure control solenoid valve is stuck "on" or pressure control solenoid valve has a broken clamp causing leakage.
 
The clutch plates (431 through 435) are burned or damaged.
 
The 2nd clutch piston assembly is cracked or damaged.
 
The 2nd clutch return spring and retainer assembly is damaged or out of position, or the 2nd clutch piston assembly seals are rolled, damaged or leaking.
 
The 2nd sprag clutch assembly is damaged or not holding.
 
The 1-2 shift solenoid valve stuck "on", or 1-2 shift valves (A & B) are stuck in 1st gear.
 

Trouble Code: P1814



Torque Converter Overstressed (4T65-E, 4T80-E)

Possible Causes:



ATF level is low or the fluid is burnt or contaminated
 
ATF filter is clogged or not properly installed/seated
 
Vehicle used for towing or driven while overloaded
 

Trouble Code: P1820



Internal Mode Switch 'A' Circuit Low Input (4T80-E)

Possible Causes:



IMS Signal 'A' circuit is shorted to ground
 
Transmission has internal problems / may need an overhaul
 

Trouble Code: P1822



Internal Mode Switch 'B' Circuit Low Input (4T80-E)

Possible Causes:



IMS Signal 'B' circuit is open or has a high resistance condition
 
Transmission has internal problems / may need an overhaul
 

 
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