Aurora 2001-2003

3.5L V6 VIN H Auto 3

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Trouble Code: P0716



A/T Input Speed Sensor Circuit Malfunction (4T65-E)

Possible Causes:



ISS positive (+) circuit is open, shorted to ground or to power
 
ISS negative (-) circuit is open, shorted to ground or to power
 
ISS is damaged or has failed
 
PCM has failed
 
TSB 02-07-30-022A contains a repair procedure for this code
 

Trouble Code: P0717



A/T Input Speed Sensor Circuit Low Input (4T65-E)

Possible Causes:



ISS positive (+) circuit is open, shorted to ground or to power
 
ISS negative (-) circuit is open, shorted to ground or to power
 
ISS is damaged or has failed
 
PCM has failed
 
TSB 02-07-30-022A contains a repair procedure for this code
 

Trouble Code: P0719



TCC Brake Switch Circuit Low Input (4T60-E, 4T65-E)

Possible Causes:



TCC brake switch circuit is open or shorted to ground
 
TCC brake switch power circuit is open (check ABS PCM fuse)
 
TCC brake switch is out of adjustment or damaged
 
PCM has failed
 

Trouble Code: P0724



TCC Brake Switch Circuit High Input (4T65-E)

Possible Causes:



Check for ABS trouble codes (they can cause this code to set)
 
TCC brake switch circuit is shorted to system power
 
TCC brake switch is out of adjustment or damaged
 
PCM has failed
 

Trouble Code: P0730



Incorrect Gear Ratio (4T65-E)

Possible Causes:



ATF level is too low, or the fluid is burnt or contaminated
 
ISS or OSS signal circuit has an intermittent fault condition
 
Inspect for debris in the transmission pan or internal damaged
 
Possible vehicle overloading, exceeding the trailer towing limit, or towing in overdrive events occurred (discuss with customer)
 
TSB 02-07-30-022A contains a repair procedure for this code
 

Trouble Code: P0741



TCC System Stuck Off - Mechanical (4T65-E)

Possible Causes:



ATF level is too low, or the fluid is burnt or contaminated
 
Inspect transmission lines to radiator for bends or restrictions
 
Oil pressure screen is clogged or debris in the oil pan
 
TCC control valve is stuck "off" due to sediment or binding
 
TCC regulator valve is stuck "off" due to sediment or binding
 
TCC solenoid valve O-ring or turbine shaft seals leaking or cut
 
TSB 00-07-30-007A contains a repair procedure for this code
 

Trouble Code: P0742



Torque Converter Clutch Circuit Stuck On (4T65-E)

Possible Causes:



TCC PWM solenoid valve for the fluid exhaust is restricted
 
TCC regulated apply valve is stuck in the TCC apply position
 
TCC control valve is stuck in the TCC apply position
 
TCC feed limit valve is stuck (i.e., the TCC feed limit pressure, and the TCC release pressure to be low or nonexistent)
 
Pressure regulator valve is stuck
 
TCC fluid circuits leaking or abnormally low/high line pressure
 
TCC release switch circuit is shorted to ground
 
TSB 00-07-30-007A contains a repair procedure for this code
 

Trouble Code: P0748



Pressure Control Solenoid Circuit Malfunction (4T65-E)

Possible Causes:



PC solenoid high side circuit is open, shorted to ground or B+
 
PC solenoid low side circuit is open, shorted to ground or to B+
 
PC solenoid high or low side driver is damaged or has failed
 
TSB 00-07-30-002B contains a repair procedure for this code
 

Trouble Code: P0751



A/T 1-2 Shift Solenoid - No 1st or 4th Gear (4T65-E)

Possible Causes:



ATF is burnt or contaminated
 
Transmission has an internal malfunction.
 
Shift solenoid valve seals are damaged
 
Transmission has failed
 

Trouble Code: P0752



A/T 1-2 Shift Solenoid- No 2nd Or 3rd Gear (4T65-E)

Possible Causes:



ATF is burnt or contaminated
 
Transmission has plugged or restricted fluid circuits
 
Shift solenoid valve seals are leaking or damaged
 
Transmission has failed
 

Trouble Code: P0753



A/T 1-2/3 Shift Solenoid Circuit Malfunction (4T65-E)

Possible Causes:



1-2/3 shift solenoid control circuit is open or shorted to ground
 
1-2/3 shift solenoid control circuit is shorted to system power
 
1-2/3 shift solenoid is damaged or has failed
 
PCM has failed
 
TSB 02-07-30-022A contains a repair procedure for this code
 

Trouble Code: P0756



A/T 2-3 Shift Solenoid- No 2nd Or 3rd Gear (4T65-E)

Possible Causes:



ATF is burnt or contaminated
 
Transmission has plugged or restricted fluid circuits
 
Shift solenoid valve seals are leaking or damaged
 
Transmission has failed
 
TSB 02-07-30-13 contains a repair procedure for this code
 

Trouble Code: P0758



A/T 2-3 Shift Solenoid Circuit Malfunction (4T65-E)

Possible Causes:



2-3 shift solenoid control circuit is open or shorted to ground
 
2-3 shift solenoid control circuit is shorted to system power
 
2-3 shift solenoid power circuit is open (test TRANS SOL fuse)
 
2-3 shift solenoid is damaged or has failed
 
PCM has failed
 
TSB 02-07-30-022A contains a repair procedure for this code
 

Trouble Code: P1106



MAP Sensor Circuit Intermittent High Input

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
 
PCM has failed
 

Trouble Code: P1107



MAP Sensor Circuit Intermittent Low Input

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

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
 
TSB 02-06-03-005 contains a repair procedure for this code
 

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 Intermittent High Input

Possible Causes:



TP sensor connector is damaged, loose or open
 
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 High 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: 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: P1351



ICM Ignition Control Circuit High Input

Possible Causes:



ICM control circuit is open
 
ICM low reference (ground) circuit has high resistance condition
 
ICM is damaged or has failed
 
PCM has failed
 

Trouble Code: P1352



Ignition Control Bypass Circuit High Input

Possible Causes:



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

Trouble Code: P1361



ICM Ignition Control Circuit Low Input

Possible Causes:



IC timing control circuit is shorted to ground or shorted to power
 
IC module has failed
 
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: 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: P1810



TFP Valve Position Switch Assembly (4T65-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 & Long Term Shift (4T65-E)

Possible Causes:



Ask customer about overloading vehicle, exceeding trailer-towing limit, or towing in O/D
 
ATF level is low, or the fluid is contaminated or burnt
 
1-2 accumulator piston seals rolled or damaged
 
1-2 accumulator piston and pin missing, binding or damaged
 
Forward servo assembly damaged or misassembled
 
Oil pump assembly damaged or missing components
 
Spacer plate and gaskets damaged or misassembled
 
Driven sprocket support seals damaged or missing
 
2nd clutch piston and seal assembly binding or damaged
 
2nd clutch fiber and steel plates misassembled or damaged
 
Second clutch spring assembly damaged or misassembled
 
Forward band burned, damaged or misassembled
 
1-2 support roller clutch assembly damaged or misassembled
 

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: P1819



Internal Mode Switch - No Start (4T65-E)

Possible Causes:



Inspect transmission linkage (range selector to manual shift shaft) 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: P1822



Internal Mode Switch 'B' Circuit Low Input (4T65-E)

Possible Causes:



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

Trouble Code: P1823



Internal Mode Switch 'P' Circuit Low Input (4T65-E)

Possible Causes:



IMS Signal 'P' circuit is shorted to sensor or chassis ground
 
Transmission has internal problems / may need an overhaul
 

Trouble Code: P1825



Internal Mode Switch - Invalid Range (4T65-E)

Possible Causes:



IMS Signal 'A', 'B', 'C' and 'P' possible short to ground condition
 
IMS Signal 'A', 'B', 'C' and 'P' possible open or high resistance
 
Transmission has internal problems / may need an overhaul
 
PCM has failed
 

Trouble Code: P1826



Internal Mode Switch - Invalid Range (4T65-E)

Possible Causes:



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

Trouble Code: P1860



TCC PWM Solenoid Circuit Malfunction (4T65-E)

Possible Causes:



TCC solenoid control circuit is open, shorted to ground or shorted to system power (B+)
 
TCC solenoid power circuit is open (check the TRANS fuse)
 
TCC solenoid is damaged or has failed
 
PCM has failed
 
TSB 02-07-30-022A contains a repair procedure for this code
 

Trouble Code: P1887



TCC Release Switch Circuit Malfunction (4T65-E)

Possible Causes:



TCC release switch signal circuit is open
 
Turbine shaft O-ring seal leaks, oil seal rings missing/damaged.
 
TCC control valve damaged or No. 1 check ball is damaged
 
Spacer plate release exhaust blocked or case cover or spacer plate gaskets damaged
 
TSB 02-07-30-022A contains a repair procedure for this code
 

Trouble Code: U1000



Class 2 Communication Malfunction

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

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
 

 
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