Corvette 1997-2005

6.0L V8 VIN U Auto

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6.0L V8 VIN U Auto

Trouble Code: P0169



Fuel Composition Sensor Circuit Malfunction

Possible Causes:



FCS is contaminated, damaged or skewed
 
Fuel is contaminated due to a higher than normal alcohol level
 
Ethanol concentration is higher than 85% (E85)
 
Methanol fuel is not recommended, and can cause this code
 

Trouble Code: P0562



System Voltage Too Low

Possible Causes:



Check for high resistance at battery connections or the MINI fuse power circuit
 
Check the drive belt for excessive wear and the proper tension
 
Check the condition of the battery and the Generator output
 
Vehicle may have been used to jump-start another vehicle
 

Trouble Code: P0563



System Voltage Too High

Possible Causes:



Check the condition of the battery (it may be worn out)
 
Test the operation of the Generator (it may have failed)
 
Vehicle may have been used to jump-start another vehicle
 

Trouble Code: P0601



Control Module ROM Malfunction

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

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

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

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

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

Possible Causes:



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

Trouble Code: P0608



Vehicle Speed Output Circuit Malfunction

Possible Causes:



VSS output signal circuit is open, shorted to ground or to power
 
VSS output signal problem related to the Instrument Cluster or the Electronic Suspension Control Module (internal problem)
 
PCM has failed
 

Trouble Code: P0711



TFT Sensor Range/Performance (4L60-E, 4L80-E)

Possible Causes:



ATF fluid level too low or the fluid is contaminated or burnt
 
TFT sensor is contaminated, damaged or "skewed"
 
PCM has failed
 

Trouble Code: P1275



Accelerator Pedal Position Sensor 1 Circuit Malfunction

Possible Causes:



APP1 sensor connector is contaminated, oily or contains water
 
APP1 sensor signal, ground or VREF circuit high resistance
 
APP1 sensor VREF circuit is open, shorted to ground or to B+
 
APP1 sensor signal or ground circuit has high resistance
 
APP1 sensor is damaged or has failed
 
TAC module is damaged or has failed
 

Trouble Code: P1276



Accelerator Pedal Position Sensor 1 Range/Performance

Possible Causes:



APP1 sensor connector is contaminated, oily or contains water
 
APP1 sensor signal circuit is open or shorted to ground
 
APP1 sensor signal circuit is shorted to VREF or system power
 
APP1 sensor ground circuit is open or has high resistance
 
APP1 sensor VREF circuit is open or shorted to ground
 
APP1 sensor is damaged or has failed
 

Trouble Code: P1280



Accelerator Pedal Position Sensor 2 Circuit Malfunction

Possible Causes:



APP2 sensor connector is contaminated, oily or contains water
 
APP2 sensor signal, ground or VREF circuit high resistance
 
APP2 sensor VREF circuit is open, shorted to ground or to B+
 
APP2 sensor signal or ground circuit has high resistance
 
APP2 sensor is damaged or has failed
 
TAC module is damaged or has failed
 

Trouble Code: P1281



Accelerator Pedal Position Sensor 2 Range/Performance

Possible Causes:



TP2 sensor connector is contaminated, oily or contains water
 
TP2 sensor signal, ground or VREF circuit has high resistance
 
TP2 sensor VREF circuit is open, shorted to ground or to B+
 
TP2 sensor signal or ground circuit has high resistance
 
TP2 sensor is damaged or has failed
 
TAC module is damaged or has failed
 

Trouble Code: P1285



Accelerator Pedal Position Sensor 3 Circuit Malfunction

Possible Causes:



APP3 sensor connector is contaminated, oily or contains water
 
APP3 sensor signal, ground or VREF circuit high resistance
 
APP3 sensor VREF circuit is open, shorted to ground or to B+
 
APP3 sensor signal or ground circuit has high resistance
 
APP3 sensor or the TAC module is damaged or has failed
 

Trouble Code: P1286



Accelerator Pedal Position Sensor 3 Range/Performance

Possible Causes:



APP3 sensor connector is contaminated, oily or moisture
 
APP3 sensor signal, ground or VREF circuit high resistance
 
APP3 sensor signal or ground circuit has high resistance
 
APP3 sensor or the TAC module is damaged or 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: P1518



Throttle Actuator Control Module Serial Data Malfunction

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 circuit. Inspect the Brake & Cruise fuses first.
 
TSB 03-04-06-032 contains a repair procedure for this code
 

Trouble Code: P1638



Generator 'F' Terminal Circuit Malfunction

Possible Causes:



Generator connector is damaged or has high resistance
 
Generator field duty cycle signal circuit is open or shorted
 
Generator is damaged or has failed
 
PCM has failed
 

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
 

Trouble Code: U1026



No Communication With Transfer Case Shift Control Module

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

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

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

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)

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

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

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

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

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

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: U1305



Class 2 Data Link High or Low

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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