Avalanche, Sierra, Silverado, C&K Series, 1999-2005

6.6L V8 VIN 2 Auto 1

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6.6L V8 VIN 2 Auto

Trouble Code: P0005



Camshaft Phasing System Malfunction

Possible Causes:



AF lock-off relay circuit to the HPL solenoid is open
 
HPL solenoid control circuit is open, shorted or grounded
 
HPL solenoid is damaged or it has failed
 
PCM has failed
 

Trouble Code: P0148



A/F Enable Circuit Malfunction

Possible Causes:



AF enable circuit is open, shorted to ground
 
AF enable circuit is shorted to system power (B+)
 
FICM connector is damaged, open or shorted
 
FICM assembly had failed, or the PCM has failed
 

Trouble Code: P0171



Fuel Trim System Lean (Bank 1)

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 failed
 
HO2S element is contaminated, deteriorated or has failed
 
Vacuum hose is disconnected, broken, leaking or loose
 

Trouble Code: P0172



Fuel Trim System Rich (Bank 1)

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)
 
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
 

Trouble Code: P0174



Fuel Trim System Lean (Bank 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 failed
 
HO2S element is contaminated, deteriorated or has failed
 
Vacuum hose is disconnected, broken, leaking or loose
 

Trouble Code: P0175



Fuel Trim System Rich (Bank 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 delivery system supplying too much fuel at cruise or idle periods (faulty regulator)
 
Fuel injector(s) is leaking or stuck partially open (one or more)
 
HO2S is contaminated, deteriorated or it has failed
 

Trouble Code: P0182



Fuel Tank Temperature Sensor Circuit Low Input

Possible Causes:



FTT sensor signal circuit is shorted to chassis or sensor ground
 
FTT sensor is damaged, skewed or it has failed
 
PCM has failed
 

Trouble Code: P0183



Fuel Tank Temperature Sensor Circuit High Input

Possible Causes:



FTT sensor signal circuit or ground circuit is open
 
FTT sensor signal circuit is shorted to VREF
 
FTT sensor is damaged, skewed or it has failed
 
PCM has failed
 

Trouble Code: P0187



Fuel Rail Temperature Sensor Circuit Low Input

Possible Causes:



FRT sensor signal circuit shorted to chassis or sensor ground
 
FRT sensor is damaged, skewed or it has failed
 
PCM has failed
 

Trouble Code: P0188



Fuel Rail Temperature Sensor Circuit High Input

Possible Causes:



FRT sensor signal circuit or ground circuit is open
 
FRT sensor signal circuit is shorted to VREF
 
FRT sensor is damaged, skewed or it has failed
 
PCM has failed
 

Trouble Code: P0191



Fuel Rail Pressure Sensor Circuit Low Input

Possible Causes:



FRP Sensor 5v VREF circuit has a high resistance condition
 
FRP sensor signal circuit has a high resistance condition
 
FRP sensor is damaged or it has failed
 
PCM has failed
 

Trouble Code: P0192



Fuel Rail Pressure Sensor Circuit Low Input

Possible Causes:



FRP sensor 5-volt power circuit is open or shorted to ground
 
FRP Sensor signal circuit is shorted to ground
 
FRP Sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0193



Fuel Rail Pressure Sensor Circuit High Input

Possible Causes:



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

Trouble Code: P0201



Fuel Injector 1 Control Circuit Malfunction

Possible Causes:



Fuel injector 1 control circuit is open, shorted to ground or shorted to power
 
Fuel injector 1 is damaged or it has failed, or the connector is damaged
 
FICM (module) has failed
 

Trouble Code: P0202



Fuel Injector 2 Control Circuit Malfunction

Possible Causes:



Fuel injector 2 control circuit is open, shorted to ground or shorted to power
 
Fuel injector 2 is damaged or it has failed, or the connector is damaged
 
FICM (module) has failed
 

Trouble Code: P0203



Fuel Injector 3 Control Circuit Malfunction

Possible Causes:



Fuel injector 3 control circuit is open, shorted to ground or shorted to power
 
Fuel injector 3 is damaged or it has failed, or the connector is damaged
 
FICM (module) has failed
 

Trouble Code: P0204



Fuel Injector 4 Control Circuit Malfunction

Possible Causes:



Fuel injector 4 control circuit is open, shorted to ground or shorted to power
 
Fuel injector 4 is damaged or it has failed, or the connector is damaged
 
FICM (module) has failed
 

Trouble Code: P0205



Fuel Injector 5 Control Circuit Malfunction

Possible Causes:



Fuel injector 5 control circuit is open, shorted to ground or shorted to power
 
Fuel injector 5 is damaged or it has failed, or the connector is damaged
 
FICM (module) has failed
 

Trouble Code: P0206



Fuel Injector 6 Control Circuit Malfunction

Possible Causes:



Fuel injector 6 control circuit is open, shorted to ground or shorted to power
 
Fuel injector 6 is damaged or it has failed, or the connector is damaged
 
FICM (module) has failed
 

Trouble Code: P0207



Fuel Injector 7 Control Circuit Malfunction

Possible Causes:



Fuel injector 7 control circuit is open, shorted to ground or shorted to power
 
Fuel injector 7 is damaged or it has failed, or the connector is damaged
 
FICM (module) has failed
 

Trouble Code: P0208



Fuel Injector 8 Control Circuit Malfunction

Possible Causes:



Fuel injector 8 connector is damaged, loose or shorted
 
Fuel injector 8 control circuit is open, shorted to ground or shorted to power
 
Fuel injector 8 is damaged or it has failed
 
FICM (module) has failed
 

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: P0611



Control Module Performance

Possible Causes:



FICM is damaged
 

Trouble Code: P1020



Camshaft Phasing System Malfunction

Possible Causes:



AF fuel mode relay circuit (odd bank, even bank) is open
 
AF enable circuit is open or shorted to ground
 
FICM is damaged or it has failed
 

Trouble Code: P1021



CNG Fuel Injector 1 Circuit Malfunction

Possible Causes:



CNG fuel injector 1 control circuit is open or shorted to ground
 
CNG fuel injector 1 is damaged or it has failed
 
FICM has failed
 

Trouble Code: P1022



CNG Fuel Injector 2 Circuit Malfunction

Possible Causes:



CNG fuel injector 2 control circuit is open or shorted to ground
 
CNG fuel injector 2 is damaged or it has failed
 
FICM has failed
 

Trouble Code: P1023



CNG Fuel Injector 3 Circuit Malfunction

Possible Causes:



CNG fuel injector 3 control circuit is open or shorted to ground
 
CNG fuel injector 3 is damaged or it has failed
 
FICM has failed
 

Trouble Code: P1024



CNG Fuel Injector 4 Circuit Malfunction

Possible Causes:



CNG fuel injector 4 control circuit is open or shorted to ground
 
CNG fuel injector 4 is damaged or it has failed
 
FICM has failed
 

Trouble Code: P1025



CNG Fuel Injector 5 Circuit Malfunction

Possible Causes:



CNG fuel injector 5 control circuit is open or shorted to ground
 
CNG fuel injector 5 is damaged or it has failed
 
FICM has failed
 

Trouble Code: P1026



CNG Fuel Injector 6 Circuit Malfunction

Possible Causes:



CNG fuel injector 6 control circuit is open or shorted to ground
 
CNG fuel injector 6 is damaged or it has failed
 
FICM has failed
 

Trouble Code: P1027



CNG Fuel Injector 7 Circuit Malfunction

Possible Causes:



CNG fuel injector 7 control circuit is open or shorted to ground
 
CNG fuel injector 7 is damaged or it has failed
 
FICM has failed
 

Trouble Code: P1028



CNG Fuel Injector 8 Circuit Malfunction

Possible Causes:



CNG fuel injector 8 control circuit is open or shorted to ground
 
CNG fuel injector 8 is damaged or it has failed
 
FICM has failed
 

Trouble Code: P1207



FICM PWM Signal To PCM Circuit Malfunction

Possible Causes:



FICM sensor PWM signal circuit is open or shorted to ground
 
FICM is damaged or it has failed
 
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: P1432



Fuel Pressure Sensor Circuit Low Input

Possible Causes:



Fuel tank pressure sensor is sticking or it is damaged
 
Fuel tank pressure sensor signal circuit is shorted to ground
 
Fuel tank pressure sensor is damaged or it has failed
 
PCM has failed
 

 
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