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

6.5L V8 VIN F Std 1

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6.5L V8 VIN F Std

Trouble Code: P0112



IAT Sensor Circuit Low Input

Possible Causes:



IAT sensor signal circuit is shorted to sensor or chassis ground
 
IAT sensor is damaged or has failed (it may be shorted)
 
PCM has failed
 

Trouble Code: P0113



IAT Sensor Circuit High Input

Possible Causes:



IAT sensor signal circuit is open between the sensor and PCM
 
IAT sensor signal circuit is shorted to VREF or system power
 
IAT sensor is damaged or has failed (it may be open)
 
PCM has failed
 

Trouble Code: P0117



ECT Sensor Circuit Low Input

Possible Causes:



ECT sensor connector is damaged or shorted
 
ECT sensor signal circuit shorted to sensor or chassis ground
 
ECT sensor is damaged or has failed (it may be shorted)
 
PCM has failed
 

Trouble Code: P0118



ECT Sensor Circuit High Input

Possible Causes:



ECT sensor signal circuit is open between the sensor and PCM
 
ECT sensor signal circuit is shorted to VREF or system power
 
ECT sensor is damaged or has failed (it may be open)
 
PCM has failed
 

Trouble Code: P0121



Accelerator Pedal Position Sensor 1 Performance

Possible Causes:



APP sensor circuit open or shorted to ground (intermittent)
 
APP sensor VREF circuit is open or shorted (intermittent fault)
 
APP sensor is damaged or it failed (may be cracked or sticking)
 

Trouble Code: P0122



Accelerator Pedal Position Sensor 1 Circuit Low Input

Possible Causes:



APP sensor signal circuit shorted to chassis or sensor ground
 
APP sensor is damaged or it failed (it may be shorted)
 
PCM is damaged or has failed
 

Trouble Code: P0123



Accelerator Pedal Position Sensor 1 High Input

Possible Causes:



APP sensor signal circuit is shorted to VREF or system power
 
APP sensor ground circuit open between the sensor and PCM
 
APP sensor is damaged or it failed (it may be open)
 
PCM is damaged or has failed
 

Trouble Code: P0125



Coolant Temperature Insufficient For Stable Operation

Possible Causes:



Check the operation of the thermostat (it may be stuck open)
 
Coolant level is too low, or the coolant mixture is incorrect
 
ECT sensor signal circuit has a high resistance condition
 
ECT sensor is damaged or it has failed
 

Trouble Code: P0181



Fuel Temperature Sensor Circuit Low Input

Possible Causes:



FTS signal circuit is shorted to chassis or sensor ground
 
FTS is damaged, skewed or it has failed
 
PCM 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 Temperature Sensor Circuit High Input

Possible Causes:



FTS signal circuit is open between the sensor and the PCM
 
FTS ground circuit is open between the sensor and the PCM
 
FTS 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: P0215



Engine Shutoff Solenoid Control Circuit Malfunction

Possible Causes:



ESC control circuit is open or shorted to ground
 
ESO power circuit is open (test ECM fuse in fuse relay center)
 
PCM has failed
 
TSB 87-63-04 contains a repair procedure for this code
 

Trouble Code: P0216



Injection Timing Control Circuit

Possible Causes:



Injector Timing 1 high or low circuit is open or shorted to ground
 
Injector Timing 2 high or low circuit is open or shorted to ground
 
CKP sensor signal circuit has high resistance
 

Trouble Code: P0219



Engine Overspeed Condition

Possible Causes:



Fuel injection pump may need to be replaced
 
Fuel injection pump timing adjustment needs to be performed
 
PCM has failed
 

Trouble Code: P0221



Accelerator Pedal Position Sensor 2 Range/Performance

Possible Causes:



APP2 signal circuit is open or shorted to ground
 
APP2 sensor is binding, damaged or has failed
 
PCM is damaged
 

Trouble Code: P0222



Accelerator Pedal Position Sensor 2 Low Input

Possible Causes:



APP2 signal circuit is shorted to chassis or sensor ground
 
APP2 VREF circuit has a high resistance condition (low VREF)
 
APP2 sensor is damaged or has failed
 
PCM is damaged
 

Trouble Code: P0223



Accelerator Pedal Position Sensor 2 High Input

Possible Causes:



APP2 sensor signal circuit is open between sensor and PCM
 
APP2 sensor signal circuit is shorted to sensor VREF
 
APP2 sensor ground circuit is open between sensor and PCM
 
APP sensor is damaged or has failed
 
PCM is damaged
 

Trouble Code: P0225



Accelerator Pedal Position Sensor 3 Circuit Malfunction

Possible Causes:



APP VREF signal is open or grounded between the sensor and the PCM
 
APP VREF signal is grounded between the sensor and PCM
 
APP sensor is damaged or has failed
 
PCM is damaged
 

Trouble Code: P0226



Accelerator Pedal Position Sensor 3 Range/Performance

Possible Causes:



APP3 signal circuit is open or shorted to ground
 
APP3 sensor is binding, damaged or has failed
 
PCM is damaged
 

Trouble Code: P0227



Accelerator Pedal Position Sensor 3 Low Input

Possible Causes:



APP3 signal circuit is shorted to chassis or sensor ground
 
APP3 VREF circuit has a high resistance condition (low VREF)
 
APP3 sensor is damaged or has failed
 
PCM is damaged
 

Trouble Code: P0228



Accelerator Pedal Position Sensor 3 High Input

Possible Causes:



APP3 sensor signal circuit is open between sensor and PCM
 
APP3 sensor signal circuit is shorted to VREF or system power
 
APP3 sensor ground circuit is open between sensor and PCM
 
APP sensor is damaged or has failed
 
PCM is damaged
 

Trouble Code: P0231



Fuel Pump Feedback Circuit Low Input

Possible Causes:



Fuel pump feedback Circuit 120 is open or shorted to ground
 
Fuel pump relay power circuit is open, or the relay is damaged
 
Fuel pump relay control circuit is open or shorted to power
 
PCM is damaged
 

Trouble Code: P0236



Turbocharger Boost System Performance

Possible Causes:



Engine vacuum line is loose, open or pinched, or misrouted
 
Engine source vacuum restricted where vacuum line connects
 
Turbocharger solenoid vent filter or vent orifice is restricted (the vacuum to the solenoid should fluctuate in normal operation)
 

Trouble Code: P0237



Turbocharger Boost Circuit Low Input

Possible Causes:



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

Trouble Code: P0238



Turbocharger Boost Circuit High Input

Possible Causes:



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

Trouble Code: P0251



Injection Pump Camshaft System Malfunction

Possible Causes:



CMP sensor signal circuit is open or shorted (intermittent fault)
 
Vehicle driven during hard vehicle maneuvers while low on fuel, or run until out of fuel
 
PCM has failed
 

Trouble Code: P0263



Cylinder 1 Balance System Malfunction

Possible Causes:



Injector 1 fuel nozzle dirty, damaged or restricted
 
Fuel feed lines between the tank and fuel pump are restricted
 
Fuel filter id contaminated, dirty or clogged
 

 
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