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

6.5L V8 VIN F Std 2

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Trouble Code: P0269



Cylinder 3 Balance System Malfunction

Possible Causes:



Injector 3 fuel nozzle dirty, damaged or restricted
 
Fuel feed lines between the tank and fuel pump are restricted
 
Fuel filter id contaminated, dirty or clogged
 

Trouble Code: P0272



Cylinder 4 Balance System Malfunction

Possible Causes:



Injector 4 fuel nozzle dirty, damaged or restricted
 
Fuel feed lines between the tank and fuel pump are restricted
 
Fuel filter id contaminated, dirty or clogged
 

Trouble Code: P0275



Cylinder 5 Balance System Malfunction

Possible Causes:



Injector 5 fuel nozzle dirty, damaged or restricted
 
Fuel feed lines between the tank and fuel pump are restricted
 
Fuel filter id contaminated, dirty or clogged
 

Trouble Code: P0278



Cylinder 6 Balance System Malfunction

Possible Causes:



Injector 6 fuel nozzle dirty, damaged or restricted
 
Fuel feed lines between the tank and fuel pump are restricted
 
Fuel filter id contaminated, dirty or clogged
 

Trouble Code: P0281



Cylinder 7 Balance System Malfunction

Possible Causes:



Injector 7 fuel nozzle dirty, damaged or restricted
 
Fuel feed lines between the tank and fuel pump are restricted
 
Fuel filter id contaminated, dirty or clogged
 

Trouble Code: P0284



Cylinder 8 Balance System Malfunction

Possible Causes:



Injector 8 fuel nozzle dirty, damaged or restricted
 
Fuel feed lines between the tank and fuel pump are restricted
 
Fuel filter id contaminated, dirty or clogged
 

Trouble Code: P0300



Multiple Cylinder Misfire Detected

Possible Causes:



Base engine mechanical fault that affects one or more cylinders
 
Fuel injection (high pressure) nozzles or fuel lines leaking
 
Fuel injection nozzles stuck closed, dirty or restricted
 

Trouble Code: P0301



Cylinder 1 Misfire Detected

Possible Causes:



Base engine mechanical fault that affects only Cylinder 1
 
Fuel injection (high pressure) nozzle leaking only on Cylinder 1
 
Fuel injection nozzle stuck closed or dirty affecting Cylinder 1
 

Trouble Code: P0302



Cylinder 2 Misfire Detected

Possible Causes:



Base engine mechanical fault that affects only Cylinder 2
 
Fuel injection (high pressure) nozzle leaking only on Cylinder 2
 
Fuel injection nozzle stuck closed or dirty affecting Cylinder 2
 

Trouble Code: P0303



Cylinder 3 Misfire Detected

Possible Causes:



Base engine mechanical fault that affects only Cylinder 3
 
Fuel injection (high pressure) nozzle leaking only on Cylinder 3
 
Fuel injection nozzle stuck closed or dirty affecting Cylinder 3
 

Trouble Code: P0304



Cylinder 4 Misfire Detected

Possible Causes:



Base engine mechanical fault that affects only Cylinder 4
 
Fuel injection (high pressure) nozzle leaking only on Cylinder 4
 
Fuel injection nozzle stuck closed or dirty affecting Cylinder 4
 

Trouble Code: P0305



Cylinder 5 Misfire Detected

Possible Causes:



Base engine mechanical fault that affects only Cylinder 5
 
Fuel injection (high pressure) nozzle leaking only on Cylinder 5
 
Fuel injection nozzle stuck closed or dirty affecting Cylinder 5
 

Trouble Code: P0306



Cylinder 6 Misfire Detected

Possible Causes:



Base engine mechanical fault that affects only Cylinder 6
 
Fuel injection (high pressure) nozzle leaking only on Cylinder 6
 
Fuel injection nozzle stuck closed or dirty affecting Cylinder 6
 

Trouble Code: P0307



Cylinder 7 Misfire Detected

Possible Causes:



Base engine mechanical fault that affects only Cylinder 7
 
Fuel injection (high pressure) nozzle leaking only on Cylinder 7
 
Fuel injection nozzle stuck closed or dirty affecting Cylinder 7
 

Trouble Code: P0308



Cylinder 8 Misfire Detected

Possible Causes:



Base engine mechanical fault that affects only Cylinder 8
 
Fuel injection (high pressure) nozzle leaking only on Cylinder 8
 
Fuel injection nozzle stuck closed or dirty affecting Cylinder 8
 

Trouble Code: P0335



CKP Sensor Signal Range/Performance

Possible Causes:



CKP sensor signal circuit is open or shorted to ground
 
CKP sensor VREF circuit is open between the sensor and PCM
 
CKP sensor ground circuit is open
 
CKP sensor is damaged or it failed (check crankshaft sprocket)
 
PCM has failed
 

Trouble Code: P0370



Timing Reference High-Resolution System Performance

Possible Causes:



Optical fuel temperature sensor circuit has a problem
 
PCM has failed
 
Vehicle driven in an aggressive manner while low on fuel
 

Trouble Code: P0380



Glow Plug Range/Performance

Possible Causes:



Glow plug relay control circuit is open, shorted to power, or the ground circuit is open
 
Glow plug relay is stuck in "on" position causing constant power
 
Glow plug relay is damaged or has failed
 
PCM has failed
 

Trouble Code: P0405



EGR Control BARO Sensor Circuit Low Input

Possible Causes:



EGR BARO sensor signal circuit is open
 
EGR BARO sensor signal circuit is shorted to ground
 
EGR BARO sensor VREF circuit is open or shorted to ground
 
EGR BARO sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0406



EGR Control BARO Sensor Circuit Low Input

Possible Causes:



EGR BARO sensor signal circuit is shorted to VREF or power
 
EGR BARO sensor ground circuit is open
 
EGR BARO sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0500



Vehicle Speed Sensor Circuit Malfunction

Possible Causes:



Output shaft rotor is chipped or damaged
 
Output shaft rotor is not aligned properly with the VSS unit
 
VSS tip contains debris or metal shavings (an intermittent fault)
 
VSS positive (+) signal circuit is open or shorted to ground
 
VSS negative (-) signal circuit is open or shorted to ground
 
VSS is damaged or has failed
 

Trouble Code: P0501



Vehicle Speed Sensor Range/Performance (4L60-E)

Possible Causes:



Output shaft rotor is chipped or damaged
 
Output shaft rotor is not aligned properly with the VSS unit
 
VSS tip contains debris or metal shavings (an intermittent fault)
 
VSS positive (+) signal circuit is open or shorted to ground
 
VSS negative (-) signal circuit is open or shorted to ground
 
VSS buffer is damaged, or one of the buffer circuits has failed
 
VSS is damaged or has failed
 

Trouble Code: P0560



System Voltage Malfunction

Possible Causes:



Check for high resistance at the battery connections or at the Underhood Fuse Block power circuit connection to the PCM
 
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: P0567



Cruise Control Resume Switch Circuit Malfunction

Possible Causes:



C/C resume switch is shorted to VREF or system power
 
C/C resume switch is stuck in the "on" position or has failed
 
PCM has failed
 

Trouble Code: P0568



Cruise Control Set Switch Circuit Malfunction

Possible Causes:



Set/Coast switch circuit is shorted to VREF or system power
 
Set/Coast switch is stuck in "on" position or it has failed
 
PCM has failed
 

Trouble Code: P0571



Cruise/Brake Switch Circuit Malfunction

Possible Causes:



Cruise brake switch signal circuit is shorted to ground
 
Cruise brake switch B+ circuit is open (test STOP/BRAKE fuse)
 
Cruise brake switch is damaged (closed) or 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: P1125



Accelerator Pedal Position System Malfunction

Possible Causes:



APP sensor connector contaminated with oil or moisture (this condition can cause signal "tracking" between the circuits)
 
When the TAC module detects a fault in this system, it may set more than one code (due to redundant tests running constantly)
 
Refer to the related TAC system trouble codes
 

Trouble Code: P1201



Gas Mass Sensor Range/Performance

Possible Causes:



Air filter or air inlet duct is clogged or restricted
 
Air leaks in the exhaust pipes or manifold, or the HO2S location
 
Base engine problem (i.e., engine compression, vacuum leak)
 
CNG system fuel pressure is incorrect
 
PCV system problem (i.e., PCV vacuum hose or valve leaking)
 
EVAP canister purge system malfunction
 
Gasoline contaminated engine oil
 
Fuel pressure regulator damage or leaking
 
PCM has failed
 

Trouble Code: P1214



Injection Pump Timing Offset

Possible Causes:



The PCM will only run the test if the TDC offset adjustment time set procedure has been activated. The vehicle will most likely not be brought in with this code in memory.
 
CKP sensor incorrectly installed or mounting tab is broken
 
Fuel injection pump is damaged or has failed (a new pump will need to be "timed" using the correct pump timing procedure)
 

Trouble Code: P1215



High Pressure Or Low Pressure Lockout, MIL, NGO Circuit Malfunction

Possible Causes:



Natural Gas Output Enable, High Pressure Lockout, Low Pressure Lockout or MIL control circuit is open, shorted to ground or shorted to system power
 
Alternative Fuels ECU is damaged or has failed
 

Trouble Code: P1216



Fuel Solenoid Response Time Too Short

Possible Causes:



Intermittent P0251, P0370, and P1216 codes may be caused by air entering the fuel system when fuel levels get below 1/8 of a tank during hard acceleration or turning maneuvers. Codes P0251, P0370, and P1216 may set if the vehicle has run out of fuel. Customer driving habits should be checked to determine if the vehicle has been performing in these manners. If the vehicle has performed in these conditions, bleed the fuel system of all air and then perform a complete vehicle test drive.
 
Injection pump timing circuit is open, shorted to ground or to B+
 
TSB 77-63-06A contains a repair procedure for this code
 

Trouble Code: P1217



Fuel Solenoid Response Time Too Long

Possible Causes:



Fuel solenoid driver power circuit is open (test FUEL SOL fuse)
 
Fuel solenoid high circuit is open or shorted to ground
 
Fuel solenoid low circuit is open
 
Fuel solenoid is damaged or has failed (solenoid may be weak)
 
Fuel solenoid driver has failed
 

Trouble Code: P1218



Injection Pump Calibration Circuit Malfunction

Possible Causes:



Fuel solenoid driver connections have a problem
 
Fuel solenoid is damaged or has failed
 
Fuel injection pump is damaged or has failed (a new pump will need to be "timed" using the correct pump timing procedure)
 

 
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