Express, Savana, G1500, G2500, G3500, 1998-2005

6.0L V8 VIN U Auto 2

Imprimir

Trouble Code: P0175



Fuel Trim System Rich (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: P0178



Fuel Composition Sensor Low Frequency

Possible Causes:



FCS signal circuit is open or shorted to ground
 
FCS power circuit is open (check power from the ECMI fuse)
 
FCS ground circuit is open between the sensor and the PCM
 
FCS is damaged or has failed
 
PCM is damaged
 

Trouble Code: P0179



Fuel Composition Sensor High Frequency

Possible Causes:



FCS signal circuit is shorted to system power
 
FCS is damaged or has failed
 
PCM is damaged
 

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: P0200



Fuel Injector Circuit Malfunction

Possible Causes:



Fuel injector control circuit is open between injector and PCM
 
Fuel injector control circuit is grounded between injector and PCM
 
Fuel injector power circuit is open (test INJ A, B in fuse block)
 
Fuel injector is damaged or has failed
 
PCM is damaged
 

Trouble Code: P0230



Fuel Pump Relay Control Circuit Malfunction

Possible Causes:



Fuel pump relay control circuit is open or shorted to ground
 
Fuel pump relay power circuit is open (PCM Fuse B fuse block)
 
Fuel pump relay is damaged or it has failed
 
PCM is damaged
 

Trouble Code: P0300



Multiple Cylinder Misfire Detected

Possible Causes:



Base engine mechanical fault that affects one or more cylinders
 
EGR valve is stuck open or PCV system has a vacuum leak
 
EVAP system problem or the EVAP canister is fuel saturated
 
Fuel metering fault that affects more than one cylinder
 
Fuel pressure too low or too high, fuel supply contaminated
 
Ignition system fault (a coil) that affects more than one cylinder
 
MAF sensor contamination (it can cause a very lean condition)
 

Trouble Code: P0404



EGR Open Position Signal Range/Performance

Possible Causes:



EGR sensor signal circuit is open, shorted to ground or power
 
EGR sensor ground or VREF circuit is open
 
EGR valve seat or pintle contains debris or carbon (inspect and clean)
 
EGR valve is contaminated, clogged, damaged or has failed
 
PCM has failed
 

Trouble Code: P0405



EGR Position Sensor Circuit Low Input

Possible Causes:



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

Trouble Code: P0420



Catalyst System Low Efficiency (Bank 1)

Possible Causes:



Air leaks at the exhaust manifold or in the exhaust pipes
 
Base engine problems (i.e., high engine oil or coolant usage)
 
Catalytic converter is damaged, contaminated or has failed
 
Continuous engine misfire conditions, or weak or low coil output
 
Front HO2S or rear HO2S is contaminated with fuel or moisture
 
Rear HO2S is loose in the mounting hole (check it for a leak)
 
TSB 81-65-37 contains a repair procedure for this code
 

Trouble Code: P0430



Catalyst System Low Efficiency (Bank 2)

Possible Causes:



Air leaks at the exhaust manifold or in the exhaust pipes
 
Base engine problems (i.e., high engine oil or coolant usage)
 
Catalytic converter is damaged, contaminated or has failed
 
Continuous engine misfire conditions, or weak or low coil output
 
Front HO2S or rear HO2S is contaminated with fuel or moisture
 
Rear HO2S is loose in the mounting hole (check it for a leak)
 
TSB 81-65-37 contains a repair procedure for this code
 

Trouble Code: P0442



EVAP System Small Leak (0.040") Detected

Possible Causes:



Charcoal canister is loaded with fuel or moisture
 
Fuel filler cap is loose, cross-threaded, damaged or wrong part
 
Fuel tank, fuel filler neck or fuel sending unit 'O' ring is leaking
 
Fuel tank pressure sensor is damaged, disconnected or it failed
 
Fuel tank or purge valve vapor lines clogged or disconnected
 
Purge solenoid or Vent solenoid has a small leaking (sticking)
 
PCM has failed
 

Trouble Code: P0443



EVAP Purge Solenoid Control Circuit Malfunction

Possible Causes:



Purge solenoid control circuit is open or shorted to ground
 
Purge solenoid control circuit is shorted to system power (B+)
 
Purge solenoid power circuit is open (test the ENG1 fuse)
 
Purge solenoid is damaged or has failed
 
PCM has failed
 

Trouble Code: P0446



EVAP Vent System Performance

Possible Causes:



EVAP vent fresh air hose is clogged, kinked or restricted
 
EVAP Vent solenoid is contaminated, damaged or has failed
 
EVAP Canister plugged or severely restricted
 
Fuel Cap or EVAP Service Port leaking
 
Fuel vapor lines or purge lines damaged or leaking
 
FTP sensor is out-of-calibration, damaged or "skewed"
 
PCM has failed
 
TSB 02-06-04-037 contains a repair procedure for this code
 

Trouble Code: P0449



EVAP Vent Solenoid Control Circuit Malfunction

Possible Causes:



Vent solenoid control circuit is open or shorted to ground
 
Vent solenoid control circuit is shorted to system power (B+)
 
Vent solenoid power circuit is open (test the ENG1 fuse)
 
Vent solenoid is damaged or has failed
 
PCM has failed
 

Trouble Code: P0452



Fuel Tank Pressure Sensor Circuit Low Input

Possible Causes:



FTP sensor connector is damaged or shorted
 
FTP sensor signal circuit is open or shorted to ground
 
FTP sensor VREF circuit is open or shorted to ground
 
FTP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0453



Fuel Tank Pressure Sensor Circuit High Input

Possible Causes:



FTP sensor connector is damaged, loose or open
 
FTP sensor signal circuit is shorted to VREF (5v)
 
FTP sensor ground circuit is open between sensor and PCM
 
FTP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0455



EVAP System Large Leak (0.080") Detected

Possible Causes:



Fuel filler cap is very loose, missing or the wrong part
 
Fuel tank, fuel filler neck or fuel sending unit 'O' ring is leaking
 
Fuel tank pressure sensor is damaged, disconnected or it failed
 
Fuel tank vapor line(s) is clogged, damaged or disconnected
 
Purge valve vapor line is clogged, damaged, or disconnected
 
Purge solenoid is not opening (it may be damaged or sticking)
 
Vent solenoid is not closing (it may be damaged or sticking)
 
PCM has failed
 

Trouble Code: P0463



Fuel Level Sensor High Input

Possible Causes:



Fuel level sensor signal circuit is shorted to system power
 
Fuel level sensor ground circuit is open
 
Fuel level sender is damaged, binding or not aligned properly
 
PCM has failed
 

Trouble Code: P0496



EVAP Canister Purge System High Purge Flow

Possible Causes:



EVAP charcoal canister is damaged or restricted
 
EVAP purge pipe is damaged or restricted
 
FTP sensor is damaged or it has failed
 
Purge solenoid is damaged (it may be sticking)
 
Purge solenoid valve has failed
 

Trouble Code: P0502



VSS Circuit Low Input (4L60-E, 4L80-E)

Possible Causes:



Output shaft rotor is chipped or damaged
 
OSS tip contains debris or metal shavings (an intermittent fault)
 
OSS positive (+) signal circuit is open or shorted to ground
 
OSS negative (-) signal circuit is open or shorted to ground
 
OSS is damaged or has failed (an intermittent fault)
 

Trouble Code: P0503



Title: VSS Circuit Malfunction (4L60-E, 4L80-E)

Possible Causes:



Output shaft rotor is chipped or damaged (intermittent fault)
 
OSS tip contains debris or metal shavings (an intermittent fault)
 
OSS (+) signal circuit is open or shorted to ground (intermittent)
 
OSS (-) signal circuit is open or shorted to ground (intermittent)
 
OSS is damaged or has failed (an intermittent fault)
 

Trouble Code: P0506



Idle Speed Too Low

Possible Causes:



Air inlet duct is collapsed, loose or air filter element is clogged
 
Base engine problem (i.e., compression or misfire condition)
 
IAC solenoid control circuit has a high resistance condition
 
IAC valve is damaged or has failed
 
Idle air inlet passage or throttle bore is dirty or full of deposits
 
MAF sensor is dirty, out-of-calibration or it is "skewed"
 
PCM has failed
 

Trouble Code: P0507



Idle Speed Too High

Possible Causes:



Engine vacuum leaks, PCM valve is leaking or the wrong valve
 
Idle air inlet passage or throttle bore is dirty or full of deposits
 
IAC valve is damaged or has failed
 
MAF sensor is dirty, "skewed" or installed improperly
 
Throttle plate, throttle shaft or linkage is damaged or sticking
 
TP sensor is out-of-range or "skewed" high
 
PCM has failed
 

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: P0605



Control Module Programming Read Only Memory

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: P0641



5-Volt Reference 1 Circuit Malfunction

Possible Causes:



5v VREF circuit is shorted to chassis or sensor ground
 
5v VREF circuit to MAP or TP sensor circuit is shorted to (B+)
 
PCM has failed
 

 
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