Corvette 1997-2005

5.7L V8 VIN G Std 3

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Trouble Code: P0480



Cooling Fan Relay 1 Control Circuit Malfunction

Possible Causes:



Fan control relay control circuit is open or shorted to ground
 
Fan control relay control circuit is shorted to system power
 
Fan control relay power circuit is open (check Cool Fan 1 fuse)
 
Fan control relay is damaged or has failed
 
PCM has failed
 

Trouble Code: P0481



Cooling Fan Relay 2-3 Control Circuit Malfunction

Possible Causes:



Fan control relay control circuit is open or shorted to ground
 
Fan control relay control circuit is shorted to system power
 
Fan control relay power circuit is open or shorted to ground
 
Fan control relay 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: 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 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"
 
Throttle plate, throttle shaft or linkage is damaged or sticking
 
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: P0522



Engine Oil Pressure Sensor Circuit Low Input

Possible Causes:



Engine oil level it too low
 
EOP sensor signal circuit is open or shorted to ground
 
EOP sensor VREF circuit is open
 
EOP sensor is damaged or has failed
 
Instrument Cluster or PCM has failed
 

Trouble Code: P0523



Engine Oil Pressure Sensor Circuit High Input

Possible Causes:



EOP sensor signal circuit is shorted to VREF or system power
 
EOP sensor ground circuit is open
 
EOP sensor is damaged or has failed
 
Instrument Cluster or PCM has failed
 

Trouble Code: P0530



A/C Refrigerant Pressure Sensor Circuit Malfunction

Possible Causes:



ACP sensor signal circuit is open or shorted to ground
 
ACP sensor signal circuit is shorted to VREF or system power
 
ACP sensor ground circuit is open
 
ACP sensor is damaged or has failed
 
PCM has failed
 

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: 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/Coast Switch Circuit Malfunction

Possible Causes:



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

Trouble Code: P0571



Cruise Control Brake Switch Circuit Malfunction

Possible Causes:



Cruise brake switch signal circuit is shorted to ground
 
Cruise brake switch B+ circuit is open (test MINI Relay & 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: 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: P0645



Air Conditioning Clutch Relay Control Circuit Malfunction

Possible Causes:



A/C relay control circuit is open, shorted to ground or to power
 
A/C relay power circuit is open (test the A/C CRUISE mini fuse)
 
A/C relay is damaged or has failed
 
PCM has failed
 

Trouble Code: P0650



Malfunction Indicator Lamp Circuit Malfunction

Possible Causes:



MIL control circuit is open, shorted to ground or shorted to system power
 
MIL control power circuit is open in the Instrument Cluster
 
MIL (the lamp) is damaged or has failed
 
Instrument Cluster or the PCM has failed
 

Trouble Code: P0654



Engine Speed Output Control Circuit Malfunction

Possible Causes:



Engine speed circuit is open or shorted to ground
 
Engine speed is shorted to system power
 
Instrument Cluster has failed
 
PCM has failed
 

Trouble Code: P0704



Clutch Switch Circuit Malfunction (M49/MM6)

Possible Causes:



Clutch switch circuit is open, shorted to ground or to power
 
Clutch switch power circuit is open (test the ENG IGN fuse)
 
Clutch switch is out of adjustment, damaged or has failed
 
PCM has failed
 

Trouble Code: P0801



Reverse Inhibit Solenoid Circuit Malfunction (MM6)

Possible Causes:



Reverse inhibit solenoid circuit is open, shorted to ground or shorted to system power
 
Reverse inhibit solenoid B+ circuit open (test ENG SENS fuse)
 
Reverse inhibit solenoid is damaged or has failed
 
PCM has failed
 

Trouble Code: P0803



Skip Shift Solenoid Circuit Malfunction (MM6)

Possible Causes:



Skip shift solenoid circuit is open, shorted to ground or shorted to system power
 
Skip shift solenoid B+ circuit open (test ENG SENS fuse)
 
Skip shift solenoid is damaged or has failed
 
PCM has failed
 

Trouble Code: P0804



Skip Shift Lamp Control Circuit Malfunction (MM6)

Possible Causes:



Skip shift lamp control (Class 2) circuit is open, shorted to ground or to system power
 
Skip shift lamp power circuit is open (test Instrument Cluster)
 
Skip shift lamp has failed (in the Instrument Cluster)
 
PCM has failed
 

Trouble Code: P1111



IAT Sensor Circuit Intermittent High Input

Possible Causes:



IAT sensor signal circuit is open (intermittent fault)
 
IAT sensor ground circuit is open (intermittent fault)
 
IAT sensor is damaged (an intermittent "open" condition)
 
PCM has failed
 

Trouble Code: P1112



IAT Sensor Circuit Intermittent Low Input

Possible Causes:



IAT sensor signal circuit is shorted to ground (intermittent fault)
 
IAT sensor is damaged (an intermittent "shorted" condition)
 
PCM has failed
 

Trouble Code: P1114



ECT Sensor Circuit Intermittent Low Input

Possible Causes:



ECT sensor signal circuit shorted to ground (intermittent fault)
 
ECT sensor has failed (possible intermittent shorted condition)
 
PCM has failed
 

Trouble Code: P1115



ECT Sensor Circuit Intermittent High Input

Possible Causes:



ECT sensor signal circuit is open between the sensor and PCM
 
ECT sensor ground circuit is open between sensor and PCM
 
ECT sensor has failed (possible intermittent "open" condition)
 
PCM has failed
 

Trouble Code: P1120



TP Sensor 1 Circuit Malfunction

Possible Causes:



TP1 sensor signal circuit is open, shorted to ground or to power
 
TP1 sensor low reference circuit has high resistance condition
 
TP1 sensor is damaged or has failed
 

Trouble Code: P1125



TP Sensor 1 Circuit 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 within the TAC system, it may set more than one code. This is due to the redundant tests run continuously on this system. Locating and repairing a single fault may correct more than one code. Keep this in mind as you review the Captured Info available with a Scan Tool.
 
Refer to the related TAC system trouble codes
 

Trouble Code: P1133



HO2S-11 (Bank 1 Sensor 1) Insufficient Switching

Possible Causes:



Air leaks present in the exhaust manifold or the exhaust pipes
 
Fuel pressure is too high (i.e., causing a rich air fuel mixture)
 
HO2S may be contaminated (due to improper fuel or silicone)
 
HO2S signal high or low reference circuit has high resistance
 
HO2S heater element has failed, or the heater circuit is open
 
PCM has failed
 

Trouble Code: P1134



HO2S-11 (Bank 1 Sensor 1) Transition Time Ratio

Possible Causes:



Air leaks present in the exhaust manifold or the exhaust pipes
 
HO2S may be contaminated (due to improper fuel or silicone)
 
HO2S signal low reference circuit has high resistance
 
HO2S heater element has failed, or the heater circuit is open
 
PCM has failed
 

Trouble Code: P1153



HO2S-21 (Bank 2 Sensor 1) Insufficient Switching

Possible Causes:



Air leaks present in the exhaust manifold or the exhaust pipes
 
Fuel pressure is too high (i.e., causing a rich air fuel mixture)
 
HO2S may be contaminated (due to improper fuel or silicone)
 
HO2S signal high or low reference circuit has high resistance
 
HO2S heater element has failed, or the heater circuit is open
 
PCM has failed
 

Trouble Code: P1154



HO2S-21 (Bank 2 Sensor 1) Transition Time Ratio

Possible Causes:



Air leaks present in the exhaust manifold or the exhaust pipes
 
HO2S may be contaminated (due to improper fuel or silicone)
 
HO2S signal low reference circuit has high resistance
 
HO2S heater element has failed, or the heater circuit is open
 
PCM has failed
 

Trouble Code: P1187



Engine Oil Temperature Sensor Low Input

Possible Causes:



EOT sensor signal circuit is shorted to ground
 
EOT sensor is damaged or it has failed (possible short circuit)
 
PCM has failed
 

Trouble Code: P1188



Engine Oil Pressure Sensor High Input

Possible Causes:



EOP sensor signal circuit is open, or the EOP sensor ground circuit is open
 
EOP sensor is damaged or it has failed (possible open circuit)
 
PCM has failed
 

Trouble Code: P1220



TP Sensor 2 Circuit Malfunction

Possible Causes:



TP2 sensor signal circuit is open, shorted to ground or to power
 
TP2 sensor VREF circuit is open or shorted to ground
 
TP2 sensor VREF circuit is shorted to system power (B+)
 
TP2 sensor ground circuit has a high resistance condition
 
TP2 sensor is damaged or has failed
 

 
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