Cavalier, Sunfire 2001-2005

2.2L L4 VIN 4 Auto 2

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Trouble Code: P0453



Fuel Tank Pressure Sensor Circuit High Input

Possible Causes:



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

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: P0502



Vehicle Speed Sensor Low Input (4T40-E, 4T45-E, 4L60-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
 

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)
 
Idle air inlet passage or throttle bore is dirty or full of deposits
 
IAC solenoid control circuit has a high resistance condition
 
IAC valve is damaged or has failed
 
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: 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 be overcharging)
 
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: 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: P0711



TFT Sensor Range/Performance (4T40-E/4T45-E)

Possible Causes:



ATF fluid level too low or the fluid is contaminated or burnt
 
TFT sensor is contaminated, damaged or "skewed"
 
PCM has failed
 

Trouble Code: P0712



TFT Sensor Circuit Low Input (4T40-E/4T45-E)

Possible Causes:



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

Trouble Code: P0713



TFT Sensor Circuit High Input (4T40-E/4T45-E)

Possible Causes:



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

Trouble Code: P0716



A/T Input Speed Sensor Circuit Malfunction (4T40/4T45-E)

Possible Causes:



ISS positive (+) circuit is open, shorted to ground or to power
 
ISS negative (-) circuit is open, shorted to ground or to power
 
ISS is damaged or has failed
 
PCM has failed
 
TSB 02-07-30-022A contains a repair procedure for this code
 

Trouble Code: P0717



A/T Input Shaft Speed Sensor Low Input (4T40/4T45-E)

Possible Causes:



ISS positive (+) circuit is open, shorted to ground or to power
 
ISS negative (-) circuit is open, shorted to ground or to power
 
ISS is damaged or has failed
 
PCM has failed
 
TSB 02-07-30-022A contains a repair procedure for this code
 

Trouble Code: P0719



TCC Brake Switch Circuit Low Input (3T40, 4T40/4T45-E)

Possible Causes:



TCC brake switch circuit is open or shorted to ground
 
TCC brake switch power circuit is open (test ABS or ERL fuse)
 
TCC brake switch is out of adjustment or damaged
 
PCM has failed
 

Trouble Code: P0724



Brake Switch Circuit High Input (3T40, 4T40-E, 4T45-E)

Possible Causes:



Check for ABS trouble codes (they can cause this code to set)
 
TCC brake switch circuit is shorted to system power
 
TCC brake switch is out of adjustment or damaged
 

Trouble Code: P0741



TCC System Mechanically Stuck Off (4T40, 4T45-E)

Possible Causes:



ATF level is too low, or the fluid is burnt or contaminated
 
Inspect transmission lines to radiator for bends or restrictions
 
Oil pressure screen is clogged or debris in the oil pan
 
TCC control valve is stuck "off" due to sediment or binding
 
TCC regulator valve is stuck "off" due to sediment or binding
 
TCC feed valve is stuck "off" due to sediment or binding
 
TCC solenoid valve O-ring or turbine shaft seals leaking or cut
 
TSB 02-07-30-021 contains a repair procedure for this code
 

Trouble Code: P0742



TCC System Stuck On - Mechanical (4T40-E, 4T45-E)

Possible Causes:



Transmission seal(s) leaking or damaged
 
TCC release switch contains debris or sediment
 
TCC release switch contacts are damaged or switch has failed
 
TCC release switch circuit is shorted to ground
 

Trouble Code: P0748



Pressure Control Solenoid Circuit Malfunction (4T40-E, 4T45-E)

Possible Causes:



PC solenoid high side circuit is open, shorted to ground or B+
 
PC solenoid low side circuit is open, shorted to ground or to B+
 
PC solenoid high or low side driver is damaged or has failed
 

Trouble Code: P0751



A/T 1-2 Shift Solenoid - No 1st or 4th Gear (4T40-E/4T45-E)

Possible Causes:



ATF is burnt or contaminated, or the level is incorrect
 
Transmission has an internal damage to the torque converter
 
Shift solenoid valve seals are damaged or leaking
 
Transmission has failed
 

Trouble Code: P0753



A/T 1-2 Shift Solenoid Circuit Malfunction (4T40-3/4T45-E)

Possible Causes:



1-2 shift solenoid control circuit is open or shorted to ground
 
1-2 shift solenoid control circuit is shorted to system power
 
1-2 shift solenoid is damaged or has failed
 
PCM has failed
 
TSB 02-07-30-022A contains a repair procedure for this code
 

Trouble Code: P0756



A/T 2-3 Shift Solenoid - No 2nd Or 3rd Gear (4T40-E/4T45-E)

Possible Causes:



ATF is burnt or contaminated
 
Transmission has plugged or restricted fluid circuits
 
Shift solenoid valve seals are leaking or damaged
 
Transmission has failed
 

Trouble Code: P0758



A/T 2-3 Shift Solenoid Circuit (4T40-E/4T45-E)

Possible Causes:



2-3 shift solenoid control circuit is open or shorted to ground
 
2-3 shift solenoid control circuit is shorted to system power
 
2-3 shift solenoid power circuit is open (check the ERLS fuse)
 
2-3 shift solenoid is damaged or has failed
 
PCM has failed
 
TSB 02-07-30-022A contains a repair procedure for this code
 

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: P1137



HO2S-12 Low Voltage During Power Enrichment

Possible Causes:



Air leaks present in exhaust manifold, exhaust pipes, or in the HO2S mounting location
 
HO2S may be contaminated (due to improper fuel or silicone)
 
PCM has failed
 

Trouble Code: P1171



Fuel System Lean During Acceleration

Possible Causes:



Fuel filter clogged or restricted
 
Fuel injectors dirty or restricted
 
Fuel level too low during heavy acceleration events
 
Fuel pressure regulator has failed (not supplying enough fuel)
 
Water or alcohol in fuel (low HO2S signal during acceleration)
 

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: P1202



Gas Mass Flow Sensor Low Frequency

Possible Causes:



GMS/MCV power circuit is open (test the CNG fuse underhood)
 
GMS/MCV power ground circuit is open or has high resistance
 
GMS/MCV motor power or ground circuit is open or grounded
 
MCV valve is damaged or has failed or the GMS has failed
 

Trouble Code: P1203



Gas Mass Flow Sensor High Frequency

Possible Causes:



Actual Gas Flow signal circuit routed near secondary ignition components or near high current components (motors, relays)
 
High power transceivers operating in or near the vehicle
 
GMS/MCV motor power or ground circuit has high resistance
 
MCV valve is damaged or has failed or the GMS has failed
 

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 it 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
 

Trouble Code: P1433



Fuel Pressure Sensor Circuit High Input

Possible Causes:



Fuel pressure sensor is sticking or it is damaged
 
Fuel pressure sensor signal circuit is open or shorted to VREF
 
Fuel pressure sensor is damaged or it has failed
 
PCM has failed
 

Trouble Code: P1441



EVAP System Flow During Non-Purge

Possible Causes:



An improperly installed or damaged EVAP canister purge valve
 
A temporary blockage in the EVAP canister purge valve, purge pipe, or EVAP canister could cause an intermittent condition
 
FTP sensor is out-of-calibration, damaged or "skewed"
 
Purge solenoid valve is damaged or has failed
 
PCM has failed
 
TSB 02-06-04-046 contains a repair procedure for this code
 

Trouble Code: P1621



Control Module Long Term Memory Performance

Possible Causes:



Perform the OBD System Check for Engine Controls
 
The PCM needs to be replaced
 

Trouble Code: P1630



Theft Deterrent Learn Mode Active

Possible Causes:



Refer to Programming the Theft Deterrent System
 
Perform the Powertrain Onboard Diagnostic System Check
 

Trouble Code: P1631



Theft Deterrent Fuel Enable Signal Not Correct

Possible Causes:



Refer to Diagnostic System Check for Body Control Systems
 
Perform the Powertrain Onboard Diagnostic System Check
 

 
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