Cavalier, Sunfire 2001-2005

2.4L L4 VIN T Auto 2

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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: 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: 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
 

Trouble Code: P1632



Theft Deterrent Fuel Disable Signal Received

Possible Causes:



Perform the Powertrain Onboard Diagnostic System Check
 
Password Learn Procedure - Attempt to start the vehicle (leave the ignition "on"). The Theft System telltale will flash for 4 seconds and then remain "on" for 10 minutes. Theft System Learn Mode will display Disabled on the Scan Tool
 
Turn the ignition "off" after the Theft System telltale goes "out".
 
Repeat steps 1 and 2 two more times. After the Theft System telltale turns "off" on the 3rd key cycle, and Theft System Learn Mode will display Enabled on the Scan Tool, attempt to start the engine. Once the engine starts the password is learned.
 

Trouble Code: P1810



TFP Valve Position Switch Malfunction (4T40-E/4T45-E)

Possible Causes:



Inspect the transmission linkage from the gear select lever to the manual valve for proper adjustment
 
TFP valve position switch signal circuit is open or grounded
 
TFP valve position switch circuit shorted to another signal
 
TFP valve position switch is damaged or has failed
 
PCM has failed
 

Trouble Code: P1811



Maximum Adaptive and Long Term Shift (4T40/4T45-E)

Possible Causes:



Ask customer about overloading vehicle, exceeding trailer-towing limit, or towing in O/D
 
ATF level is low, or the fluid is contaminated or burnt
 
Low fluid level caused by external leaks
 
Out-of-position fluid filter or clogged fluid filter, or Internal fluid passage leaks
 
Casting porosity or damage, or damaged gasket or spacer plate
 
Out-of-position gasket or spacer plate
 
Pressure control solenoid is contaminated, stuck or damaged
 
Leaking or stuck pressure regulator valve train
 
Stuck torque signal valve train, or leaking torque signal valve train
 
Damaged or leaking oil pump or inadequate oil pump suction
 
Oil pump cavitation
 

Trouble Code: P1860



TCC PWM Solenoid Electrical (4T40/4T45-E)

Possible Causes:



TCC solenoid control circuit is open, shorted to ground or shorted to system power (B+)
 
TCC solenoid power circuit is open (check the TRANS fuse)
 
TCC solenoid is damaged or has failed
 
PCM has failed
 
TSB 02-07-30-022A contains a repair procedure for this code
 

Trouble Code: P1870



Transaxle Component Slipping (3T40)

Possible Causes:



Check the ATF level and condition (look for burnt fluid)
 
Transmission may have internal damage (a mechanical fault)
 

Trouble Code: P1887



TCC Release Switch Circuit Malfunction (4T40/4T45-E)

Possible Causes:



TCC release switch signal circuit is open or the PCM has failed
 
Turbine shaft O-ring seal leaks, oil seal rings missing/damaged.
 
TCC control valve damaged or No. 1 check ball is damaged
 
Spacer plate release exhaust blocked with debris
 
Case cover or spacer plate gaskets improperly installed
 
TSB 02-07-30-022A contains a repair procedure for this code
 

Trouble Code: U1000



Class 2 Communication Malfunction

Possible Causes:



Class 2 circuit is open, shorted to ground or shorted to power
 
PCM ignition power circuit(s) has a high resistance condition
 
PCM main ground circuit(s) has a high resistance condition
 
SDM (module) could be shorted pulling the voltage low
 

Trouble Code: U1016



No Communication With Powertrain Control Module

Possible Causes:



PCM Class 2 circuit is open, shorted to ground or to B+
 
PCM ignition power circuit(s) has a high resistance condition
 
PCM main ground circuit(s) has a high resistance condition
 
PCM (module) may have failed and is pulling the circuit low
 

Trouble Code: U1048



No Communication With Rear Wheel Steering Control Module

Possible Causes:



RWSCM Class 2 circuit is open, shorted to ground or to B+
 
RWSCM ignition power circuit has a high resistance condition
 
RESCM main ground circuit(s) has a high resistance condition
 
RESCM (module) may have failed and is pulling the circuit low
 

Trouble Code: U1064



No Communication With Body Control Module

Possible Causes:



BCM Class 2 circuit is open, shorted to ground or to B+
 
BCM ignition power circuit has a high resistance condition
 
BCM main ground circuit(s) has a high resistance condition
 
BCM (module) may have failed and is pulling the circuit low
 

Trouble Code: U1088



No Communication With SDM (Restraint Module)

Possible Causes:



SDM Class 2 circuit is open, shorted to ground or to B+
 
SDM ignition power circuit has a high resistance condition
 
SDM main ground circuit(s) has a high resistance condition
 
SDM (module) may have failed and is pulling the circuit low
 

Trouble Code: U1096



No Communication With Instrument Panel Cluster

Possible Causes:



IPC Class 2 circuit is open, shorted to ground or to B+
 
IPC ignition power circuit has a high resistance condition
 
IPC main ground circuit(s) has a high resistance condition
 
IPC (module) may have failed and is pulling the circuit low
 

Trouble Code: U1097



No Communication With Driver Information Center

Possible Causes:



DIC Class 2 circuit is open, shorted to ground or to B+
 
DIC ignition power circuit has a high resistance condition
 
DIC main ground circuit(s) has a high resistance condition
 
DIC (module) may have failed and is pulling the circuit low
 

Trouble Code: U1151



No Communication With Vehicle Interface Unit

Possible Causes:



VIU Class 2 circuit is open, shorted to ground or to B+
 
VIU ignition power circuit has a high resistance condition
 
VIU main ground circuit(s) has a high resistance condition
 
VIU (module) may have failed and is pulling the circuit low
 

 
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