Cobalt 2006-2008, G5 2007

2.4L L4 VIN B Std 6

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Trouble Code: P0575



Cruise Control Switch Signal Circuit

Possible Causes:



This DTC may be stored as a history DTC without affecting the operation of the BCM. If stored only as a history DTC and not retrieved as a current DTC, do not replace the BCM or ECM.
 
If this DTC is retrieved as both a current and history DTC, replace the BCM.
 
Using the Failure Records data may help locate an intermittent condition. If you cannot duplicate the DTC, the information in the Failure Records can help determine how many miles since the DTC set. The Fail Counter and Pass Counter can help determine how many ignition cycles that the diagnostic test reported a pass and/or a fail.
 

Trouble Code: P0601



Control Module Read Only Memory (ROM)

Trouble Code: P0601



Control Module Torque Performance

Possible Causes:



Voltage and ground inputs to the ECM
 
High resistance, short or open condition to the ECM
 
ECM is not properly programmed
 
ECM has failed
 

Trouble Code: P0601A



Control Module Torque Calculation Performance

Possible Causes:



Voltage and ground inputs to the ECM
 
High resistance, short or open condition to the ECM
 
ECM is not properly programmed
 
ECM has failed
 

Trouble Code: P0601B



Control Module Engine Speed Performance

Possible Causes:



Voltage and ground inputs to the ECM
 
High resistance, short or open condition to the ECM
 
ECM is not properly programmed
 
ECM has failed
 

Trouble Code: P0601C



Control Module Not Programmed

Possible Causes:



Check the voltage and ground inputs to the ECM for a, short, open or high resistance
 
ECM has failed
 

Trouble Code: P0602



Control Module Not Programmed

Trouble Code: P0602



Control Module Long Term Memory Reset

Possible Causes:



Check the voltage and ground inputs to the ECM for a, short, open or high resistance
 
ECM has failed
 

Trouble Code: P0603



Control Module Long Term Memory Reset

Trouble Code: P0603



Control Module Random Access Memory (RAM)

Possible Causes:



Check the voltage and ground inputs to the ECM for a, short, open or high resistance
 
ECM has failed
 

Trouble Code: P0604



Control Module Random Access Memory (RAM)

Trouble Code: P0604



Control Module Programming Read Only Memory (ROM)

Possible Causes:



The ECM must be replaced to correct this problem. A new ECM must be programmed with the correct software/calibration.
 

Trouble Code: P0605



Control Module Programming Read Only Memory

Trouble Code: P0606



Control Module Internal Performance

Trouble Code: P0606



Control Module Performance

Possible Causes:



Check the voltage and ground inputs to the ECM for a, short, open or high resistance
 
ECM has failed
 

Trouble Code: P0607



Control Module Performance

Trouble Code: P0607



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)
 
ECM has failed
 

Trouble Code: P060D



Control Module Accelerator Pedal Position (APP) System Performance

Trouble Code: P060D



Control Module Vehicle Options Incorrect

Possible Causes:



ECM is not properly programmed
 
ECM has failed
 

Trouble Code: P060E



Control Module Throttle Position (TP) System Performance

Trouble Code: P0610



Generator Signal Range/Performance

Possible Causes:



Generator 'L' terminal circuit is open, shorted to ground or B+
 
Generator 'F' terminal circuit is open, shorted to ground or B+
 
ECM has failed
 

Trouble Code: P0615



Starter Relay Control Circuit

Possible Causes:



Ignition system DTCs set with the ignition switch in the START position if the CRNK relay or the starter is inoperative. When the ECM/PCM enables starter operation, the ECM/PCM also initiates the diagnostic test routines for DTCs P0335, P0340, and P0385. If a condition exists which prevents the engine from cranking, the ECM/PCM will not receive signal input from the CKP and CMP sensors, and the DTCs will set. Reviewing the Fail Records vehicle mileage since the diagnostic test last failed may assist in diagnosing the condition. The information may help determine how often the condition that set the DTC occurs.
 

Trouble Code: P0621



Generator L-Terminal Circuit

Trouble Code: P0622



Generator F-Terminal Circuit

Trouble Code: P0622



Generator F-Terminal Circuit

Possible Causes:



On vehicles equipped with a sense circuit connected to the voltage regulator. This circuit must have voltage for the charging system to operate properly. This circuit is used as a reference to control system voltage. All circuits must be tested at the generator before replacing any components. refer to system schematic to confirm if the vehicle being serviced uses the sense circuit as part of the charging system.
 

Trouble Code: P0628



Fuel Pump Enable Circuit High Voltage

Possible Causes:



Short to voltage on the enable circuit
 
Fuel Pump Control Module (FECM)
 
ECM has failed
 

Trouble Code: P0629



Control Module Fuel Injector Control Performance

Possible Causes:



Module not properly programmed
 
ECM has failed
 

Trouble Code: P062F



Control Module Long Term Memory Performance

Trouble Code: P062F



Throttle Actuator Control (TAC) Command Performance

Possible Causes:



Throttle blade that is not in the rest position
 
Throttle valve that is binding open or closed
 
Throttle valve that opens or closes without spring pressure
 
Throttle body has failed
 
ECM has failed
 

Trouble Code: P0641



5-Volt Reference 1 Circuit

Possible Causes:



It may be possible to locate the fault by disconnecting one component at a time from the 5-volt reference circuit while viewing the 5-Volt Reference circuit parameter on the scan tool. The scan tool parameter would change from Fault to OK when the source of the fault is disconnected. If all 5-volt reference components have been disconnected and a Fault is still indicated, the fault may exist in the wiring harness.
 

Trouble Code: P0642



5-Volt Reference 1 Circuit High Voltage

Possible Causes:



5v VREF circuit is shorted to chassis or sensor ground
 
5v VREF circuit to FTP. CMP IMTV or TP sensor circuit is shorted to (B+)
 
Component failure
 
ECM has failed
 

Trouble Code: P0643



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
 
ECM has failed
 

Trouble Code: P0645



Air Conditioning (A/C) Clutch Relay Control Circuit.

Possible Causes:



Important: Be sure to verify that the ECM or PCM engine grounds are secure and clean. If DTC P0645 cannot be duplicated, reviewing the Failure Records vehicle millage since the diagnostic test last failed may help determine how often the condition that caused the DTC to set occurs. This may assist in diagnosing the condition. If the condition is not present, refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0650



Malfunction Indicator Lamp (MIL) Control Circuit

Trouble Code: P0650



5-Volt Reference 2 Circuit

Possible Causes:



5v VREF circuit is shorted to chassis or sensor ground
 
5v VREF circuit to APP. CKP, and CMP brake booster vacuum sensor circuit is shorted to (B+)
 
ECM has failed
 

Trouble Code: P0651



5-Volt Reference 2 Circuit

Possible Causes:



It may be possible to locate the fault by disconnecting one component at a time from the 5-volt reference circuit while viewing the 5-Volt Reference circuit parameter on the scan tool. The scan tool parameter would change from Fault to OK when the source of the fault is disconnected. If all 5-volt reference components have been disconnected and a Fault is still indicated, the fault may exist in the wiring harness.
 

Trouble Code: P0652



5-Volt Reference 2 Circuit High Voltage

Possible Causes:



5v VREF circuit is shorted to chassis or sensor ground
 
5v VREF circuit to APP TP or CKP sensor circuit is shorted to (B+)
 
Component failure
 
ECM has failed
 

Trouble Code: P0653



Intake Manifold Tuning (IMT) Valve Performance.

Possible Causes:



IMT low reference circuit for an open/high resistance
 
IMT 5-volt reference circuit for a short to ground or an open/high resistance
 
IMT 5-volt reference circuit for a short to voltage
 
IMT signal circuit for an open/high resistance
 
IMT signal circuit for a short to ground or an open/high resistance
 
IMT signal circuit for a short to voltage
 
IMT has failed
 
ECM has failed
 

Trouble Code: P065E



Intake Manifold Tuning (IMT) Valve Solenoid Control Circuit Low Voltage.

Possible Causes:



IMT ignition circuit for a short to ground or an open/high resistance.
 
IMT control circuit for a short to ground
 
IMT control circuit for a short to voltage or an open/high resistance
 
IMT component failure
 
ECM has failed
 

Trouble Code: P0661



Intake Manifold Tuning (IMT) Valve Solenoid Control Circuit High Voltage.

Possible Causes:



IMT ignition circuit for a short to ground or an open/high resistance.
 
IMT control circuit for a short to ground
 
IMT control circuit for a short to voltage or an open/high resistance
 
IMT component failure
 
ECM has failed
 

 
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