Cobalt 2006-2008, G5 2007

2.2L L4 VIN F Std 7

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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

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

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
 

Trouble Code: P0662



Engine Controls Ignition Relay Control Circuit

Possible Causes:



Powertrain relay shorted to ground on the control circuit
 
Powertrain relay shorted to voltage or an open/high resistance
 
Powertrain relay has failed
 
ECM has failed
 

Trouble Code: P0685



Engine Controls Ignition Relay Control Circuit

Possible Causes:



This test procedure assumes that the vehicle battery has passed a load test and is completely charged. Refer to Battery Inspection/Test .
 
When disconnecting electrical connectors or removing fuses and relays from a fuse block, always inspect the component electrical terminals for corrosion and the mating electrical terminals for correct tension.
 

Trouble Code: P0686



Engine Controls Ignition Relay Control Circuit High Voltage

Possible Causes:



Powertrain relay shorted to ground on the control circuit
 
Powertrain relay shorted to voltage or an open/high resistance
 
Powertrain relay has failed
 
ECM has failed
 

Trouble Code: P0687



Engine Controls Relay Feedback Circuit Low Voltage

Possible Causes:



Powertrain relay shorted to ground on the control circuit
 
Powertrain relay shorted to voltage or an open/high resistance
 
Powertrain relay has failed
 
ECM has failed
 

Trouble Code: P0689



Engine Controls Ignition Relay Feedback Circuit Low Voltage

Possible Causes:



This test procedure assumes that the vehicle battery has passed a load test and is completely charged. Refer to Battery Inspection/Test .
 
When disconnecting electrical connectors or removing fuses and relays from a fuse block, always inspect the component electrical terminals for corrosion and the mating electrical terminals for correct tension.
 

Trouble Code: P0689



Engine Controls Ignition Relay De-energized Too Late

Possible Causes:



Powertrain relay shorted to ground on the control circuit
 
Powertrain relay shorted to voltage or an open/high resistance
 
Powertrain relay has failed
 
ECM has failed
 

Trouble Code: P068B



Engine Controls Relay Feedback Circuit High Voltage

Possible Causes:



Powertrain relay shorted to ground on the control circuit
 
Powertrain relay shorted to voltage or an open/high resistance
 
Powertrain relay has failed
 
ECM has failed
 

Trouble Code: P0690



Engine Controls Ignition Relay Feedback Circuit High Voltage

Possible Causes:



This test procedure assumes that the vehicle battery has passed a load test and is completely charged. Refer to Battery Inspection/Test .
 
When disconnecting electrical connectors or removing fuses and relays from a fuse block, always inspect the component electrical terminals for corrosion and the mating electrical terminals for correct tension.
 

Trouble Code: P06A6



Transmission Control Module (TCM) Requested MIL Illumination

Possible Causes:



MIL control circuit is shorted to ground
 
Check the TCM for any trouble codes in memory that are responsible for the request to turn on the MIL
 
TCM has failed
 

Trouble Code: P0700



Transmission Control Module (TCM) Requested MIL Illumination

Trouble Code: P0700



Transmission Control Module (TCM) Requested MIL Illumination

Possible Causes:



DTC P0700 can not be cleared from the ECM until the related TCM codes have been cleared.
 

Trouble Code: P0700



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
 
ECM has failed
 

Trouble Code: P0705



Transmission Range (TR) Switch Circuit

Trouble Code: P0711



Transmission Fluid Temperature (TFT) Sensor Performance

Trouble Code: P0712



Transmission Fluid Temperature (TFT) Sensor Circuit Low Voltage

Trouble Code: P0713



Transmission Fluid Temperature (TFT) Sensor Circuit High Voltage

Trouble Code: P0716



Input Speed Sensor Performance

Possible Causes:



Ensure the wiring harness is not stretched too tightly or other components are pressing on the connector body. Also, inspect for proper clearance to any other components and wiring. Refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0717



Input Speed Sensor Circuit Low Voltage

Possible Causes:



Ensure the wiring harness is not stretched too tightly or other components are pressing on the connector body. Also, inspect for proper clearance to any other components and wiring. Refer to Testing for Intermittent Conditions and Poor Connections .
 

 
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