Cobalt 2006-2008, G5 2007

2.2L L4 VIN F Std 10

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Trouble Code: P2096



Post Catalyst Fuel Trim System Low Limit

Possible Causes:



Malfunctioning fuel injectors
 
Low fuel system pressure
 
Fuel that is contaminated
 
Missing, loose, or leaking exhaust components from the HO2S forward
 
Vacuum leaks
 
Ethanol concentration greater than 15 percent
 
Incorrect PCV system operation
 

Trouble Code: P2100



Throttle Actuator Control (TAC) Motor Control Circuit

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 malfuntion
 
ECM has failed
 

Trouble Code: P2101



Throttle Actuator Position Performance

Possible Causes:



A low voltage condition may set this DTC, reviewing the Freeze Frame/Failure Records may be beneficial in diagnosing this concern.
 
This test procedure requires that the vehicle battery has passed a load test and is completely charged. Refer to Battery Inspection/Test .
 
A powertrain relay that is slow to switch ON may set this DTC. Inspect the relay thoroughly.
 
The throttle valve is spring loaded to a slightly open position. This is referred to as the rest position.
 
The throttle valve should not be completely closed nor should they be open any more than the specified amount.
 
The throttle valve should move open and to the closed position without binding under the normal spring pressure.
 
The throttle should NOT be free to move open or closed WITHOUT spring pressure.
 
Replace the throttle body if any of these conditions are found.
 



The scan tool has the ability to operate the throttle control system using Special Functions. Actuate the throttle valve using the throttle blade control function located in the Throttle Actuator Control (TAC) System menu. This function will operate the throttle valve through the entire range in order to determine if the throttle body and system operate correctly.
 
Inspect for the following conditions:

Use the J 35616 Connector Test Adapter Kit for any test that requires probing the ECM harness connector or a component harness connector.
 
Poor connections at the ECM or at the component--Inspect the harness connectors for a poor terminal to wire connection. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems for the proper procedure.
 
For an intermittent condition, refer to Intermittent Conditions .
 

 

Trouble Code: P2101



Throttle Actuator Position Performance

Trouble Code: P2101



Control Module Throttle Actuator Position 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 malfuntion
 
ECM has failed
 

Trouble Code: P2101



Throttle Closed Position 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 malfuntion
 
ECM has failed
 

Trouble Code: P2108



Throttle Actuator Control (TAC) Module 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 malfuntion
 
ECM has failed
 

Trouble Code: P2119



Throttle Closed Position Performance

Possible Causes:



Inspect for mechanical conditions or binding that may be temperature related. Components may not move freely in extreme heat or cold due to the presence of contaminants or ice formation.
 

Trouble Code: P2119



Throttle Closed Position Performance

Trouble Code: P2119



Throttle Closed Position 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 malfuntion
 
ECM has failed
 

Trouble Code: P2120



Accelerator Pedal Position (APP) Sensor 1 Circuit

Trouble Code: P2120



Accelerator Pedal Position Sensor 1 Signal Performance

Possible Causes:



APP sensor connector is damaged, open or shorted
 
APP1 sensor signal circuit is open or shorted to ground
 
APP1 sensor signal circuit is shorted to APP sensor 2 circuit
 
APP1 sensor signal circuit is open or shorted to VREF (5v)
 
APP sensor is damaged or it has failed
 
TAC module is damaged or it has failed
 

Trouble Code: P2122



Accelerator Pedal Position (APP) Sensor 1 Circuit Low Voltage

Trouble Code: P2122



Accelerator Pedal Position (APP) Sensor 1 Circuit Low Voltage

Possible Causes:



Low reference circuit of the APP sensor for a short to voltage, or an open/high resistance.
 
5-volt reference circuit for a short to ground or open/high resistance.
 
Faulty APP Sensor
 
ECM has failed
 

Trouble Code: P2123



Accelerator Pedal Position (APP) Sensor 1 Circuit High Voltage

Trouble Code: P2123



Accelerator Pedal Position (APP) Sensor 1 Circuit High Voltage

Possible Causes:



Low reference circuit of the APP sensor for a short to voltage, or an open/high resistance.
 
5-volt reference circuit for a short to ground or open/high resistance.
 
Faulty APP Sensor
 
ECM has failed
 

Trouble Code: P2125



Accelerator Pedal Position (APP) Sensor 2 Circuit

Trouble Code: P2125



Accelerator Pedal Position (APP) Sensor 2 Circuit Low Voltage

Possible Causes:



Low reference circuit of the APP sensor for a short to voltage, or an open/high resistance.
 
5-volt reference circuit for a short to ground or open/high resistance.
 
Faulty APP Sensor
 
ECM has failed
 

Trouble Code: P2127



Accelerator Pedal Position (APP) Sensor 2 Circuit Low Voltage

Trouble Code: P2127



Accelerator Pedal Position (APP) Sensor 2 Circuit Low Voltage

Possible Causes:



Low reference circuit of the APP sensor for a short to voltage, or an open/high resistance.
 
5-volt reference circuit for a short to ground or open/high resistance.
 
Faulty APP Sensor
 
ECM has failed
 

Trouble Code: P2128



Accelerator Pedal Position (APP) Sensor 2 Circuit High Voltage

Trouble Code: P2128



Accelerator Pedal Position (APP) Sensor 2 Circuit High Voltage

Possible Causes:



Low reference circuit of the APP sensor for a short to voltage, or an open/high resistance.
 
5-volt reference circuit for a short to ground or open/high resistance.
 
Faulty APP Sensor
 
ECM has failed
 

Trouble Code: P2129



Barometric Pressure (BARO) Sensor Circuit High Voltage

Possible Causes:



Moisture in the vent inlet
 
Debris in the vent inlet
 

Trouble Code: P2135



Throttle Position (TP) Sensor 1-2 Correlation

Possible Causes:



If the DTC is determined to be intermittent, refer to Intermittent Conditions .
 

Trouble Code: P2135



Throttle Position (TP) Sensor 1-2 Correlation

Trouble Code: P2135



Throttle Position Sensor 1-2 Correlation Error

Possible Causes:



TP1 sensor signal circuit shorted to TP sensor signal 2 circuit
 
TP1 sensor signal circuit is shorted to the low reference circuit
 
TP2 sensor signal circuit is shorted to the low reference circuit
 
Throttle body assembly is damaged or it has failed
 

Trouble Code: P2138



Accelerator Pedal Position (APP) Sensor 1-2 Correlation

Possible Causes:



The ECM compares the signal of each of the APP sensor to each other throughout the entire range of operation. Clear the DTCs and actuate the pedal through the entire range with the ignition ON and the engine OFF.
 
Use the J 35616 Connector Test Adapter Kit for any test that requires probing the ECM harness connector or a component harness connector. Using this kit will prevent damage to the harness connector terminals.
 
For intermittent conditions, refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P2138



Accelerator Pedal Position (APP) Sensor 1-2 Correlation

Trouble Code: P2138



Accelerator Pedal Position (APP) Sensor 1-2 Correlation

Possible Causes:



Low reference circuit of the APP sensor for a short to voltage, or an open/high resistance.
 
5-volt reference circuit for a short to ground or open/high resistance.
 
Faulty APP Sensor
 
ECM has failed
 

Trouble Code: P2176



Minimum Throttle Position Not Learned

Possible Causes:



The throttle valve is spring loaded to a slightly open position. This is referred to as the rest position.
 
The throttle valve should not be completely closed nor should they be open any more than the specified amount.
 
The throttle valve should move open and to the closed position without binding under the normal spring pressure.
 
The throttle should NOT be free to move open or closed WITHOUT spring pressure.
 
Replace the throttle body if any of these conditions are found.
 



The scan tool has the ability to operate the throttle control system using Special Functions. Actuate the throttle valve using the throttle blade control function located in the TAC System menu. This function will operate the throttle valve through the entire range in order to determine if the throttle body and system operate correctly.
 
Inspect for the following conditions:

Use the J 35616 Connector Test Adapter Kit for any test that requires probing the ECM harness connector or a component harness connector.
 
Poor connections at the ECM or at the component--Inspect the harness connectors for a poor terminal to wire connection. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems for the proper procedure.
 
For an intermittent condition, refer to Intermittent Conditions .
 

 

Trouble Code: P2176



Minimum throttle Position Not Learned

Trouble Code: P2176



Minimum Throttle Position Not Learned

Possible Causes:



Perform the throttle learn procedure
 
Throttle body has failed.
 

Trouble Code: P2227



Barometric Pressure (BARO) Sensor Performance

Trouble Code: P2227



Barometric Pressure (BARO) Sensor Performance

Possible Causes:



Vacuum leaks
 
BARO sensor low reference circuit for an open/high resistance
 
BARO sensor 5V reference circuit for an open/high resistance or a short to ground
 
BARO sensor 5V reference circuit for a short to voltage
 
BARO sensor signal circuit terminal 3 for a short to voltage
 
BARO sensor signal circuit for an open/high resistance or a short to ground
 
BARO sensor has failed
 

Trouble Code: P2228



Barometric Pressure (BARO) Sensor Circuit Low Voltage

Trouble Code: P2228



Barometric Pressure (BARO) Sensor Circuit Low Voltage

Possible Causes:



Vacuum leaks
 
BARO sensor low reference circuit for an open/high resistance
 
BARO sensor 5V reference circuit for an open/high resistance or a short to ground
 
BARO sensor 5V reference circuit for a short to voltage
 
BARO sensor signal circuit terminal 3 for a short to voltage
 
BARO sensor signal circuit for an open/high resistance or a short to ground
 
BARO sensor has failed
 

Trouble Code: P2229



Barometric Pressure (BARO) Sensor Circuit High Voltage

Trouble Code: P2229



Barometric Pressure (BARO) Sensor Circuit High Voltage

Possible Causes:



Vacuum leaks
 
BARO sensor low reference circuit for an open/high resistance
 
BARO sensor 5V reference circuit for an open/high resistance or a short to ground
 
BARO sensor 5V reference circuit for a short to voltage
 
BARO sensor signal circuit terminal 3 for a short to voltage
 
BARO sensor signal circuit for an open/high resistance or a short to ground
 
BARO sensor has failed
 

Trouble Code: P2261



Supercharger Bypass Valve Stuck

Trouble Code: P2270



HO2S Signal Stuck Lean Sensor 2

Possible Causes:



HO2S signal circuit open/high resistance
 
HO2S signal circuit short to voltage
 
HO2S signal circuit open/high resistance
 
HO2S is damaged
 
ECM has failed
 

 
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