Cobalt 2006-2008, G5 2007

2.2L L4 VIN F Std 8

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Trouble Code: P0719



Brake Switch Circuit Low Voltage

Possible Causes:



In order to avoid a misdiagnosis, inspect for proper adjustment of the cruise control release switch. Refer to Cruise Release Switch Adjustment . For an intermittent condition, refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
 

Trouble Code: P0719



Brake Switch Circuit Low Voltage

Trouble Code: P0719



Brake Switch Circuit Low Voltage

Possible Causes:



In order to avoid a misdiagnosis, inspect for proper adjustment of the cruise control release switch. Refer to Cruise Release Switch Adjustment . For an intermittent condition, refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0722



Output Speed Sensor Circuit Low Voltage

Trouble Code: P0723



Output Speed Sensor Circuit Intermittent

Trouble Code: P0724



Brake Switch Circuit High Voltage

Possible Causes:



In order to avoid a misdiagnosis, inspect for proper adjustment of the cruise control release switch. Refer to Cruise Release Switch Adjustment . For an intermittent condition, refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
 

Trouble Code: P0724



Brake Switch Circuit High Voltage

Trouble Code: P0724



Brake Switch Circuit High Voltage

Possible Causes:



In order to avoid a misdiagnosis, inspect for proper adjustment of the cruise control release switch. Refer to Cruise Release Switch Adjustment . For an intermittent condition, refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0741



Torque Converter Clutch (TCC) System - Stuck Off

Possible Causes:



Inspect the transmission fluid level.
 
The transmission may be in hot mode. Inspect the transmission fluid lines to the radiator. The lines may be pinched, plugged or twisted.
 

Trouble Code: P0741



Torque Converter Clutch (TCC) System - Stuck Off

Possible Causes:



Inspect the transmission fluid level.
 
The transmission may be in hot mode. Inspect the transmission fluid lines to the radiator. The lines may be pinched, plugged or twisted.
 
It is possible for an internal TCM failure which may not allow sufficient current to operate the solenoids. Verify TCM functionality by commanding the suspected solenoid ON/OFF using the scan tool and listen for a click.
 

Trouble Code: P0742



Torque Converter Clutch (TCC) System - Stuck On

Possible Causes:



Rapid fluctuation in line pressure could set DTC P0742.
 
Inspect for a pressure regulator condition.
 
Inspect for abnormal high or low line pressure.
 
Inspect the connections at the TCM, the TFP manual valve position switch and all other circuit connecting points for an intermittent condition. Refer to Testing for Intermittent Conditions and Poor Connections .
 
Inspect the circuit wiring for an intermittent condition. Refer to Testing for Electrical Intermittents .
 
The customer may notice an engine stalling condition.
 

Trouble Code: P0742



Torque Converter Clutch (TCC) System - Stuck On

Possible Causes:



Rapid fluctuation in line pressure could set DTC P0742.
 
Inspect for a pressure regulator condition.
 
Inspect for abnormal high or low line pressure.
 
Inspect the connections at the TCM, the TFP manual valve position switch and all other circuit connecting points for an intermittent condition. Refer to Testing for Intermittent Conditions and Poor Connections .
 
Inspect the circuit wiring for an intermittent condition. Refer to Testing for Electrical Intermittents .
 
The customer may notice an engine stalling condition.
 
It is possible for an internal TCM failure which may not allow sufficient current to operate the solenoids. Verify TCM functionality by commanding the suspected solenoid ON/OFF using the scan tool and listen for a click.
 

Trouble Code: P0751



1-2 Shift Solenoid Valve Performance - No First or Fourth Gear

Possible Causes:



If you clear DTC P0751, and then cannot set DTC P0751 again, inspect for the following conditions:

Fluid contamination
 
Plugged fluid circuits
 
Restricted fluid circuits
 

Refer to Shift Solenoid Valve State and Gear Ratio .
 

Trouble Code: P0751



1-2 Shift Solenoid Valve Performance - No First or Fourth Gear

Possible Causes:



If you clear DTC P0751, and then cannot set DTC P0751 again, inspect for the following conditions:

Fluid contamination
 
Plugged fluid circuits
 
Restricted fluid circuits
 

Refer to Shift Solenoid Valve State and Gear Ratio .It is possible for an internal TCM failure which may not allow sufficient current to operate the solenoids. Verify TCM functionality by commanding the suspected solenoid ON/OFF using the scan tool and listen for a click.
 

Trouble Code: P0752



1-2 Shift Solenoid Valve Performance - No Second or Third Gear

Possible Causes:



If you clear DTC P0752, and then cannot set DTC P0752 again, inspect for the following conditions:

Fluid contamination
 
Plugged fluid circuits
 
Restricted fluid circuits
 

Refer to Shift Solenoid Valve State and Gear Ratio .
 

Trouble Code: P0752



1-2 Shift Solenoid Valve Performance - No Second or Third Gear

Possible Causes:



If you clear DTC P0752, and then cannot set DTC P0752 again, inspect for the following conditions:

Fluid contamination
 
Plugged fluid circuits
 
Restricted fluid circuits
 

Refer to Shift Solenoid Valve State and Gear Ratio .It is possible for an internal TCM failure which may not allow sufficient current to operate the solenoids. Verify TCM functionality by commanding the suspected solenoid ON/OFF using the scan tool and listen for a click.
 

Trouble Code: P0756



2-3 Shift Solenoid Valve Performance - No First or Second Gear

Possible Causes:



If you clear DTC P0756, and then cannot set DTC P0756 again, inspect for the following conditions:

Fluid contamination
 
Plugged fluid circuits
 
Restricted fluid circuits
 

Refer to Shift Solenoid Valve State and Gear Ratio .
 

Trouble Code: P0756



2-3 Shift Solenoid Valve Performance - No First or Second Gear

Possible Causes:



If you clear DTC P0756, and then cannot set DTC P0756 again, inspect for the following conditions:

Fluid contamination
 
Plugged fluid circuits
 
Restricted fluid circuits
 

Refer to Shift Solenoid Valve State and Gear Ratio .It is possible for an internal TCM failure which may not allow sufficient current to operate the solenoids. Verify TCM functionality by commanding the suspected solenoid ON/OFF using the scan tool and listen for a click.
 

Trouble Code: P0757



2-3 Shift Solenoid Valve Performance - No Third or Fourth Gear

Possible Causes:



If you clear DTC P0757, and then cannot set DTC P0757 again, inspect for the following conditions:

Fluid contamination
 
Plugged fluid circuits
 
Restricted fluid circuits
 

Refer to Shift Solenoid Valve State and Gear Ratio .
 

Trouble Code: P0757



2-3 Shift Solenoid Valve Performance - No Third or Fourth Gear

Possible Causes:



If you clear DTC P0757, and then cannot set DTC P0757 again, inspect for the following conditions:

Fluid contamination
 
Plugged fluid circuits
 
Restricted fluid circuits
 

Refer to Shift Solenoid Valve State and Gear Ratio .It is possible for an internal TCM failure which may not allow sufficient current to operate the solenoids. Verify TCM functionality by commanding the suspected solenoid ON/OFF using the scan tool and listen for a click.
 

Trouble Code: P0833



Clutch Pedal Switch 2 Circuit

Trouble Code: P0842



Transmission Fluid Pressure (TFP) 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 .
 

Trouble Code: P0843



Transmission Fluid Pressure (TFP) Sensor Circuit High 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 .
 

Trouble Code: P0961



Line Pressure Control (PC) Solenoid System Performance

Trouble Code: P0973



1-2 Shift Solenoid (SS) Control Circuit Low Voltage

Trouble Code: P0974



1-2 Shift Solenoid (SS) Control Circuit High Voltage

Trouble Code: P0976



2-3 Shift Solenoid (SS) Control Circuit Low Voltage

Trouble Code: P0977



2-3 Shift Solenoid (SS) Control Circuit High Voltage

Trouble Code: P1101



Intake Air Flow System Performance

Possible Causes:



Any condition that can cause the MAF, MAP, and TP sensors to be shifted in value at the same time will cause this DTC to set.
 
Inspect the harness of the MAF sensor to verify that it is not routed too close to the following components:

Any aftermarket accessories--Refer to Checking Aftermarket Accessories .
 
Any solenoids
 
Any relays
 
Any motors
 

A wide open throttle acceleration from a stop should cause the MAF sensor parameter on the scan tool to increase rapidly. This increase should be from 3-6 g/s at idle to 120 g/s or more at the time of the 1-2 shift. If the increase is not observed, inspect for a restriction in the induction system or the exhaust system.A skewed or stuck engine coolant temperature (ECT) or IAT sensor will cause the calculated models to be inaccurate and may cause this DTC to run when it should not run.A steady or intermittent high resistance of 15 ohms or more on the ignition 1 voltage circuit will cause the MAF sensor values to be skewed high by up to 60 g/s, and may cause this DTC to set. A high resistance will cause a driveability concern before this DTC sets.The BARO that is used by the ECM to calculate the air flow models is initially based on the MAP sensor at key ON. When the engine is running, the ECM will continually update the BARO value near wide open throttle using the MAP sensor and a calculation. A skewed MAP sensor will cause the calculated mass air flow value to be inaccurate and may result in a no start condition. With the ignition ON and the engine OFF, the MAP Sensor parameter varies with the altitude. 101 kPa is the approximate value near sea level. This value will decrease by approximately 3 kPa for every 305 meters (1,000 feet) of altitude.A high resistance on the low reference circuit of the MAP sensor will skew the sensor value and may cause this DTC to set.A short to battery voltage on the 5-volt reference circuit of the MAP sensor will cause this DTC to set.If the condition is intermittent, refer to Inducing Intermittent Fault Conditions and Intermittent Conditions .
 

Trouble Code: P1101



Intake Air Flow System Performance

Possible Causes:



A steady or intermittent high resistance of 15 ohms or greater on the ignition 1 voltage circuit will cause the MAF sensor signal to be increased by as much as 60 g/s. To pinpoint this condition perform a voltage drop test on the circuit.
 
Any type of contamination on the MAF sensor heating elements will degrade the proper operation of the sensor. Certain types of contaminants act as a heat insulator, which will impair the response of the sensor to airflow changes. Water or snow can create the opposite effect, and cause the signal to increase rapidly.
 
Depending on the current ambient temperature, and the vehicle operating conditions, a MAF sensor signal circuit that is shorted to the IAT signal circuit will increase or decrease the MAF sensor signal that is interpreted by the ECM. Additionally it may cause a rapid fluctuation in the IAT Sensor parameter.
 
A skewed or stuck engine coolant temperature (ECT) or IAT sensor will cause the calculated models to be inaccurate and may cause this DTC to run when it should not. Refer to Temperature Versus Resistance .
 

Trouble Code: P1106



Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent High Voltage

Trouble Code: P1107



Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent Low Voltage.

Trouble Code: P1111



Intake Air Temperature (IAT) Sensor Circuit Intermittent High Voltage

Trouble Code: P1112



Intake Air Temperature (IAT) Sensor Circuit Intermittent Low Voltage.

Trouble Code: P1114



Engine Coolant Temperature (ECT) Sensor Circuit Intermittent Low Voltage

Trouble Code: P1115



Engine Coolant Temperature (ECT) Sensor Circuit Intermittent High Voltage

Trouble Code: P1133



HO2S Insufficient Switching Sensor 1

Trouble Code: P1134



HO2S Transition Time Ratio Sensor 1

Trouble Code: P1174



Fuel Trim Cylinder Balance

Possible Causes:



The Fuel Trim Cylinder Balance diagnostic is very sensitive to HO2S design. A non-OE sensor or an incorrect part number may set a false DTC.
 
Monitoring the misfire current counters, or misfire graph, may help to isolate the cylinder that is causing the condition.
 

Trouble Code: P1182



Supercharger Inlet Pressure (SCIP) Sensor Performance

 
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