Envoy, Rainer, Trailblazer 2006-2007

6.0L V8 VIN H Auto 1

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6.0L V8 VIN H Auto

Trouble Code: C0241



Pulse Width Modulated (PWM) Requested Torque

Possible Causes:

Thoroughly inspect connections or circuitry that may cause an intermittent malfunction. Refer to the following:



Testing for Electrical Intermittents
 
Testing for Intermittent Conditions and Poor Connections
 
Wiring Repairs
 
Connector Repairs
 

Trouble Code: C0244



Pulse Width Modulated (PWM) Delivered Torque

Possible Causes:

Thoroughly inspect connections or circuitry that may cause an intermittent malfunction. Refer to the following:



Testing for Electrical Intermittents
 
Testing for Intermittent Conditions and Poor Connections
 
Wiring Repairs
 
Connector Repairs
 

Trouble Code: P0016



Crankshaft Position (CKP) Camshaft Position (CMP) Correlation

Trouble Code: P0030



HO2S Heater Control Circuit Bank 1 Sensor 1

Trouble Code: P0036



HO2S Heater Control Circuit Bank 1 Sensor 2

Trouble Code: P0050



HO2S Heater Control Bank 2 Sensor 1

Trouble Code: P0053



HO2S Heater Resistance Circuit Bank 1 Sensor 1

Trouble Code: P0054



HO2S Heater Resistance Circuit Bank 1 Sensor 2

Trouble Code: P0056



HO2S Heater Control Bank 2 Sensor 2

Trouble Code: P0059



HO2S Heater Resistance Bank 2 Sensor 1

Trouble Code: P0060



HO2S Heater Resistance Bank 2 Sensor 2

Trouble Code: P0068



Throttle Body Airflow Performance

Trouble Code: P0101



Mass Air Flow (MAF) Sensor 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: P0102



Mass Air Flow (MAF) Sensor Circuit Low Frequency

Possible Causes:



Verify the integrity of the air induction system by inspecting for the following conditions:

A restricted or collapsed air intake duct
 
A misaligned air intake duct
 
A dirty or deteriorating air filter element
 
Any objects blocking the air inlet screen of the MAF/IAT sensor
 
Any water intrusion in the induction system
 
Any contamination or debris on the sensing elements of the MAF sensor
 
Damaged components
 
Loose or improper installation
 
Any air flow restriction
 
Any vacuum leak
 

A wide open throttle (WOT) acceleration from a stop should cause the MAF sensor parameter on the scan tool to increase rapidly. This increase should be from 2-6 g/s at idle to 100 g/s or more at the time of the 1-2 shift.Verify that any electrical aftermarket devices are properly connected and grounded. Refer to Checking Aftermarket Accessories .
 

Trouble Code: P0103



Mass Air Flow (MAF) Sensor Circuit High Frequency

Possible Causes:



Verify the integrity of the air induction system by inspecting for the following conditions:

A restricted or collapsed air intake duct
 
A misaligned air intake duct
 
A dirty or deteriorating air filter element
 
Any objects blocking the air inlet screen of the MAF/IAT sensor
 
Any water intrusion in the induction system
 
Any contamination or debris on the sensing elements of the MAF sensor
 
Damaged components
 
Loose or improper installation
 
Any air flow restriction
 
Any vacuum leak
 

A wide open throttle (WOT) acceleration from a stop should cause the MAF sensor parameter on the scan tool to increase rapidly. This increase should be from 2-6 g/s at idle to 100 g/s or more at the time of the 1-2 shift.Verify that any electrical aftermarket devices are properly connected and grounded. Refer to Checking Aftermarket Accessories .
 

Trouble Code: P0106



Manifold Absolute Pressure (MAP) Sensor Performance

Possible Causes:



A wide open throttle (WOT) acceleration from a stop should cause the MAP sensor parameter on the scan tool to increase rapidly to near the BARO parameter at the time of the 1-2 shift.
 
A skewed or stuck engine coolant temperature (ECT) sensor 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 .
 
The barometric pressure (BARO) that is used by the ECM to calculate the air flow models is initially based on the MAP sensor at the ignition ON. When the engine is running, the ECM will continually update the BARO value near WOT using the MAP sensor and a calculation. A skewed MAP sensor will cause the BARO value to be inaccurate.
 

Trouble Code: P0107



Manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage

Possible Causes:

Verify the integrity of the MAP sensor system by inspecting for the following conditions:



Intake manifold vacuum leaks
 
Any damage to the MAP sensor housing
 
Any damage to the MAP sensor seal
 
A loose or improperly installed MAP sensor
 
A restriction in the vacuum source of the MAP sensor
 

Trouble Code: P0108



Manifold Absolute Pressure (MAP) Sensor Circuit High Voltage

Possible Causes:

Verify the integrity of the MAP sensor system by inspecting for the following conditions:



Intake manifold vacuum leaks
 
Any damage to the MAP sensor housing
 
Any damage to the MAP sensor seal
 
A loose or improperly installed MAP sensor
 
A restriction in the vacuum source of the MAP sensor
 

Trouble Code: P0112



Intake Air Temperature (IAT) Sensor Circuit Low Voltage

Trouble Code: P0113



Intake Air Temperature (IAT) Sensor Circuit High Voltage

Trouble Code: P0116



Engine Coolant Temperature (ECT) Sensor Performance

Trouble Code: P0117



Engine Coolant Temperature (ECT) Sensor Circuit Low Voltage

Trouble Code: P0118



Engine Coolant Temperature (ECT) Sensor Circuit High Voltage

Trouble Code: P0120



Throttle Position (TP) Sensor 1 Circuit

Trouble Code: P0121



Throttle Position (TP) Sensor 1 Performance

Trouble Code: P0122



Throttle Position (TP) Sensor 1 Circuit Low Voltage

Trouble Code: P0123



Throttle Position (TP) Sensor 1 Circuit High Voltage

Trouble Code: P0128



Engine Coolant Temperature (ECT) Below Thermostat Regulating Temperature

Possible Causes:



Inspect the ECT sensor terminals for corrosion, and for engine coolant leaking through the sensor.
 

Trouble Code: P0131



HO2S Circuit Low Voltage Bank 1 Sensor 1

Trouble Code: P0132



HO2S Circuit High Voltage Bank 1 Sensor 1

Trouble Code: P0133



HO2S Slow Response Bank 1 Sensor 1

Trouble Code: P0134



HO2S Circuit Insufficient Activity Bank 1 Sensor 1

Trouble Code: P0135



HO2S Heater Performance Bank 1 Sensor 1

Trouble Code: P0137



HO2S Circuit Low Voltage Bank 1 Sensor 2

Trouble Code: P0138



HO2S Circuit High Voltage Bank 1 Sensor 2

Trouble Code: P0140



HO2S Circuit Insufficient Activity Bank 1 Sensor 2

Trouble Code: P0141



HO2S heater Performance Bank 1 Sensor 2

Trouble Code: P0151



HO2S Circuit Low Voltage Bank 2 Sensor 1

Trouble Code: P0152



HO2S Circuit High Voltage Bank 2 Sensor 1

Trouble Code: P0153



HO2S Slow Response Bank 2 Sensor 1

 
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