Cobalt 2006-2008, G5 2007

2.0L L4 VIN P Std 1

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2.0L L4 VIN P Std

Trouble Code: P0017



Crankshaft Position (CKP) - Exhaust Camshaft Position (CMP) Correlation

Possible Causes:



Inspect the engine for any recent mechanical repairs. An incorrectly installed camshaft position sensor, crankshaft, camshaft, or timing chain can cause this DTC to set.
 
An incorrectly built exhaust camshaft can cause this DTC to set.
 

Trouble Code: P0030



HO2S Heater Control Circuit Sensor 1

Trouble Code: P0033



Supercharger Bypass Valve Solenoid Control Circuit

Possible Causes:



For additional information, review the Boost Control System Description. Refer to Boost Control System Description .
 
If the condition is intermittent, refer to Inducing Intermittent Fault Conditions and Intermittent Conditions .
 

Trouble Code: P0036



HO2S Heater Control Circuit Sensor 2

Trouble Code: P0068



Throttle Body Airflow Performance

Trouble Code: P0069



Supercharger Inlet Pressure (SCIP) - Barometric Pressure (BARO) Correlation

Trouble Code: P0096



Intake Air Temperature (IAT) Sensor 2 Performance

Possible Causes:



Important: Determine the ambient temperature by using an accurate thermometer. If the ignition has been OFF for 8 hours or more, the IAT Sensor 1 parameter, the IAT Sensor 2 parameter and the ECT Sensor parameter should be within 15°C (27°F) of each other and also the ambient temperature. Turn ON the ignition, and immediately observe the parameters. Compare those sensor parameters to each other and also to the ambient temperature, to determine if the IAT Sensor 2 parameter is skewed.
 

Trouble Code: P0097



Intake Air Temperature (IAT) Sensor 2 Circuit Low Voltage

Trouble Code: P0098



Intake Air Temperature (IAT) Sensor 2 Circuit High Voltage

Trouble Code: P0101



Mass Air Flow Sensor Performance

Possible Causes:



Any condition that can cause the MAF, SCIP, and TP sensors to be shifted in value at the same time will cause this DTC to set.
 
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 3-6 g/s at idle to 180 g/s or more at the time of the 2-3 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 1 will cause the calculated models to be inaccurate and may cause this DTC to run when it should not.
 
A skewed MAP sensor may cause this DTC to set.
 
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 gs, 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 PCM to calculate the airflow models is initially based on the BARO sensor at key ON. With the ignition ON and the engine OFF, the BARO 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. Refer to Altitude Versus Barometric Pressure .
 
If the condition is intermittent, refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0102



Mass Air Flow (MAF) Sensor Circuit Low Frequency

Possible Causes:



Inspect for any contamination or debris on the sensing elements of the MAF sensor.
 
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 180 g/s or more at the time of the 2-3 shift. If the increase is not observed, inspect for a restriction in the induction system or the exhaust system.
 
A high resistance of 15 ohms or more on the ground circuit or the ignition 1 circuit of the MAF sensor may cause this DTC to set. A high resistance will cause a driveability concern before this DTC sets.
 
If the condition is intermittent, refer to Inducing Intermittent Fault Conditions and Intermittent Conditions .
 

Trouble Code: P0103



Mass Air Flow (MAF) Sensor Circuit High Frequency

Possible Causes:



Inspect the air induction system for any water intrusion. The water rapidly cools the hot sensing elements in the sensor causing a false indication of excessive air flow. Any water that reaches the MAF sensor will skew the sensor and may cause this DTC to set.
 
A poor connection at the fuse for the ignition 1 voltage circuit of the MAF sensor may cause this DTC to set.
 
If the condition is intermittent, refer to Inducing Intermittent Fault Conditions and Intermittent Conditions .
 

Trouble Code: P0106



Manifold Absolute Pressure (MAP) Sensor Performance

Trouble Code: P0107



Manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage

Trouble Code: P0108



Manifold Absolute Pressure (MAP) Sensor Circuit High Voltage

Trouble Code: P0111



Intake Air Temperature (IAT) Sensor 1 Performance

Possible Causes:



Important: Determine the ambient temperature by using an accurate thermometer.
 
If the ignition has been OFF for 8 hours or more, the IAT Sensor 1 parameter, the IAT Sensor 2 parameter and the ECT Sensor parameter should be within 15°C (27°F) of each other and also the ambient temperature. Turn ON the ignition, and immediately observe the parameters. Compare those sensor parameters to each other and also to the ambient temperature, to determine if the IAT Sensor 1 parameter is skewed.
 
If the engine is cold, then at ignition ON, a properly functioning IAT sensor 1 will gradually increase the scan tool IAT Sensor 1 parameter. This is due to the heat that is generated by the MAF sensor heating elements.
 
With the engine running, and depending on the ambient temperature, an IAT sensor 1 signal circuit that is shorted to the MAF sensor signal circuit can cause a rapid fluctuation in the IAT Sensor 1 parameter and can cause DTC P0111 to set.
 

Trouble Code: P0112



Intake Air Temperature (IAT) Sensor 1 Circuit Low Voltage

Trouble Code: P0113



Intake Air Temperature (IAT) Sensor 1 Circuit High Voltage

Trouble Code: P0116



Engine Coolant Temperature (ECT) Sensor Performance

Possible Causes:



Inspect the ECT sensor terminals for corrosion and for engine coolant leaking through the sensor. Engine coolant that is leaking through the sensor will create a high resistance short to ground. This condition results in less voltage on the ECT sensor signal circuit, which is interpreted by the PCM as a warmer ECT.
 
This diagnostic runs in a specific range. Measure and record the resistance of the ECT sensor at various ambient temperatures greater than -7°C (+19°F), then compare those measurements to the Temperature vs Resistance table. Refer to Temperature Versus Resistance .
 
An IAT sensor that is skewed colder at various ambient temperatures due to greater resistance than is normal will increase the range between these two sensors. Measure and record the resistance of the IAT sensor at various ambient temperatures, then compare those measurements to the Temperature vs Resistance table. Refer to Temperature Versus Resistance .
 
A slight to moderate resistance in the IAT sensor signal circuit or low reference circuit will increase the range between these two sensors. This condition results in a greater voltage on the IAT sensor signal circuit, which is interpreted by the PCM as a colder IAT.
 

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: P0125



Engine Coolant Temperature (ECT) Insufficient For Closed Loop Fuel Control

Trouble Code: P0128



Engine Coolant Temperature (ECT) Below Thermostat Regulating Temperature

Trouble Code: P0130



HO2S Circuit Sensor 1

Trouble Code: P0131



HO2S Circuit Low Voltage Sensor 1

Trouble Code: P0132



HO2S Circuit High Voltage Sensor 1

Trouble Code: P0133



HO2S Slow Response Sensor 1

Trouble Code: P0134



HO2S Circuit Insufficient Activity Sensor 1

Trouble Code: P0135



HO2S Heater Performance Sensor 1

Trouble Code: P0136



HO2S Circuit Malfunction Sensor 2

Trouble Code: P0137



HO2S Circuit Low Voltage Sensor 2

Trouble Code: P0138



HO2S Circuit High Voltage Sensor 2

Trouble Code: P0140



HO2S Circuit Insufficient Activity Sensor 2

Trouble Code: P0141



HO2S Heater Performance Sensor 2

Trouble Code: P0171



Fuel Trim System Lean

Possible Causes:



Test for fuel contamination. Small amounts of water can be delivered to the fuel injectors and cause a lean exhaust indication. A lean exhaust indication can also be caused by too much alcohol in the fuel. Refer to Alcohol/Contaminants-in-Fuel Diagnosis .
 
The system will go lean if an injector is not supplying enough fuel.
 
A lean condition could be present during high fuel demand due to a fuel pump that does not pump enough fuel, a plugged fuel filter, or a restricted fuel pipe.
 
Review the Failure Records with a scan tool. If an intermittent condition is suspected, refer to Intermittent Conditions .
 

Trouble Code: P0172



Fuel Trim System Rich

Possible Causes:



Fuel contamination, such as water and alcohol, will affect the fuel trim.
 
The system will go rich if the injectors are supplying too much fuel.
 
Using the scan tool, review the Failure Records. If an intermittent condition is suspected, refer to Intermittent Conditions .
 

 
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