CTS 2006-2007, CTS-V 2005-2007, DTS 2006-2007

4.6L V8 VIN Y Auto 1

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4.6L V8 VIN Y Auto

Trouble Code: P0016



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

Possible Causes:



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

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 Circuit Bank 2 Sensor 1

Trouble Code: P0053



HO2S Heater Resistance Bank 1 Sensor 1

Trouble Code: P0054



HO2S Heater Resistance Bank 1 Sensor 2

Trouble Code: P0056



HO2S Heater Control Circuit 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 25 ohms or more on the ignition 1 voltage circuit will cause the MAF sensor values to be skewed high by up to 30 g/s. Use the scan tool to compare the MAF Sensor parameter to a known good vehicle under various operating conditions.
 
A skewed MAP sensor will also cause the first and second intake manifold models to disagree with the actual MAP sensor measurements. Use the scan tool to compare the MAP Sensor parameter to a known good vehicle under various operating conditions.
 
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:



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:



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:



1. A skewed or stuck engine coolant temperature (ECT) or IAT will cause the calculated models to be inaccurate and may cause this DTC to run when it should not. Refer to Temperature Versus Resistance .
 
2. A skewed MAP sensor will also cause the first and second intake manifold models to disagree with the actual MAP sensor measurements. Use a scan tool and compare the MAP Sensor parameter to a known good vehicle under various operating conditions.
 

Trouble Code: P0107



Manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage

Trouble Code: P0108



Manifold Absolute Pressure (MAP) Sensor Circuit High Voltage

Trouble Code: P0112



Intake Air Temperature (IAT) Sensor Circuit Low Voltage

Possible Causes:



If the engine is cold at the initial ignition ON, a properly functioning IAT sensor will gradually increase the scan tool IAT Sensor parameter. This is due to the heat that is generated by the MAF sensor heating elements.
 
Depending on the ambient temperature, an IAT sensor signal circuit or low reference circuit that is shorted to the MAF sensor signal circuit can cause DTC P0113 to set. This condition causes a rapid fluctuation in the IAT Sensor parameter.
 
An IAT sensor signal circuit that is shorted to the MAF sensor ignition circuit can cause DTC P0113 to set.
 

Trouble Code: P0113



Intake Air Temperature (IAT) Sensor Circuit High Voltage

Possible Causes:



If the engine is cold at the initial ignition ON, a properly functioning IAT sensor will gradually increase the scan tool IAT Sensor parameter. This is due to the heat that is generated by the MAF sensor heating elements.
 
Depending on the ambient temperature, an IAT sensor signal circuit or low reference circuit that is shorted to the MAF sensor signal circuit can cause DTC P0113 to set. This condition causes a rapid fluctuation in the IAT Sensor parameter.
 
An IAT sensor signal circuit that is shorted to the MAF sensor ignition circuit can cause DTC P0113 to set.
 

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 ECM 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 -8°C (+18°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 2 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 2 sensors. This conditions results in a greater voltage on the IAT sensor signal circuit, which is interpreted by the ECM as a colder IAT.
 

Trouble Code: P0117



Engine Coolant Temperature (ECT) Sensor Circuit Low Voltage

Possible Causes:



If an engine overheating conditions exists, it is possible to set a DTC P0117. Verify the proper heat range and the operation of the thermostat. Refer to Thermostat Diagnosis .
 
An ECT sensor signal circuit or low reference circuit that is shorted to another 5-volt reference circuit can cause a DTC P0118 to set.
 

Trouble Code: P0118



Engine Coolant Temperature (ECT) Sensor Circuit High Voltage

Possible Causes:



If an engine overheating conditions exists, it is possible to set a DTC P0117. Verify the proper heat range and the operation of the thermostat. Refer to Thermostat Diagnosis .
 
An ECT sensor signal circuit or low reference circuit that is shorted to another 5-volt reference circuit can cause a DTC P0118 to set.
 

Trouble Code: P0120



Throttle Position (TP) Sensor 1 Circuit

Trouble Code: P0121



Throttle Position (TP) Sensor 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:



DTC P0128 occurring with insufficient vehicle interior heating is an indication of improper thermostat operation.
 
Inspect the ECT sensor terminals and the ECT harness connector for corrosion. This condition results in a greater voltage on the ECT sensor signal circuit, which is interpreted by the ECM as a colder ECT.
 
This diagnostic runs in a specific range. Measure and record the resistance of the ECT sensor at various ambient temperatures between -7 to +80°C (+19 to +176°F), then compare those measurements to the Temperature vs Resistance table. Refer to Temperature Versus Resistance .
 
A slight to moderate resistance in the ECT sensor signal circuit or low reference circuit will affect this diagnostic. This condition results in a greater voltage on the ECT sensor signal circuit, which is interpreted by the ECM as a colder ECT.
 

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

Trouble Code: P0154



HO2S Circuit Insufficient Activity Bank 2 Sensor 1

Trouble Code: P0155



HO2S Heater Performance Bank 2 Sensor 1

 
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