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

4.6L V8 VIN 9 Auto 3

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Trouble Code: P0328



Knock Sensor (KS) Circuit High Voltage Bank 1

Possible Causes:



Inspect the KS for physical damage. A KS that is dropped or damaged may cause a DTC to set.
 
Inspect the KS for proper installation. A KS that is loose or over torqued may cause a DTC to set.
 
The KS must be free of burrs, casting flash, and foreign material.
 

Trouble Code: P0330



Knock Sensor (KS) Circuit Bank 2

Possible Causes:



Inspect the KS for physical damage. A KS that is dropped or damaged may cause a DTC to set.
 
Inspect the KS for proper installation. A KS that is loose or over torqued may cause a DTC to set. The KS should be free of thread sealant. The KS mounting surface should be free of burrs, casting flash, and foreign material.
 
The KS must be clear of hoses, brackets, and engine electrical wiring.
 

Trouble Code: P0330



Knock Sensor (KS) Circuit Bank 2

Possible Causes:



Inspect the KS for physical damage. A KS that is dropped or damaged may cause a DTC to set.
 
Inspect the KS for proper installation. A KS that is loose or over torqued may cause a DTC to set.
 
The KS must be free of burrs, casting flash, and foreign material.
 

Trouble Code: P0331



Knock Sensor (KS) Circuit

Possible Causes:



Inspect the KS for physical damage. A KS that is dropped or damaged may cause a DTC to set.
 
Inspect the KS for proper installation. A KS that is loose or over torqued may cause a DTC to set. The KS should be free of thread sealant. The KS mounting surface should be free of burrs, casting flash, and foreign material.
 
The KS must be clear of hoses, brackets, and engine electrical wiring.
 

Trouble Code: P0331



Knock Sensor (KS) Circuit

Possible Causes:



Inspect the KS for physical damage. A KS that is dropped or damaged may cause a DTC to set.
 
Inspect the KS for proper installation. A KS that is loose or over torqued may cause a DTC to set.
 
The KS must be free of burrs, casting flash, and foreign material.
 

Trouble Code: P0332



Knock Sensor (KS) Circuit Bank 2

Possible Causes:



Inspect the KS for physical damage. A KS that is dropped or damaged may cause a DTC to set.
 
Inspect the KS for proper installation. A KS that is loose or over torqued may cause a DTC to set. The KS should be free of thread sealant. The KS mounting surface should be free of burrs, casting flash, and foreign material.
 
The KS must be clear of hoses, brackets, and engine electrical wiring.
 

Trouble Code: P0332



Knock Sensor (KS) Circuit Low Voltage Bank 2

Possible Causes:



Inspect the KS for physical damage. A KS that is dropped or damaged may cause a DTC to set.
 
Inspect the KS for proper installation. A KS that is loose or over torqued may cause a DTC to set.
 
The KS must be free of burrs, casting flash, and foreign material.
 

Trouble Code: P0333



Knock Sensor (KS) Circuit High Bank 2

Possible Causes:



Inspect the KS for physical damage. A KS that is dropped or damaged may cause a DTC to set.
 
Inspect the KS for proper installation. A KS that is loose or over torqued may cause a DTC to set. The KS should be free of thread sealant. The KS mounting surface should be free of burrs, casting flash, and foreign material.
 
The KS must be clear of hoses, brackets, and engine electrical wiring.
 

Trouble Code: P0333



Knock Sensor (KS) Circuit High Voltage Bank 2

Possible Causes:



Inspect the KS for physical damage. A KS that is dropped or damaged may cause a DTC to set.
 
Inspect the KS for proper installation. A KS that is loose or over torqued may cause a DTC to set.
 
The KS must be free of burrs, casting flash, and foreign material.
 

Trouble Code: P0335



Crankshaft Position (CKP) Sensor Circuit

Possible Causes:



Inspect the CKP sensor connector and the ECM connector for corrosion.
 

Trouble Code: P0336



Crankshaft Position (CKP) Sensor Performance

Possible Causes:



Inspect the CKP sensor connector and the ECM connector for corrosion.
 

Trouble Code: P0340



Camshaft Position (CMP) Sensor Circuit

Possible Causes:



Inspect the 10-way engine harness to fuel injector harness connector, the CMP sensor connector, and the ECM connector for corrosion.
 

Trouble Code: P0341



Camshaft Position (CMP) Sensor Performance

Possible Causes:



Inspect the 10-way engine harness to fuel injector harness connector, the CMP sensor connector, and the ECM connector for corrosion.
 

Trouble Code: P0342



CMP Sensor Signal Range/Performance

Possible Causes:



Inspect the 10-way engine harness to fuel injector harness connector, the CMP sensor connector, and the ECM connector for corrosion.
 

Trouble Code: P0351



Ignition Coil 1 Control Circuit

Trouble Code: P0352



Ignition Coil 2 Control Circuit

Trouble Code: P0353



Ignition Coil 3 Control Circuit

Trouble Code: P0354



Ignition Coil 4 Control Circuit

Trouble Code: P0355



Ignition Coil 5 Control Circuit

Trouble Code: P0356



Ignition Coil 6 Control Circuit

Trouble Code: P0357



Ignition Coil 7 Control Circuit

Trouble Code: P0358



Ignition Coil 8 Control Circuit

Trouble Code: P0401



Exhaust Gas Recirculation (EGR) Flow Insufficient

Possible Causes:

Inspect for the following conditions:



A vacuum restriction to the MAP sensor--A skewed MAP sensor reading can cause the ECM to read incorrect MAP changes during the EGR flow test.
 
An engine that is running poorly due to a mechanical condition such as worn piston rings, worn camshaft, etc.--These types of conditions can cause low engine vacuum and thus can cause a less than expected MAP changes during the flow test.
 
Excessive back pressure in the exhaust system may cause this DTC to set. This condition can cause low engine vacuum and thus can cause a less than expected MAP changes during the EGR flow test. Possible causes of this could be a restriction in the exhaust system or non original equipment manufacture (OEM) exhaust parts.
 
Exhaust system leaks can cause an insufficient amount of EGR flow through the EGR valve. This condition can cause a less than expected MAP changes due to insufficient exhaust back pressure. Possible causes of this could be a leaking exhaust system, a leaking EGR pipe, or non original equipment manufacture (OEM) exhaust parts.
 
A restriction in the intake manifold such as carbon deposits and casting flash
 

Trouble Code: P0401



Exhaust Gas Recirculation (EGR) Flow Insufficient

Trouble Code: P0403



Exhaust Gas Recirculation (EGR) Solenoid Control Circuit

Trouble Code: P0403



Exhaust Gas Recirculation (EGR) Solenoid Control Circuit

Possible Causes:



Inspect for excessive deposits on the EGR valve pintle or seat. Remove the EGR valve and inspect for deposits that may interfere with the EGR valve pintle extending completely or cause the pintle to stick.
 

Trouble Code: P0404



Exhaust Gas Recirculation (EGR) Open Position Performance

Possible Causes:



Inspect for excessive deposits on the EGR pintle or seat. Inspect for deposits that may interfere with the EGR valve pintle extending completely or cause the pintle to stick.
 
If the condition is intermittent, refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0404



Exhaust Gas Recirculation (EGR) Open Position Performance

Possible Causes:



Inspect for excessive deposits on the EGR valve pintle or seat. Remove the EGR valve and inspect for deposits that may interfere with the EGR valve pintle extending completely or cause the pintle to stick.
 

Trouble Code: P0405



Exhaust Gas Recirculation (EGR) Position Sensor Circuit Low Voltage

Trouble Code: P0405



Exhaust Gas Recirculation (EGR) Position Sensor Circuit Low Voltage

Possible Causes:



Inspect for excessive deposits on the EGR valve pintle or seat. Remove the EGR valve and inspect for deposits that may interfere with the EGR valve pintle extending completely or cause the pintle to stick.
 

Trouble Code: P0406



Exhaust Gas Recirculation (EGR) Position Sensor Circuit High Voltage

Trouble Code: P0406



Exhaust Gas Recirculation (EGR) Position Sensor Circuit High Voltage

Possible Causes:



Inspect for excessive deposits on the EGR valve pintle or seat. Remove the EGR valve and inspect for deposits that may interfere with the EGR valve pintle extending completely or cause the pintle to stick.
 

Trouble Code: P0411



Secondary Air Injection (AIR) System Incorrect Air Flow Detected

Trouble Code: P0412



Secondary Air Injection (AIR) Solenoid Control Circuit

Trouble Code: P0418



Secondary Air Injection (AIR) Pump Control Circuit

Trouble Code: P0420



Catalyst System Low Efficiency

Trouble Code: P042E



Exhaust Gas Recirculation (EGR) Closed Position Performance

Possible Causes:



Inspect for excessive deposits on the EGR valve pintle or seat. Remove the EGR valve and inspect for deposits that may interfere with the EGR valve pintle extending completely or cause the pintle to stick.
 

Trouble Code: P0442



Evaporative Emissions (EVAP) System Small Leak Detected

Possible Causes:



To help locate intermittent leaks, use the J 41413-200 to introduce smoke into the EVAP system. Move all EVAP components while observing smoke with the J 41413-SPT .
 
To improve the visibility of the smoke exiting the EVAP system, observe the suspected leak area from different angles with the J 41413-SPT .
 
A condition may exist where a leak in the EVAP system only exists under a vacuum condition. By using the scan tool Purge/Seal function to create a vacuum, seal the system and observe the FTP parameter for vacuum decay, this type of leak may be detected.
 

Trouble Code: P0443



Evaporative Emission (EVAP) Purge Solenoid Control Circuit

Trouble Code: P0446



Evaporative Emissions (EVAP) Vent System Performance

Possible Causes:



An intermittent condition could be caused by a damaged EVAP vent housing, a temporary blockage at the EVAP canister vent solenoid valve inlet, or a pinched vent hose. A blockage in the vent system will also cause a poor fuel fill problem.
 
An EVAP canister filter that is restricted can cause this DTC to set. Refer to Evaporative Emission Canister Replacement .
 

 
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