Possible causes – Faulty Intake Manifold Tuning Valve (IMTV)– Intake Manifold Tuning Valve harness is open or shorted– Intake Manifold Tuning Valve circuit poor electrical connection When is the code detected? The Engine Control Module (ECM) has detected an improper

Possible causes – Faulty Intake Manifold Tuning Valve (IMTV)– Intake Manifold Tuning Valve harness is open or shorted– Intake Manifold Tuning Valve circuit poor electrical connection When is the code detected? The Engine Control Module (ECM) has detected an improper

Possible causes – Faulty Intake Valve Control Solenoid Bank 1– Intake Valve Control Solenoid Circuit Bank 1 harness is open or shorted– Intake Valve Control Solenoid Circuit Bank 1 circuit poor electrical connection When is the code detected? An improper

Possible causes – Faulty Intake Valve Control Solenoid Bank 1– Intake Valve Control Solenoid Circuit Bank 1 harness is open or shorted– Intake Valve Control Solenoid Circuit Bank 1 circuit poor electrical connection When is the code detected? An improper

Possible causes – Faulty Intake Valve Control Solenoid Bank 1– Intake Valve Control Solenoid Circuit Bank 1 harness is open or shorted– Intake Valve Control Solenoid Circuit Bank 1 circuit poor electrical connection When is the code detected? An improper

Possible causes – Faulty Intake Valve Control Solenoid Valve– Intake Valve Control Solenoid Circuit harness is open or shorted– Intake Valve Control Solenoid Circuit circuit poor electrical connection When is the code detected? An improper voltage is sent to the

Possible causes – Faulty Intake Valve Control Solenoid Valve– Intake Valve Control Solenoid Circuit harness is open or shorted– Intake Valve Control Solenoid Circuit circuit poor electrical connection When is the code detected? An improper voltage is sent to the

Possible causes – Faulty knock sensor– Knock sensor circuit poor electrical connection– Knock sensor harness is open or shorted– Faulty Engine Control Module (ECM) Tech notes The P0325 code means that the Knock Sensor is not working properly. Problems with

Possible causes – Faulty knock sensor– Knock sensor circuit poor electrical connection– Knock sensor harness is open or shorted– Faulty Engine Control Module (ECM) Tech notes The P0326 code means that the Knock Sensor is not working properly. Problems with

Possible causes – Faulty knock sensor– Knock sensor circuit poor electrical connection– Knock sensor harness is open or shorted– Faulty Engine Control Module (ECM) Tech notes The P0327 code means that the Knock Sensor is not working properly. Problems with

Possible causes – Faulty knock sensor– Knock sensor circuit poor electrical connection– Knock sensor harness is open or shorted– Faulty Engine Control Module (ECM) Tech notes The P0328 code means that the Knock Sensor is not working properly. Problems with

Possible causes – Faulty knock sensor– Knock sensor circuit poor electrical connection– Knock sensor harness is open or shorted– Faulty Engine Control Module (ECM) Tech notes The P0330 code means that the Knock Sensor is not working properly. Problems with

Possible causes – Faulty knock sensor– Knock sensor circuit poor electrical connection– Knock sensor harness is open or shorted– Faulty Engine Control Module (ECM) Tech notes The P0331 code means that the Knock Sensor is not working properly. Problems with

Possible causes – Faulty Malfunction Indicator Lamp Bulb– Malfunction Indicator Lamp Bulb harness is open or shorted– Malfunction Indicator Lamp Bulb circuit poor electrical connection– Faulty Engine Control Module (ECM) When is the code detected? – An excessively high voltage

Possible causes – Faulty Manifold Absolute Pressure sensor– Manifold Absolute Pressure harness is open or shorted– Manifold Absolute Pressure sensor circuit poor electrical connection– Faulty Engine Control Module (ECM) When is the code detected? An excessively low or high voltage

Possible causes – Faulty Manifold Absolute Pressure sensor– Manifold Absolute Pressure harness is open or shorted– Manifold Absolute Pressure sensor circuit poor electrical connection– Faulty Engine Control Module (ECM) When is the code detected? The Engine Control Module (ECM) has

Possible causes – Faulty Manifold Absolute Pressure sensor– Manifold Absolute Pressure harness is open or shorted– Manifold Absolute Pressure sensor circuit poor electrical connection– Faulty Engine Control Module (ECM) When is the code detected? The ECM has detected a performance

Possible causes – Faulty Manifold Absolute Pressure sensor– Manifold Absolute Pressure harness is open or shorted– Manifold Absolute Pressure sensor circuit poor electrical connection– Faulty Engine Control Module (ECM) When is the code detected? The sensor signal to the ECM

Possible causes – Faulty Manifold Absolute Pressure sensor– Manifold Absolute Pressure harness is open or shorted– Manifold Absolute Pressure sensor circuit poor electrical connection– Faulty Powertrain Control Module (PCM) When is the code detected? An excessively low or high voltage

Possible causes – Faulty Manifold Absolute Pressure sensor– Manifold Absolute Pressure harness is open or shorted– Manifold Absolute Pressure sensor circuit poor electrical connection– Faulty Powertrain Control Module (PCM) When is the code detected? An excessively low or high voltage