OBD-II Trouble Code Description for P0329 GMC

Knock Sensor 1 Circuit Input Intermittent

What does this mean?

OBD2 Code P0329 GM definition:
The knock sensor is attached to the cylinder block. It senses engine knocking using a piezoelectric element. A knocking vibration from the cylinder block is sensed as vibrational pressure. This pressure is converted into a voltage signal and sent to the Powertrain Control Module (PCM) or Engine Control Module (ECM).

Symptoms

Possible sumptoms of OBD code P0329 GM
– Engine Light ON (or Service Engine Soon Warning Light) – Lack/Loss of Power

Causes

Possible causes of OBD code P0329 GM
– Knock sensor circuit short to GND. – Knock sensor circuit short to PWR. – Knock sensor circuit open. – Damaged knock sensor. – Powertrain Control Module (PCM The Error code is generally activated on detection of the following conditions: – An intermittent voltage from the sensor is sent to Powertrain Control Module (PCM) or Engine Control Module (ECM)

Possible Solutions

– Repair or resecure harness or connector – Replaced knock sensor