P1602 - BUICK, CADILLAC, CHEVROLET, GMC: KNOCK SENSOR MODULE PERFORMANCE CONDITIONS
POST UPDATED IN June, 2023
P1602 - BUICK, CADILLAC, CHEVROLET, GMC: KNOCK SENSOR MODULE PERFORMANCE CONDITIONS
The Knock Sensor is an electronic device installed on the intake manifold, engine block, or cylinder. This sensor detects unusual knocks or pulsations that cause engine detonations. It could be described as the ear of the engine’s computer, which is used to determine how good the engine is performing.
Any detonation coming from the engine is shown as a small vibration, which is detected by the Knock Sensor. This is responsible for changing the vibration into a voltage signal that is transmitted to the control module that manages the ignition system (ECM/PCM). This alters the ignition timing settings based on the signal received.
The P1602 OBDII diagnostic code is set when the engine is running and the Engine Coolant Temperature Sensor input is above 104°F, the PCM has noticed a failure in the Internal Knock Sensor Module or its circuitry.
The reasons why the storage of the DTC P1602 OBD2 DTC occurs are:
The steps for troubleshooting the P1602 OBDII fault code are as follows: