Knock Sensor (KS) System

The Knock Sensor (KS) detects abnormal vibration, or spark knock, in the engine. The sensor is mounted in the engine block near the cylinders. The knock sensor produces an AC output voltage that increases with the severity of the knock. This signal voltage is sent to the Powertrain Control Module (PCM). The. PCM then adjusts the Ignition Control (IC) timing to reduce the spark knock.

A fault in the KS circuit will set a DTC P0325.