Circuit Description

ECM employs an internal circuit to continuously monitor knock control evaluation circuit. Knock Sensor (KS) module circuit contains circuitry that allows ECM to utilize KS signals and diagnose KS sensors and circuitry. KS module is not a replaceable component. If ECM detects a fault in ability of circuit to sample these signals, this DTC will set.

DTC will also set when ECM detects a fault in internal knock sensor control circuit.