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Home >> Chevrolet >> 2004 >> SSR >> Repair and Diagnosis >> External Pages >> Different car >> Section 686 (Engine Control System - 5.3L - Introduction) >> Description and Operation >> Knock Sensor (KS) System Description >> Purpose

Knock Sensor (KS) System Description: Purpose

WARNING: This page is about a different car, the 2003 Chevrolet SSR. However, it is still accessible from the selected car via links, so may be relevant.

The knock sensor (KS) system enables the powertrain control module (PCM) to control the ignition timing advance for the best possible performance while protecting the engine from potentially damaging levels of detonation. The sensors in the KS system are used by the PCM as microphones to listen for abnormal engine noise that may indicate pre-ignition/detonation.

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