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Knock Sensor (KS) System Description: Purpose

WARNING: This page is about a different car, the 2005 Saturn Ion Red Line. However, it is still accessible from the selected car via links, so may be relevant.

The knock sensor (KS) system enables the engine control module (ECM) to control the ignition timing for the best possible performance while protecting the engine from potentially damaging levels of detonation. The ECM uses the KS system to test for abnormal engine noise that may indicate detonation, also known as spark knock.

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