Knock Sensor (KS)

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Fig 1: Locating Knock Sensor (KS) Intake Manifold

Courtesy of GENERAL MOTORS CORP.

The knock sensor (KS) (2) is located below the intake manifold (1), on the engine block between cylinder 2 and cylinder 3. The KS detects engine detonation and sends a signal to the PCM. The PCM uses the input from the KS to adjust the ignition timing in order to control detonation. For detailed information on the operation of the KS refer to Knock Sensor (KS) System Description .