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Home >> Volvo >> 2000 >> S40 >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Computerized Engine Controls >> Input Devices >> Knock Sensor
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Knock Sensor

Knock Sensor (KS) detects knocking (detonation) and sends signal to ECM. ECM is able to gradually retard ignition timing to each individual cylinder. If knocking does not stop, a signal is sent to ECM to enrich air/fuel mixture.

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