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Home >> Ford >> 2003 >> Focus SVT, 4D Hatchback >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Theory & Operation - CNG, Flex-Fuel & Gasoline >> Computerized Engine Controls >> Input Devices >> Knock Sensor
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Knock Sensor

The Knock Sensor (KS) is a tuned accelerometer located on the engine, which converts engine vibration to an electrical signal. PCM uses this signal to determine the presence of engine knock and retards spark timing accordingly.