Your Vehicle: 2001 Ford Escort ZX2 L4-2.0L DOHC VIN 3
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  Description and Operation  

Knock Sensor

Two Types Of Knock Sensor (KS)

The Knock Sensor (KS) (Figure 35) is a tuned accelerometer on the engine which converts engine vibration to an electrical signal. The PCM uses this signal to determine the presence of engine knock and to retard spark timing.