Circuit Description

The front knock sensor is located on left side of cylinder block under intake manifold. Sensor generates voltage when engine block vibrates due to knocking. DTC is set when there is an open or short in knock sensor circuit to ECM with engine speed between 2050-5950 RPM. Possible causes are:

Open or short in knock sensor circuit.
Knock sensor (loose).
ECM.

NOTE: Conduct following test drive confimation procedure to simulate DTC detecting condition after DTC is recorded, and to confirm malfunction is corrected after repair.

CAUTION: If test conditions are not strictly followed, detection of malfunction will not be possible.