Circuit Description

Knock sensor is located on side of engine block, under intake manifold. Knock sensor generates voltage when engine block vibrates due to knocking. DTC is set when there is no knock sensor signal to ECM with engine speed at 2000 RPM or more. If DTC P0325 exists, ECM will operate in fail-safe mode which retards the ignition timing to a maximum setting. Possible causes are:

• Knock sensor circuit is open or shorted.
• Defective or loose knock sensor.
• Defective ECM.