Circuit Description

Knock sensors are located on either side of cylinder block, under intake manifold. Knock sensor generates voltage when engine block vibrates due to knocking. DTC P0325 is for bank that includes cylinder No. 1. DTC P0330 is for bank that does not include cylinder No. 1. DTC is set when there is no knock sensor signal to ECM with engine speed 2000-5600 RPM. ECM will operate in fail-safe mode if DTC P0325 or DTC P0330 is set. Possible causes are:

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