Diagnostic Aids

Check signal circuit for a intermittent open or short to ground. Also check for proper installation of PROM. If knock sensor circuit is routed too close to secondary ignition wires, it may induce a voltage and cause a false knock signal.

Fig 1: Code P0325 Schematic (3.4L) Knock Sensor Error (Single Sensor)

Fig 2: Code P0325 Diagnostic Flow Chart (3.4L) Knock Sensor Error (Single Sensor)