Diagnostic Aids

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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 (3.8L) Knock Sensor Error

Fig 2: Code P0325 Flow Chart (3.8L) Knock Sensor Error