Circuit Description

WARNING: This page is about a different car, the 1997 Pontiac Grand Am, 1997 Oldsmobile Cutlass, 1997 Oldsmobile Achieva, 1997 Chevrolet Malibu, and 1997 Buick Skylark. However, it is still accessible from the selected car via links, so may be relevant.

Knock Sensor (KS) module is located in PCM and is replaceable. KS module reads KS to determine if excessive detonation (knock) is present. If excessive knock is present, PCM will retard timing until knock goes away. When KS module is missing or malfunctioning, PCM will set DTC P0325.

Conditions required to set DTC are:

No CKP, ECT or TP sensor DTCs set.
No IC control, or VSS DTCs set.
Engine running at least 10 seconds.
ECT greater than 149°F (65°C).
PCM detects problem with KS module causing knock to be indicated continuously.
Conditions present for up to 5 seconds.