Circuit Description
WARNING: This page is about a different car, the 1998 Pontiac Bonneville, 1998 Oldsmobile Regency, 1998 Oldsmobile LSS, 1998 Oldsmobile Eighty-Eight, and 1998 Buick LeSabre. 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 for setting DTC:
- System voltage greater than 9 volts.
- PCM detects problem with KS module causing knock to be indicated continuously.
- Conditions present for up to 2.5 seconds.