DTC P0325: Knock Sensor Module Performance: Description

Knock Sensor (KS) module is located in Powertrain Control Module (PCM). KS module monitors both knock sensors to determine if detonation is present. If excessive knock is present, PCM will retard timing until knock goes away. When KS module is missing or malfunctioning, KS circuit voltage going to PCM will go low. PCM interprets this low signal as spark knock.