DTC P0327: Knock Sensor No. 1 Circuit; P0332: Knock Sensor No. 2 Circuit: Description
WARNING: This page is about a different variant/trim than selected.
Knock Sensor (KS) system is used to detect engine detonation. Powertrain Control Module (PCM) will retard spark timing based on signals from KS module. KS produces an AC signal voltage that is sent to KS module. The amount of AC voltage produced is proportional to amount of knock.
When engine is operating, PCM will learn minimum and maximum frequency of noise engine produces.