Component Inspection

The scan tool has two data displays available for diagnosing the knock sensor (KS) system. The two displays are described as follows:
- Knock Retard indicates the number of degrees that the spark timing is being retarded due to a knock condition.
- KS Noise Channel indicates the current voltage level being monitored on the noise channel.

DTCs P0325 and P0327 are designed to diagnose the KS module, the knock sensor, and the related wiring. The problems encountered with the KS system should set a DTC. However, if no DTC was set but the KS system is suspect because of a detonation complaint, refer to Detonation/Spark Knock in Symptoms.