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Knock Sensor: Testing and Inspection

Abnormal Knock Sensor Signal:

If the PCM malfunctions in a manner which will not allow proper diagnosis of the knock sensor system, DTC PO325 will set.

DTCs PO327 and PO332 are designed to diagnose the knock sensors, and related wiring. Problems encountered with the KS system should set a DTC. However, if the customer's complaint is detonation/spark knock, use the tables for DTC PO327 or PO332 to diagnose the condition.