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Home >> Isuzu >> 2003 >> Ascender 5.3 P, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - 5.3L >> Diagnostic Tests >> DTC P0325: Knock Sensor Module Circuit >> Description

DTC P0325: Knock Sensor Module Circuit: Description

The knock sensors produce an AC signal under all engine operating conditions. The Powertrain Control Module (PCM) calculates the average voltage range of each knock sensor signal. If the knock sensor system is operating normally, the PCM should monitor the knock sensor voltage varying greater than and less than a calculated average voltage. This DTC will set if the PCM malfunctions in a manner that will not allow proper diagnosis of the knock sensor system.

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