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Home >> GMC >> 1996 >> Forward Control 7.4 J >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Tests W/Codes - P Series (Gasoline) >> Diagnostic Trouble Codes >> DTC P0325 - Knock Sensor Module Circuit >> Diagnostic Aids

Diagnostic Aids

Check for poor connections at VCM. Inspect KS module connector for backed out terminals, broken locks, and improperly formed or damaged terminals. Check for damaged or improperly installed KS module. Check for bent pins, deformed terminals, or if KS module is fully seated. Check knock sensor torque specification. Specification should be 14 ft. lbs. (19 N.m). Checking FAIL RECORDS vehicle mileage data since diagnostic test last failed can be useful in determining how often condition causing DTC to set occurs. This may assist in diagnosis.

Fig 1: DTC P0325 Schematic
G96H09018