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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 111 (Engine Controls - Self-Diagnostics - 2.2L) >> Diagnostic Tests >> DTC P0327: Knock Sensor Circuit >> Diagnostic Aids

Diagnostic Aids

WARNING: This page is about a different car, the 2002 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

Excessive engine noise will not set this DTC.

An open anywhere in KS circuit or short to ground in Dark Blue wire will cause no knock sensor activity and DTC will set.

Normal KS values should vary between 0.2 volt at idle to 2.0 volts at wide open throttle, shown as KS NOISE on scan tool. Voltage should increase with RPM.

Ensure KS is installed properly and is tightened to 19 ft. lbs. (25 N.m). Ensure correct fuel octane level is being used.

Knock sensor resistance should be infinite (open).

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