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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 15 (Engine Controls And Fuel - 2.4L - DTC P0114 To DTC P0604) >> Diagnostic Information and Procedures >> DTC P0325, P0327, or P0328: Knock Sensor >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
  1. Engine Running
  2. Verify DTC P0325, P0327 or P0328 is not set.
    • If the DTC is set 

      Refer to Circuit/System Testing.

    • If the DTC is not set 
  3. Verify the B68 Knock Sensor mounting bolt is properly tightened. Refer to Fastener Tightening Specifications .
    • If not tightened to the correct specification 

      Repair a necessary.

    • If tightened to the correct specification 
  4. Verify the scan tool parameters listed below display No while moving the related harnesses and connectors of the B68 Knock Sensor.
    • Cylinder 1 Knock Detected
    • Cylinder 2 Knock Detected
    • Cylinder 3 Knock Detected
    • Cylinder 4 Knock Detected
    • If No is not displayed 

      Repair the wiring harness or connectors.

    • If No is displayed 
  5. Operate the vehicle within the conditions for running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
  6. Verify the DTC does not set.
    • If the DTC sets 

      Refer to Circuit/System Testing.

    • If the DTC does not set 
  7. All OK.
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