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Home >> Chevrolet >> 2012 >> Cruze Eco, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Engine Controls/Fuel - 1.8L - DTC Diagnostics, Troubleshooting & Diagnosis) >> Diagnostic Information and Procedures >> DTC P0325, P0327, or P0328 (LUW) >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
  1. Engine running, observe the DTC information with a scan tool. Verify DTC P0325, P0327, P0328 or P06B6 are not set.
    • If DTC P0325, P0327, or P0328 is set with P06B6 continue with Circuit/System Testing.
    • If only DTC P06B6 is set, and no external knock sensor circuit issues exist, replace the K20 Engine Control Module.
  2. Move the related harnesses and connectors for the affected knock sensor circuits while observing the scan tool parameters listed below. The parameters should display NO.
    • Cylinder 1 Knock Detected
    • Cylinder 2 Knock Detected
    • Cylinder 3 Knock Detected
    • Cylinder 4 Knock Detected
      • If the parameters change, repair the wiring or the harness connectors.
  3. Observe the DTC information with a scan tool. DTC P0325, P0327, or P0328 should not set.
  4. Operate the vehicle within the conditions for running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the freeze frame/failure records data.
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