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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 P0324, P0326, or P06B6 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
  1. Engine idling, observe the DTC information with a scan tool. Verify DTC P0325, P0327, P0328, and P06B6 is not set.
    • If DTC P0325, P0327, or P0328 is set with P06B6, refer to DTC P0325, P0327, or P0328 (LUW)  for further diagnosis.
    • If only DTC P06B6 is set and no external knock sensor circuit issues exist, - replace the K20 Engine Control Module.
  2. Ignition OFF, inspect for the conditions listed below:
    • The B68 Knock Sensor for physical damage. A B68 Knock Sensor that is dropped or damaged may cause a DTC to set.
    • The B68 Knock Sensor for proper installation. A B68 Knock Sensor that is loose or over torqued may cause a DTC to set.
    • The B68 Knock Sensor should be free of thread sealant. The B68 Knock Sensor mounting surface should be free of burrs, casting flash, and foreign material.
    • The B68 Knock Sensor must be clear of hoses, brackets, and engine electrical wiring.
    • For loose accessory brackets
    • Inspect for serpentine belt and tensioner wear.
    • Inspect for an engine mechanical condition Symptoms - Engine Mechanical .
      • If a condition is found, repair as necessary.
  3. If there is no mechanical condition, test or replace the B68 Knock Sensor.
  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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