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Home >> Chevrolet >> 2011 >> Caprice >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 6.0L - DTC Diagnostics And Troubleshooting >> Diagnostic Information and Procedures >> DTC P0300-P0308 >> Circuit/System Verification

Circuit/System Verification

  1. Engine idling, verify there is no abnormal engine noise.
  2. Observe the DTC information with a scan tool. Verify that DTC P0201-P0208, P0315, P0335, P0336, P0351-P0358 are not set.
    3. NOTE:
    • A misfire may only occur when the engine is under load. An engine load may be necessary to verify the condition.
    • Random misfires that are not steadily incrementing may be normal.
  3. Observe the Misfire Current Counters with a scan tool. The Misfire Current Counters should not be incrementing.
  4. Operate the vehicle within the Conditions for Running the DTC to verify that 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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