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Home › Pontiac › 2009 › Vibe Base, 1.8 8, Automatic › Repair and Diagnosis › Engine Performance › System › Engine Control System & Fuel System - 1.8L (Lay) - DTC P0010 To DTC P0420 › DTC P0420 › Circuit/System Verification

Circuit/System Verification

  1. Engine running, observe the DTC information with a scan tool. Verify there are no other DTCs set.
  2. 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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