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Home › Chevrolet › 2008 › Optra LS, Automatic › Repair and Diagnosis › Engine Performance › System › Engine Controls And Fuel - 1.4L DOHC › Diagnostic Information and Procedures › DTC P0133 › Circuit/System Verification

Circuit/System Verification

  1. Engine running, observe the DTC information parameter with a scan tool. Verify other DTCs are not set.
  2. Observe the DTC information parameter with a scan tool. DTCs P0133 or P0139 should not set.
  3. 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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