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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls And Fuel - 2.0L (LTG) - DTC P0010 To DTC P0333 >> Diagnostic Information and Procedures >> DTC P0030, P0031, P0032, P0036, P0037, P0038, P0053, P0054, P0135, or P0141: HO2S Heater >> Circuit/System Verification

Circuit/System Verification

  1. Engine running.
  2. Verify the parameters listed below do not display Malfunction:
    • HO2S1 or 2 Heater Control Circuit Low Voltage Test Status
    • HO2S1 or 2 Heater Control Circuit Open Test Status
    • HO2S1 or 2 Heater Control Circuit High Voltage Test Status
    • If Malfunction is displayed 

      Refer to Circuit/System Testing

    • If Malfunction is not displayed 
  3. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
  4. Verify the DTC does not set.
    • If the DTC sets 

      Refer to Circuit/System Testing

    • If the DTC does not fail 
  5. All OK.
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