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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 15 (Engine Controls And Fuel - 2.4L - DTC P0114 To DTC P0604) >> Diagnostic Information and Procedures >> DTC P0131, P0132, P0134, P0137, P0138, P0140, or P2A00: HO2S Circuit >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
  1. Ignition ON
  2. Verify no HO2S heater DTCs are set.
    • If a DTC is not set 
  3. Engine running.
  4. Verify the scan tool HO2S1 or 2 parameters are between 50-1,050mV.
    • If not between 50-1,050mV 

      Refer to Circuit/System Testing.

    • If between 50-1,050mV 
  5. 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.
  6. Verify the DTC does not set.
    • If the DTC sets 

      Refer to Circuit/System Testing.

    • If the DTC does not set 
  7. All OK.
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