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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 P0335 To DTC P2635 And Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> DTC P2096 or P2097: Post Catalyst Fuel Trim System Low/High Limit >> Circuit/System Verification

Circuit/System Verification

  1. Ignition ON.
  2. Verify no other HO2S or fuel trim DTC is set.
    • If no other HO2S or fuel trim DTC is set 
  3. Verify DTC P2096 or P2097 is not set.
    • If a DTC is set 

      Refer to Circuit/System Testing.

    • If no DTC is set 
  4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed in the Freeze Frame/Failure Records data.
  5. Verify DTC P2096 or P2097 is not set.
    • If a DTC is set 

      Refer to Circuit/System Testing.

    • If no DTC is set 
  6. All OK.
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