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Home >> GMC >> 2016 >> Terrain SL, Gas >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 15 (Engine Controls And Fuel - 3.6L (LFX) - DTC P0010 To DTC P0346) >> Diagnostic Information and Procedures >> DTC P0171, P0172, P0174, or P0175: Fuel Trim System Lean/Fuel Trim System Rich >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
  1. Ignition ON.
  2. Verify no other DTCs are set.
    • If no other DTCs are set 
  3. Verify DTC P0171, P0172, P0174, or P0175 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 P0171, P0172, P0174, or P0175 is not set.
    • If any of the DTCs set 

      Refer to Circuit/System Testing.

    • If none of the DTCs set 
  6. All OK.
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