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Home >> Cadillac >> 2018 >> Escalade Base, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 5 (Engine Controls And Fuel - 6.0L (L96) - DTC P0010 To DTC P0341) >> Diagnostic Information And Procedures >> DTC P0171, P0172, P0174 Or P0175: Fuel Trim System >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2018 Chevrolet Suburban 3500 HD. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON.
  2. Verify no other DTCs are set.
    • Go to next step: 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 below.

    • Go to next step: 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 below.

    • Go to next step: If none of the DTCs set 
  6. All OK.
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