LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2018 >> Impala Premier, Gas >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (Engine Controls And Fuel - 2.5L (LCV) - Diagnostic Information And Procedures (P0010-P0336)) >> Diagnostic Information and Procedures >> DTC P0171 or P0172 >> 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.
    • Go to next step: If no other DTCs are set 
  3. Verify DTC P0171 or P0172 is not set.
    • If a DTC is set 

      Refer to Circuit/System Testing.

    • 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 or P0172 is not set.
    • If any of the DTCs set 

      Refer to Circuit/System Testing.

    • Go to next step: If none of the DTCs set 
  6. All OK.
scientia non olet · About LEMON Manuals