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Home >> Buick >> 2019 >> Regal TourX Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 139 (Engine Controls And Fuel - 3.6L (LGX) - Diagnostic Information And Procedures (P0449-P3436) And Symptoms) >> Diagnostic Information and Procedures >> DTC P1178 or P1179 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2020 Buick Regal and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
  • DTC P1178 and P1179 are informational DTCs.
  • Diagnose all other engine control module DTCs prior to DTC P1178 or P1179.
  1. Verify that no other DTCs are set except for DTC P1178 or P1179.
    • Go to next step: If only DTC P1178 or P1179 is set 
  2. Replace the K111 Fuel Pump Power Control Module.
  3. Verify the DTC does not set while operating the vehicle within the Conditions for Running the DTC.
    • If DTC sets 

      Replace the K20 Engine Control Module.

    • Go to next step: If DTC does not set 
  4. All OK.
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