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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 167 (Engine Controls And Fuel - 3.6L (LGX LF4) - DTC P0650 To DTC P3436 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P129E or P12A8: Fuel Pump >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
  • DTC P129E and P12A8 are informational DTCs.
  • Diagnose all other engine control module DTCs prior to DTC P129E or P12A8.
  1. Verify that no other DTCs are set except for DTC P129E or P12A8.
    • If only DTC P129E or P12A8 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.

    • If DTC does not set 
  4. All OK.
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