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Home >> GMC >> 2024 >> Sierra EV >> Repair and Diagnosis >> Electrical >> Charging Systems >> Plug-In Charging >> Diagnostic Information and Procedures >> DTC P0EFC-P0EFE >> Circuit/System Verification

Circuit/System Verification

  1. Vehicle in Service Mode.
  2. Verify DTC U019B, U049C is not set
    • Go to next step: If the DTC is not set 
  3. DTC P0EFC-P0EFE is set.
    • If any of the DTCs are set 

      Replace T18 Battery Charger

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