P0B4F on the 2020 Ford Fusion
The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.
Nobody has written a description of this code yet.
| TSB 23-2039 | 2023-03-04. Service bulletin. Some 2019-2020 Fusion plug-in hybrid electric vehicles (PHEV) may exhibit a no start condition with diagnostic trouble codes (DTCs) P0B3B, P0B40, P0B45, P0B4A, P0B4F, P0B54, P0B59, P0B5E, P0B63, P0B68, P0B6D, P0B72, P0B77, and/or P0B7C stored in the battery energy control module (BECM). This may be due to a failure within the high voltage (HV) traction battery. To correct the condition, follow the Service Procedure to replace the HV traction battery. |
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1 on file from NHTSA, as of 2026-10-19. See them in the bulletin list. A bulletin lists model years: read the document for which vehicles it concerns.