B1BF4 on the 2026 Audi S5
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.
This code is specific to a manufacturer and is not described here. Its meaning is in the manufacturer's service information.
| TSB_2082613_1 | 2026-08-05. Service bulletin. This bulletin provides information when DTC B1BF4F3 is stored; control unit for low-voltage power distribution. |
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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.