B18BD on the 2019 Audi S4
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.
| A9123872062480_3 | 2023-05-05. Service bulletin. This bulletin advises that DTCs B18BDF0 and B18BEF0 are erroneously stored and should be cleared. |
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| A9122292062480_2 | 2022-10-05. Service bulletin. This bulletin advises that DTCs B18BEF0 and/or B18BDF0 may arise due to a sensitive diagnostic routine; codes can be cleared and no parts require replacement. |
| A9121522054038_3 | 2021-12-07. Service bulletin. This bulletin contains repair instructions for DTCs B18BE13 and B18BD13 with an SOS malfunction message. |
3 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.