U0101 on the 2026 Audi A3
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_2074475_4 | 2025-07-08. Service bulletin. This TSB provides information when DTC U010100 is stored; Lost Communication with TCM in diagnostic address 23. |
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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.