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U1121 on the 2025 Audi Q5

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.

Bulletins for this model year that name U1121
TSB_2082083_22026-09-04. Service bulletin. This bulletin provides information when DTC P00000 / U112100 is stored in diagnostic address 0009.
TSB_2082083_12026-06-04. Service bulletin. This bulletin provides information when DTC P00000 / U112100 is stored in diagnostic address 0009.
A4324892059363_62024-06-25. Service bulletin. This bulletin provides information pertaining to an air suspension malfunction warning in the cluster. DTC C1260F0, U112100.
A4324892059363_62024-06-25. Service bulletin. This bulletin provides information pertaining to an air suspension malfunction warning in the cluster. DTC C1260F0, U112100.

4 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.