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P17F9 on the 2020 Audi A4

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 P17F9
A3524542064312_72025-01-07. Service bulletin. This bulletin provides information when the Gearbox warning is on, DTC P17F900 is stored in the TCM.
A3524532064312_62024-11-06. Service bulletin. This bulletin provides information when the Gearbox warning is on, DTC P17F900 is stored in the TCM.
A3523472064312_52024-01-04. Service bulletin. This bulletin provides information when the Gearbox warning is on, DTC P17F900 is stored in the TCM.
A3421532064848_12021-11-05. Service bulletin. This bulletin addresses an issue where basic settings cannot be performed as DTC P17F900 is stored in the TCM.

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.