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Service bulletin TSB_2077475_2

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id11033484
Published by NHTSA2026-06-04
Manufacturer's numberTSB_2077475_2
Manufacturer's date2026-05-08
NHTSA componentPOWER TRAIN

NHTSA's summary

This TSB provides information when the gearbox warning light is on; event memory entry P0174A00/P174E00.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Transmission and driveline

Trouble codes named

P174E

Vehicles listed
AUDI A32017, 2018, 2019, 2020
AUDI A32022, 2023, 2024, 2025, 2026
AUDI A3 CABRIOLET2017 to 2019
AUDI Q32026
AUDI S32018, 2019, 2020
AUDI S32022, 2023, 2024, 2025, 2026
AUDI TT2019, 2020, 2021, 2022, 2023
AUDI TT ROADSTER2019 to 2023
AUDI TTS2019, 2020, 2021, 2022, 2023

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
TSB_2074808_42026-06-04. Service bulletin. The high-voltage batteries in electric vehicles are subject to various ageing effects which could lead to the energy content (energy density) being reduced. This reduction in the energy content, which is due to factors. Revised header. Added Model years
TSB_2074764_22026-02-06. Service bulletin. This bulletin provides information when there are whining noises during deceleration in overrun between 70-50 mph.
TSB_2067365_32026-02-06. Service bulletin. This bulletin provides information when there is an oil leak near the transmission cooler.
TSB_2074808_32026-01-07. Service bulletin. This bulletin provides additoinal information to assist in determining the energy content of lithium-ion high-voltage batteries.
TSB_2050723_82025-11-08. Service bulletin. This bulletin provides information when there is a gearbox malfunction warning; DTC P0C2900 in the TCM.
TSB_2060560_42025-08-05. Service bulletin. This bulletin providesi nformation when various DTCs are stored; high maximum temperature recorded for clutch K1.
TSB_2077475_12025-05-03. Service bulletin. This TSB provides information when the earbox warning light is on; event memory entry P0174A00/P174E00.
TSB_2050723_72025-04-04. Service bulletin. This bulletin provides information when there is a gearbox malfunction warning; DTC P0C2900 in the TCM.
TSB-2074475_32025-03-19. Service bulletin. This bulletin provides information when DTC U010100 , Lost Communication with TCM in diagnostic address 23 occurs.
A4025862061464_92025-02-05. Service bulletin. This bulletin provides information when a cracking noise can be heard from the vehicle front or rear end while changing direction.