Service bulletin A341835 2051686-

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)
Type	Service bulletin
NHTSA id	10144635
Published by NHTSA	2018-09-17
Manufacturer's number	A341835 2051686-
Manufacturer's date	2018-06-29
NHTSA component	POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); EQUIPMENT

NHTSA's summary

This bulletin contains repair instructions for when DTC P280500 is stored in the TCM with symptom code 20779. The engine does not start and a gearbox malfunction message is displayed.

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

Equipment and accessories, Transmission and driveline, Automatic transmission, Transmission control module

Trouble codes named

P2805

Vehicles listed
AUDI A6	2016, 2017

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
A3423632070167_1	2023-06-06. Service bulletin. This bulletin provides instructions for when DTC P1A5B00 is stored after replacing the transmission control module or valve body for another concern.
A3720012039650_2	2020-08-06. Service bulletin. This bulletin contains instructions for addressing a leak from the transmission oil pan gasket or transfer case.
A341836 2050215-	2018-10-15. Service bulletin. This bulletin contains repair instructions for when an oil leak is present around the ATF sump.
A341834 2051575-	2018-09-17. Service bulletin. This bulletin contains repair instructions when there is a squeaking noise from the MTF pump.
A341829 2050215_	2018-04-16. Service bulletin. This bulletin contains repair instructions for when an oil leak is present around the ATF sump.
A011527 2041093-	2017-10-25. Service bulletin. DTC P164D00 is stored in the engine control module. The red oil pressure warning light may be on. Rubber oil drain plug within the oil filter housing is out of position.
A371555 2039650-	2017-10-25. Service bulletin. There is an oil leak from underneath the vehicle. The leak may appear to be from the transmission oil pan gasket. Although the leak may appear to be from the transmission oil pan gasket, there are multiple possible sources for the leak. The leak must be diagnosed to determine the actual location before any repairs are attempted.