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Service bulletin A0121152048402_9

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 id10203686
Published by NHTSA2021-12-07
Manufacturer's numberA0121152048402_9
Manufacturer's date2021-11-22
NHTSA componentEQUIPMENT; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE

NHTSA's summary

This bulletin contains a software update and potential part replacement to address DTCs P05A000 and P25EA00.

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

Engine, Equipment and accessories, Engine control module

Trouble codes named

P05A0, P25EA

Vehicles listed
AUDI Q72017, 2018, 2019

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
A2723602067906_32023-10-05. Service bulletin. This bulletin provides information for when DTC P0A7D00 is stored.
A2023522065287_62023-02-07. Service bulletin. This bulletin provides instructions for when the MIL is on and DTC P044200 and/or P045600 is stored in the ECM.
A2022402065287_22022-02-04. Service bulletin. This bulletin describes the repair procedure to address an internal defect in the EVAP leak detection pump causing false leak detection.
A2021392065287_12022-01-05. Service bulletin. There is an internal defect in the EVAP leak detection pump causing false leak detection.