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Service bulletin A0121082052591_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 id10199210
Published by NHTSA2021-08-04
Manufacturer's numberA0121082052591_2
Manufacturer's date2021-07-12
NHTSA componentENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE; EQUIPMENT

NHTSA's summary

This bulletin contains instructions for correcting DTC P045600.

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

P0456

Vehicles listed
AUDI Q52018
AUDI SQ52018

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.
A1922292058767_82022-04-05. Service bulletin. This bulletin contains instructions for DTCs P218100, P017B00, P308100, and P01E400.
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.