WenmarOpen by Wenmar Pro

Service bulletin Dealer 24HM

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 id10202639
Published by NHTSA2021-11-05
Manufacturer's numberDealer 24HM
Manufacturer's date2021-10-25
NHTSA componentENGINE AND ENGINE COOLING:COOLING SYSTEM; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL

NHTSA's summary

Affected Engine Control Software does not disable the warm-up correction factor following engine start and warm-up as described in Auxiliary Emission Control Device (AECD) documentation.

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, Exhaust and emissions, Cooling system, Engine control module

Vehicles listed
AUDI SQ72020
AUDI SQ82020

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
A9724072073305_12024-04-04. Service bulletin. This bulletins provides information when the radiator fans, alarm, or wipers are not working; DTC P048000, _048100, U063200, U063300, U10F300, U10A400, P10EF00.
A2024672073032_12024-04-04. Service bulletin. This bulletin provides information for when the MIL is on, DTC P148D00 and P044200; leak diagnostic pump.
A1924522065040_42024-03-06. Service bulletin. This bulletin provides information when the coolant warning light is on or when the coolant pump is replaced due to a coolant leak.
A1324232060876_22024-03-06. Service bulletin. This bulletin provides information for when the MIL is illuminated; DTC P030000 is stored in the ECM, and corrosion marks are on the cylinder walls.
A2723602067906_32023-10-05. Service bulletin. This bulletin provides information for when DTC P0A7D00 is stored.
A1923422069248_42023-10-05. Service bulletin. This bulletin provides information for when the red coolant warning light or the MIL is illuminated, DTC P218100 and/or P1BB400.
A1923412062951_32023-10-05. Service bulletin. This bulletin provides information for when the red coolant warning lamp is on and the DTCs P218100, P017B00, P017C00, and/or P017E00 are stored in the ECM.
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.
A1922302065040_22022-09-01. Service bulletin. This bulletin advises to ensure that full diagnosis is completed on supporting systems prior to replacing the coolant pump.
A2722412058831_42022-04-05. Service bulletin. This bulletin contains a software update for DTC P0CA700 or U046900.