# Service bulletin A0121952054795\_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.

- Type: Service bulletin
- NHTSA id: 10185628
- Published by NHTSA: 2021\-02\-04
- Manufacturer's number: A0121952054795\_2
- Manufacturer's date: 2021\-01\-12
- NHTSA component: EQUIPMENT ADAPTIVE/MOBILITY; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\); EQUIPMENT

## NHTSA's summary

This bulletin contains instructions for a hissing noise, MIL light, and DTC P227900 stored in the ECM.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10185628-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10185628-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine, Equipment and accessories, Engine control module

## Trouble codes named

P2279

## Vehicles listed

- 2020 to 2021 AUDI Q7
- 2019 to 2021 AUDI Q8

## Other bulletins for the same vehicles and component

- [A2723602067906\_3](/bulletins/10242930.md), 2023-10-05, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\). This bulletin provides information for when DTC P0A7D00 is stored.
- [A2723572058831\_9](/bulletins/10238212.md), 2023-07-10, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\); ELECTRICAL SYSTEM. This bulletin provides information for when there is a 48V electrical system warning; DTC P0CA700, U046900 is stored in the starter/generator control module/ECM.
- [A2023522065287\_6](/bulletins/10230589.md), 2023-02-07, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\). This bulletin provides instructions for when the MIL is on and DTC P044200 and/or P045600 is stored in the ECM.
- [A0123382067767\_3](/bulletins/10230587.md), 2023-02-07, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\). This bulletin requests that technicians create a PSS record in the PSS application when various warning lamps and/or poor performance is reported and the DTC P060C00 os stored in the ECM.
- [A2722412058831\_4](/bulletins/10208897.md), 2022-04-05, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\). This bulletin contains a software update for DTC P0CA700 or U046900.
- [A1922292058767\_8](/bulletins/10208895.md), 2022-04-05, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\). This bulletin contains instructions for DTCs P218100, P017B00, P308100, and P01E400.
- [A2022402065287\_2](/bulletins/10206879.md), 2022-02-04, Service bulletin: FUEL SYSTEM, GASOLINE:STORAGE:EVAPORATIVE EMISSIONS:HOSES/VALVES/SENSORS; UNKNOWN OR OTHER; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\). This bulletin describes the repair procedure to address an internal defect in the EVAP leak detection pump causing false leak detection.
- [A2021392065287\_1](/bulletins/10205901.md), 2022-01-05, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\). There is an internal defect in the EVAP leak detection pump causing false leak detection.
- [A9021062061489\_3](/bulletins/10198251.md), 2021-07-02, Service bulletin: EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\). This bulletin states to create a PSS record if the driver assistance systems are sporadically not working.

JSON: [/v1/bulletins/10185628](/v1/bulletins/10185628)

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