# Service bulletin Circular 24GQ

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: 10198237
- Published by NHTSA: 2021\-07\-02
- Manufacturer's number: Circular 24GQ
- Manufacturer's date: 2021\-06\-22
- NHTSA component: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\); EQUIPMENT

## NHTSA's summary

In the event of a catalytic converter failure, which could negatively impact tailpipe emissions, existing diagnostics may not properly illuminate the malfunction indicator light \(MIL\).

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10198237-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10198237-9999.pdf)

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

## Components

Engine, Equipment and accessories, Engine control module

## Vehicles listed

- 2019 to 2020 AUDI A3
- 2021 AUDI Q3
- 2019 to 2021 AUDI TT

## 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.
- [Dealer 24Wi](/bulletins/10230853.md), 2023-02-07, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\); ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. RECALL \- Engine Control Module \(ECM\) Software
- [A3023322060560\_2](/bulletins/10230614.md), 2023-02-07, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\); STEERING:GEAR BOX \(OTHER THAN RACK AND PINION\). This bulletin provides instructions for when the clutch slips when pulling away, or the gearbox malfunction appears in the instrument cluster, or the vehicle shudders when shifting to odd\-numbered gears with various DTCs stored in the TCM.
- [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.
- [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.
- [Dealer24GJdeac](/bulletins/10200447.md), 2021-09-03, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\):SOFTWARE; ENGINE AND ENGINE COOLING. Audi is providing an Engine Control Module \(ECM\) software update to address elevated tailpipe emissions that were found during vehicle testing. This software will also improve drivability and provide other diagnostic improvements. Deactivation notice.
- [Dealer 24GQ](/bulletins/10198238.md), 2021-07-02, Service bulletin: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\):SOFTWARE. In the event of a catalytic converter failure, which could negatively impact tailpipe emissions, existing diagnostics may not properly illuminate the malfunction indicator light \(MIL\).

JSON: [/v1/bulletins/10198237](/v1/bulletins/10198237)

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