# Service bulletin Circular 96H5

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: 10187588
- Published by NHTSA: 2021\-03\-04
- Manufacturer's number: Circular 96H5
- Manufacturer's date: 2021\-02\-23
- NHTSA component: ENGINE AND ENGINE COOLING

## NHTSA's summary

In the event of a catalytic converter failure, which could negatively impact tailpipe emissions, existing diagnostics may not properly illuminate the check engine light \(MIL\) due to an error identified with Rear O2 Sensor monitoring. Additionally, under certain conditions it is possible that a diagnostic anomaly may occur during the initial drive cycle when coming to a stop, potentially causing the Start/Stop system to not operate as intended. In such a case the engine may go into limp mode, a condition where the vehicle can still be driven but with restricted RPM, accompanied by illumination of the check engine light \(MIL\).

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10187588-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10187588-9999.pdf)

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

## Components

Engine

## Vehicles listed

- 2019 to 2020 AUDI Q3

## Other bulletins for the same vehicles and component

- [TSB\_2082323\_1](/bulletins/11034728.md), 2026-07-07, Service bulletin: ENGINE. This bulletin provides informaiton when the engine is not running smoothly, misfiring.
- [TSB\_2081573\_2](/bulletins/11034699.md), 2026-07-07, Service bulletin: ENGINE. This bulletin provides informatio when fuel pump/ sender, fuel tank level implausible, DTC B105A1A B103E29 Stored in 0017.
- [TSB\_2074640\_3](/bulletins/11034657.md), 2026-07-07, Service bulletin: ENGINE. This bulletin provides information when there is increased oil consumption; \>0.5ltr/1000 km.
- [TSB\_2073867\_3](/bulletins/11034656.md), 2026-07-07, Service bulletin: ENGINE. This bulletin provides information when DTC U140A00 Terminal 30 is stored in the ECM.
- [TSB\_2081573\_1](/bulletins/11032181.md), 2026-05-05, Service bulletin: ENGINE. This bulletin provides informatio when fuel pump/ sender, fuel tank level implausible, DTC B105A1A B103E29 Stored in 0017.
- [TSB\_2051095\_10](/bulletins/11029368.md), 2026-03-03, Service bulletin: ENGINE. This bulletin provides information on the use of the Audi frequencly analysis app, and where the application can be downloaded.
- [TSB\_2021205\_10](/bulletins/11029367.md), 2026-03-03, Service bulletin: ENGINE. This bulletin provides information on VIN Plates, Safety Certification labels, and the ordering procedures.
- [TSB\_2060750\_5](/bulletins/11028398.md), 2026-02-06, Service bulletin: ENGINE. This bulletin provides information regarding UV leak additive for finding oil leaks.
- [TSB\_2074640\_2](/bulletins/11027356.md), 2026-01-07, Service bulletin: ENGINE. This bulletin provides information when there is increased oil consumption; \>0.5ltr/1000 km.
- [SM 57\-2025](/bulletins/11026170.md), 2025-12-05, Other: ENGINE. This special notice is to inform dealers to return the parts listed and only order the successor parts going forward.

JSON: [/v1/bulletins/10187588](/v1/bulletins/10187588)

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