Volkswagen GTI 2019–2021 — technical service bulletin
Bulletin Dealer 24FX · NHTSA communication 10189155 · issued Mar 11, 2021
Technical service bulletin
communication type
Engine and Engine Cooling
component
2019–2021
model years
6
vehicle entries
Official 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 an error identified with Rear O2 Sensor monitoring. Additionally, under certain conditions, the engine may stall at low speeds (such as while the vehicle is slowing down or coming to a stop), or when the vehicle is already at a stop with the engine running.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.