Audi A5 2025–2026 — technical service bulletin
Bulletin TSB_2080446_1 · NHTSA communication 11027384 · issued Dec 12, 2025
Technical service bulletin
communication type
Engine
component
2025–2026
model years
6
vehicle entries
Official summary
This bulletin provides information when the exhaust emissions warning lamp lights up in the instrument cluster; DTC PC01C400 (sumptom 46314, 46312).
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.