TSB: Audi EVAP Leak Detection Sensitivity

This bulletin details the EVAP leak detection system issues affecting various Audi models from 2017 to 2023, highlighting the impact of the sensitive GX36 pump calibration on false leak codes and the introduction of an improved calibration in 2022.
Related To: 
Sept. 8, 2026
Add Us On Google
Audi
6a9f96a77b693d0f0f3fa253 Audi

Audi EVAP Leak Detection Sensitivity

This bulletin applies to 2017-2023 Audi Q7, TT, TTS and TT Roadster, 2017-2020 A3, S3 and RS 3, 2017-2019 A3 Cabriolet, 2017-2018 A3 Sportback e-tron, 2018-2022 TT and RS, 2019-2023 A6, A7, A8, Q3 andQ8, 2020-2023 A6 allroad, S6, S7, S8, SQ7, SQ8 and RS Q8, 2020-2021 A8 e-quattro, 2021-2023 RS 6 Avant and RS7, 2021-2022 A7 e-quattro, 2022-2023 Q5 e-quattro, Q5/Q5 e-quattro, Q5 Sportback, SQ5 and SQ5 Sportback vehicles.

The MIL may be on accompanied by DTC P044200 (EVAP small leak) and P045600 (EVAP very small leak). The EVAP leak detector pump (GX36) calibration is too sensitive, causing a false leak detection. An optimized GX36 was introduced in 2022 model years. The optimized GX36 is not backward compatible with previous model years.

Sign up for our eNewsletters
Get the latest news and updates

Related

Sponsored
Sponsored

Voice Your Opinion!

To join the conversation, and become an exclusive member of Vehicle Service Pros, create an account today!