Volkswagen Jetta 2017–2018 — technical service bulletin
Bulletin V0119042055158_2 · NHTSA communication 10172978 · issued Mar 19, 2020
Technical service bulletin
communication type
Unknown OR Other
component
2017–2018
model years
2
vehicle entries
Official summary
Current Engine/Motor Control Module (ECM) -J623- software incorrectly identifies main relay fault. Updated to include additional model year applicability
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.