Volkswagen Jetta 2018 — technical service bulletin
Bulletin V011904_2055158 · NHTSA communication 10164154 · issued Aug 26, 2019
Technical service bulletin
communication type
Electrical System
component
2018
model years
1
vehicle entries
Official summary
Current Engine/Motor Control Module (ECM) -J623- software incorrectly identifies main relay fault.
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.