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November 4, 2021 Service bulletin

Diagnostic assistance for no start or no communication with ECM with DTC U0100 stored.

Volkswagen technical service bulletin TT 01 19 05_4 for 2018-2019 Volkswagen Jetta, 2018-2019 Volkswagen Passat and 2018-2019 Volkswagen Beetle and others.

Bulletin number
TT 01 19 05_4
Component
Engine and engine cooling: engine: engine control module (ecu/ECM): software
Summary
Diagnostic assistance for no start or no communication with ECM with DTC U0100 stored.

Owners of these vehicles have filed 645 complaints in the engine category.

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