Alfa Romeo Giulia 2017–2019 — technical service bulletin
Bulletin S2018000004 · NHTSA communication 10175670 · issued Apr 15, 2020
Technical service bulletin
communication type
Electrical System
component
2017–2019
model years
5
vehicle entries
Official summary
Issue includes a fault code set in the powertrain control module (PCM ) for U04B1-00-Invalid Data Received From Battery Monitor Module after flashing PCM for Customer Satisfaction Notification (CSN) W05.
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.