Toyota Prius 2017–2020 — technical service bulletin
Bulletin T-TT-0576-19 · NHTSA communication 10166039 · issued Sep 26, 2019
Technical service bulletin
communication type
Electrical System
component
2017–2020
model years
4
vehicle entries
Official summary
TT: Some Prius Prime customers may experience a MIL ON condition. Vehicles might be put into a failsafe mode and usage of battery will be discontinued. Technicians find DTC code P0ABF28 stored in the ECU.
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.