Toyota Prius 2016–2019 — technical service bulletin
Bulletin T-SB-0135-19 · NHTSA communication 10166037 · issued Sep 26, 2019
Technical service bulletin
communication type
Engine and Engine Cooling
component
2016–2019
model years
5
vehicle entries
Official summary
TSB: Some 2016 ? 2019 model year Prius and 2017 ? 2019 model year Prius Prime vehicles may exhibit one or more of the following conditions due to a coolant leakage at the front exhaust pipe heat exchanger: ? Low coolant level ? MIL ON accompanied by Diagnostic Trouble Code (DTC) P148F00 ? Poor heater performance The front exhaust pipe with heat exchanger assembly has been updated. Follow the Repair Procedure in this bulletin to address this condition.
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.