Freightliner Cascadia 2017–2022 — technical service bulletin
Bulletin SB54-337 · NHTSA communication 10185688 · issued Jan 20, 2021
Technical service bulletin
communication type
Engine and Engine Cooling
component
2017–2022
model years
6
vehicle entries
Official summary
Freightliner Service Bulletin for Coolant Level Sensor Wiring Repair. On New Cascadia vehicles, depending on the tension applied to the harness located at the coolant level sensor and its mounting locations, wiring damage can occur, resulting in one or more of the below listed fault codes.
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.