Freightliner Cascadia 2018–2019 — technical service bulletin
Bulletin TechTalk7309 · NHTSA communication 10186607 · issued Jan 14, 2021
Technical service bulletin
communication type
Engine and Engine Cooling
component
2018–2019
model years
3
vehicle entries
Official summary
TechTalk discussion on Fault Code 520342-17.
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.