Subaru Ascent 2019–2023 — technical service bulletin
Bulletin 16-144-23 · NHTSA communication 10246084 · issued Nov 8, 2023
Technical service bulletin
communication type
Power Train
component
2019–2023
model years
5
vehicle entries
Official summary
This bulletin announces the availability new service procedure developed for the diagnosis of the following DTCs detected by the Transmission Control Module (TCM):
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.