Jeep Wrangler 2021 — technical service bulletin
Bulletin 21-040-24 · NHTSA communication 11001317 · issued May 29, 2024
Technical service bulletin
communication type
Power Train
component
2021
model years
1
vehicle entries
Official summary
"Flash: Transmission Control Module (TCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician must find the following Diagnostic Trouble Code (DTC): ● P0701 - Transmission Control System Range/Performance. This bulletin involves reprogramming the TCM with the latest available software."
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.