Jeep Wrangler 2021 — technical service bulletin
Bulletin 21-015-22 · NHTSA communication 10214604 · issued May 13, 2022
Technical service bulletin
communication type
Equipment Adaptive/mobility
component
2021
model years
1
vehicle entries
Official summary
Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes (DTCs). U0293-00 - Lost Communication With Hybrid Control Module. P0732-00 - Gear 2 Shift Incorrect Ratio. P061B-00 - Internal Control Module Torque Calculation Performance. Other software enhancement::2?1 downshift improvement. Additional module flashes are required for this update to be e
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.