Jeep Grand Wagoneer 2024 — technical service bulletin
Bulletin 21-030-25 · NHTSA communication 11017021 · issued Apr 9, 2025
Technical service bulletin
communication type
Power Train
component
2024
model years
2
vehicle entries
Official summary
"Flash: Transmission Control Module(TCM) Updates Customers may experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle may exhibit/set the following Diagnostic Trouble Code (DTC): ● P0607-00 - ECU Internal Performance. Customers may also experience the following: ● Blinking shifter and the inability to shift out of Park, or a no crank con 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.