RAM 3500 2025 — technical service bulletin
Bulletin 08-253-25 · NHTSA communication 11021828 · issued Aug 7, 2025
Technical service bulletin
communication type
Electrical System
component
2025
model years
1
vehicle entries
Official summary
Flash: Radio Frequency Hub Module (RFHM) Updates Technicians may experience the following Diagnostic Trouble Code (DTC): ● B22A9-00 - ECU Internal Performance. NOTE: This DTC will be Active and there are no customer symptoms with this DTC. *This bulletin involves inspecting and possibly updating the RFHM with the latest available software and also possibly replacing the RFHM.
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.