RAM 2500 2019–2024 — technical service bulletin
Bulletin S2008000186 REV.B · NHTSA communication 11012036 · issued Dec 19, 2024
Technical service bulletin
communication type
Engine
component
2019–2024
model years
22
vehicle entries
Official summary
Engine Control Module (ECM) Flash Failure, Diagnostic Trouble Code (DTC) U1601 – ECU Application Software Code 1 Missing Or Corrupted
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.