RAM 2500 2021 — technical service bulletin
Bulletin 1801723 · NHTSA communication 10248003 · issued Feb 7, 2023
Technical service bulletin
communication type
Electrical System
component
2021
model years
4
vehicle entries
Official summary
Flash: Powertrain Control Module (PCM) Updates Customer or technician may experience the following: ? High frequency exhaust noise at idle after cold start. ? Power Take Off (PTO) disable to high engine oil temperature. ? Multiple Displacement System (MDS) transition causing a transmission clunk noise under light throttle when coasting in fourth gear. This bulletin involves reprogramming the PCM 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.