RAM 1500 2025 — technical service bulletin
Bulletin 18-042-25 · NHTSA communication 11020625 · issued Jul 2, 2025
Technical service bulletin
communication type
Electrical System
component
2025
model years
1
vehicle entries
Official summary
Flash: Powertrain Control Module (PCM) Updates Customers may experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle may exhibit/set the following Diagnostic Trouble Code (DTC): ● P0300 - Multiple Cylinder Misfire. Customers may experience one of the following: ● Vehicle runs rough on initial cold start only after an overnight or extended soak. 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.