RAM 1500 2025 — technical service bulletin
Bulletin S2521000002 · NHTSA communication 11019587 · issued Jun 9, 2025
Technical service bulletin
communication type
Electrical System
component
2025
model years
1
vehicle entries
Official summary
Malfunction Indicator Lamp (MIL) Illuminated. Diagnostic Trouble Code (DTC) P1DF3 – ECU Not Initialized, Set.
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.