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RecallGazette

Vehicle problems, recalls & safety intelligence

RAM 2500 2013–2024technical service bulletin

Bulletin S1625000002 REV.B · NHTSA communication 11015599 · issued Mar 10, 2025

Technical service bulletin
communication type
Unknown OR Other
component
2013–2024
model years
48
vehicle entries

Official summary

Malfunction Indicator Lamp (MIL) Illumination, Diagnostic Trouble Codes (DTCs) P21C4 – (Diesel Exhaust Fluid) Reductant Line Heater Control Circuit High, and U11C1 – Reductant Control Module Received Implausible Data From ECM/PCM, Set

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.