TSB S1625000002 — Ram Service bulletin
S1625000002 is a service bulletin on file with NHTSA for 2 Ram models, 2013–2017 model years. A TSB is factory repair guidance, not a recall — the repair is not automatically free.
What the bulletin says. 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
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Vehicles and model years S1625000002 names
Every document filed under S1625000002
| Document ID | Filed | Type |
|---|---|---|
| S1625000002 REV.B | March 10, 2025 | Service bulletin |
Questions buyers ask
What is TSB S1625000002?
S1625000002 is a service bulletin filed with NHTSA by Ram, covering 2 Ram models across the 2013–2017 model years. NHTSA's summary reads: 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
Which vehicles does S1625000002 cover?
NHTSA's file names Ram 2500 (2013–2017); Ram 3500 (2013–2017). A bulletin number can be re-issued against more vehicles later, so check the model-year list on this page against your own.
Is TSB S1625000002 a recall, and is the repair free?
No. S1625000002 is repair guidance the manufacturer sent its dealers, not a safety defect finding. You pay for the work unless the vehicle is still under warranty. Recall repairs, by contrast, are always free.
How do I get the full text of S1625000002?
Take the document ID to a dealer's service desk, or search NHTSA's manufacturer-communications records. This page carries every document ID filed under S1625000002, its date, and NHTSA's own summary from the public file.
Every number on this page is a count of records in the federal complaint, recall, and investigation files published by NHTSA's Office of Defects Investigation. This page lists only what NHTSA's manufacturer-communications file records under S1625000002. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.