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S1625000002 REV.B

Manufacturer communications

Publication date
2025-03-10
Received by NHTSA
2025-03-13
NHTSA record numbers
11015599

Manufacturer summary

Original wording in English

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 manufacturer communications ↗

Reported code forms

P21C4U11C1

Manufacturer wording

Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.

RamP21C4
(Diesel Exhaust Fluid) Reductant Line Heater Control Circuit High,

NHTSA 11015599

RamU11C1
Reductant Control Module Received Implausible Data From ECM/PCM, Set

NHTSA 11015599

Check vehicle applicability

A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.

MakeModelModel year
Ram25002024
Ram25002023
Ram25002022
Ram25002021
Ram25002020
Ram25002019
Ram25002018
Ram25002017
Ram25002016
Ram25002015
Ram25002014
Ram25002013
Ram35002024
Ram35002023
Ram35002022
Ram35002021
Ram35002020
Ram35002019
Ram35002018
Ram35002017
Ram35002016
Ram35002015
Ram35002014
Ram35002013
Ram45002024
Ram45002023
Ram45002022
Ram45002021
Ram45002020
Ram45002019

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