RAM
25-008-24
Manufacturer communications
- Publication date
- 2024-11-14
- Received by NHTSA
- 2024-11-18
- NHTSA record numbers
- 11010636
Manufacturer summary
Original wording in English
"Flash: Diesel Exhaust Fluid (DEF) Dosing Control Unit (DCU) Update Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set the following Diagnostic Trouble Code (DTC):
• P21C4-00 - Reductant Line Heater Relay Control Circuit High.
• U11C1-00 - Reductant Control Module Received Implausible Data From ECM/PCM. These DTCs will occur after installation of service DCU 68458603AB. This bulletin involves reprogramming the DCU with the latest available software."
• P21C4-00 - Reductant Line Heater Relay Control Circuit High.
• U11C1-00 - Reductant Control Module Received Implausible Data From ECM/PCM. These DTCs will occur after installation of service DCU 68458603AB. This bulletin involves reprogramming the DCU with the latest available software."
Reported code forms
Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
Ram
P21C4-00Reductant Line Heater Relay Control Circuit HighRam
U11C1-00Reductant Control Module Received Implausible Data From ECM/PCMCheck vehicle applicability
A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.