{"nhtsa_id":11010636,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2024-11-18","date":"2024-11-14","document_id":"25-008-24","mfr_campaign":null,"replaces":null,"component":"UNKNOWN OR OTHER","mfr_system":"Diesel Exhaust Fluid","summary":"\"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.\"","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11010636-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11010636-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11010636","components":[],"codes":["P21C4","U11C1"],"topics":[],"vehicles":[{"make":"RAM","model":"2500","year_from":2019,"year_to":2024,"match":"exact","vehicle_ids":["2019_ram_2500","2020_ram_2500","2021_ram_2500","2022_ram_2500","2023_ram_2500","2024_ram_2500"]},{"make":"RAM","model":"3500","year_from":2019,"year_to":2024,"match":"exact","vehicle_ids":["2019_ram_3500","2020_ram_3500","2021_ram_3500","2022_ram_3500","2023_ram_3500","2024_ram_3500"]},{"make":"RAM","model":"4500","year_from":2019,"year_to":2024,"match":"exact","vehicle_ids":["2019_ram_4500","2020_ram_4500","2021_ram_4500","2022_ram_4500","2023_ram_4500","2024_ram_4500"]},{"make":"RAM","model":"5500","year_from":2019,"year_to":2024,"match":"exact","vehicle_ids":["2019_ram_5500","2020_ram_5500","2021_ram_5500","2022_ram_5500","2023_ram_5500","2024_ram_5500"]}],"as_of":"2026-10-19","note":"A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.","attribution":[]}