{"nhtsa_id":11016060,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2025-03-28","date":"2025-03-28","document_id":"9100508","mfr_campaign":null,"replaces":null,"component":"UNKNOWN OR OTHER","mfr_system":"Reductant Line Heater Relay Control Circuit High, Reductant Control Module","summary":"\"6 CONTROL UNIT, Diesel Exhaust Customer complaints with malfunction light illuminated on 2019 thru 2024 MY DJ / D2 / DD / DP vehicles with 6.7L (ETL / ETM / ETN) built on or before October 15,2024 and exhibiting DTCs P21C4-00 (Reductant Line Heater Relay Control Circuit High) and / or U11C1-00 (Reductant Control Module received implausible Data from ECM / PCM). These DTCs will occur after installation of service DCU 68458603AB. Do not replace parts until after the TSB 25-008-24 is performed. If the DTC(s) continue to set, then follow the Service Diagnostics for the applicable DTC.\"","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11016060-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11016060-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11016060","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":[]}