{"nhtsa_id":11031666,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-04-29","date":"2026-04-21","document_id":"08-171-26","mfr_campaign":null,"replaces":null,"component":"UNKNOWN OR OTHER","mfr_system":null,"summary":"Loss Of Cabin Heating Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● U0615 - Lost Communication With Engine Coolant Bypass Valve \"A\". ● U11E9 - Lost Communication With AGS. Customer may also comment on the following: ● Loss of cabin heating This bulletin involves applying grease to the 3 way valves wire harness connector or, if necessary, the replacement of both the wire harness and the 3 way valve","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11031666-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11031666-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11031666","components":[],"codes":["U0615","U11E9"],"topics":[],"vehicles":[{"make":"RAM","model":"2500","year_from":2025,"year_to":2026,"match":"exact","vehicle_ids":["2025_ram_2500","2026_ram_2500"]},{"make":"RAM","model":"3500","year_from":2025,"year_to":2026,"match":"exact","vehicle_ids":["2025_ram_3500","2026_ram_3500"]},{"make":"RAM","model":"4500","year_from":2025,"year_to":2026,"match":"exact","vehicle_ids":["2025_ram_4500","2026_ram_4500"]},{"make":"RAM","model":"5500","year_from":2025,"year_to":2026,"match":"exact","vehicle_ids":["2025_ram_5500","2026_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":[]}