{"nhtsa_id":10204420,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-12-13","date":"2021-10-21","document_id":"T2490","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM","mfr_system":null,"summary":"This Temporary Repair Practice is being issued to address certain Daimler (Freightliner, Thomas Built Bus, Western Star) vehicles with DEF header sensor failures in which DEF header replacement parts are not available. Due to DEF header part shortages, an ECM calibration is being released that reduces inducement levels until DEF header parts become available for a final repair. This is an update to a previously submitted communication.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10204420-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10204420-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10204420","components":[{"id":"electrical","name":"Electrical system","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CUMMINS","model":"ISX","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]}],"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":[]}