{"nhtsa_id":11029824,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-03-06","date":"2026-02-05","document_id":"TSB250204","mfr_campaign":null,"replaces":null,"component":"ENGINE","mfr_system":null,"summary":"This Technical Service Bulletin describes the verification and resolution steps for the engine control module calibration which may contain a defect, resulting in an inability to clear fault code 3749 (Aftertreatment 1 Outlet NOx Sensor - Data Not Rational - Drifted High) or 6463 (Aftertreatment 1 Outlet NOx Sensor - Data Not Rational - Drifted Low) after the root cause has been repaired. This is an update to a previously submitted communication.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11029824-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11029824-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11029824","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CUMMINS","model":"B6.7","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]},{"make":"CUMMINS","model":"L9","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]},{"make":"CUMMINS","model":"X12","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]},{"make":"CUMMINS","model":"X15","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":[]}