{"nhtsa_id":10172439,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2020-03-16","date":"2020-02-21","document_id":"C2119","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM:WIRING; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL","mfr_system":null,"summary":"This field action authorizes certified repair locations to upfit certain ISB CM2350 engines with an improved SCR Catalyst and to update the Engine Control Module (ECM) to the latest calibration revision. For MY2013 thru MY2014 engines that qualify for a new SCR Catalyst, a new wiring harness connector plug and a calibration update will be required.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10172439-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10172439-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10172439","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"engine","name":"Engine","parent":null},{"id":"exhaust-emissions","name":"Exhaust and emissions","parent":null},{"id":"wiring","name":"Wiring and fuses","parent":"electrical"}],"codes":[],"topics":[],"vehicles":[{"make":"CUMMINS","model":"ISB","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":[]}