{"nhtsa_id":10170445,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2020-01-21","date":"2019-12-13","document_id":"T2084D","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"This Temporary Repair Practice authorizes certified repair locations to upfit certain ISB and ISL CM2350 engines with an improved Selective Catalytic Reduction (SCR) Catalyst. MY2013 thru MY2014 engines that qualify, a new wiring harness and calibration update is required. The engine must show open for this field action, experience a complaint or symptom in which troubleshooting results in the replacement of the SCR, and the SCR part number must match the Affected Part Number list. This is an update to a previously submitted communication.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2019/MC-10170445-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2019/MC-10170445-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10170445","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CUMMINS","model":"ISB","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]},{"make":"CUMMINS","model":"ISL","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":[]}