{"nhtsa_id":10154972,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2019-03-25","date":"2019-02-18","document_id":"TSB190022-020420","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"This Technical Service Bulletin describes the verification and resolution of refuse trucks at altitude greater than 1220 m [ 4000 ft ] showing fault codes 2639, 1921, and 1922, which are related to high soot load as caused by an incorrect engine control module (ECM) calibration.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2019/MC-10154972-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2019/MC-10154972-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10154972","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CUMMINS","model":"L9","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":[]}