{"nhtsa_id":10173944,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2020-04-20","date":"2020-03-11","document_id":"TSB200059-031120","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"This Technical Service Bulletin describes the verification and resolution of multiple J1939 aftertreatment component fault codes at first engine start of the day after engine cold soak. Aftertreatment power supply relay is found to have malfunctioned, causing high resistance in the relay, and in return, low power to the aftertreatment.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10173944-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10173944-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10173944","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":[]}],"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":[]}