{"nhtsa_id":10151801,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-12-17","date":"2018-11-26","document_id":"TSB180165-112020","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL","mfr_system":null,"summary":"This Technical Service Bulletin describes the verification and resolution of reduced engine power and fault code 6786 as caused by an exhaust aftertreatment backpressure diagnostic found to be out of adjustment resulting in false occurrences of Fault Code 6786.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2018/MC-10151801-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2018/MC-10151801-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10151801","components":[{"id":"engine","name":"Engine","parent":null},{"id":"exhaust-emissions","name":"Exhaust and emissions","parent":null}],"codes":[],"topics":[],"vehicles":[{"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":[]}