{"nhtsa_id":10175999,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2020-06-05","date":"2020-05-18","document_id":"20U12","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:ENGINE:DIESEL","mfr_system":null,"summary":"Some of the affected vehicles may have a valve seat that is below the required retention force or not fully seated into one of the cylinder heads. A valve seat that is out of position may cause the illumination of the check engine light and may lead eventually to engine damage and potentially resulting in engine failure.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10175999-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10175999-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10175999","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"FORD","model":"F-250 SD","year_from":2020,"year_to":2020,"match":"base","vehicle_ids":["2020_ford_f-250"]},{"make":"FORD","model":"F-350 SD","year_from":2020,"year_to":2020,"match":"base","vehicle_ids":["2020_ford_f-350"]},{"make":"FORD","model":"F-450 SD","year_from":2020,"year_to":2020,"match":"base","vehicle_ids":["2020_ford_f-450"]},{"make":"FORD","model":"F-550 SD","year_from":2020,"year_to":2020,"match":"base","vehicle_ids":["2020_ford_f-550"]}],"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":[]}