{"nhtsa_id":10209027,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-03-15","date":"2022-03-11","document_id":"SSM 50578","mfr_campaign":null,"replaces":null,"component":"EQUIPMENT; ENGINE AND ENGINE COOLING; EQUIPMENT ADAPTIVE/MOBILITY","mfr_system":null,"summary":"Some 2020-2021 Mustang GT500 vehicles may exhibit a lack of power and/or an illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P1228. This may be due to the one-way clutch on the supercharger drive assembly. With the supercharger belt removed, a failed one-way clutch within the pulley rotates freely in both directions. The supercharger drive assembly KR3Z-6J022-B is now available as a lower level service part, separate from the supercharger assembly. Refer to the parts catalog and Workshop Manual (WSM), Section 303-12D for installation.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10209027-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10209027-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10209027","components":[{"id":"engine","name":"Engine","parent":null},{"id":"equipment","name":"Equipment and accessories","parent":null}],"codes":["P1228"],"topics":[],"vehicles":[{"make":"FORD","model":"MUSTANG","year_from":2020,"year_to":2021,"match":"exact","vehicle_ids":["2020_ford_mustang","2021_ford_mustang"]}],"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":[]}