{"nhtsa_id":10224779,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-10-25","date":"2022-10-21","document_id":"SSM 51141","mfr_campaign":null,"replaces":null,"component":"EQUIPMENT:APPLIANCE:TV/RADIO/SPEAKERS; ELECTRICAL SYSTEM","mfr_system":null,"summary":"Some 2021-2022 F-150 vehicles equipped with the branded B and O audio the rear speaker audio may appear to have reduced sound. Fading audio volume to the rear speakers/reduced audio volume from rear speakers is an operating characteristic of the B and O audio system. If the audio control module (ACM) and digital signal processing (DSP) module passes the Self-Test and Network Test without any diagnostic trouble codes (DTCs) setting as hard faults, no further diagnostics is recommended.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10224779-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10224779-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10224779","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"equipment","name":"Equipment and accessories","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"FORD","model":"F-150","year_from":2021,"year_to":2022,"match":"exact","vehicle_ids":["2021_ford_f-150","2022_ford_f-150"]}],"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":[]}