{"nhtsa_id":10246083,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2023-12-05","date":"2023-11-07","document_id":"09-110-23R","mfr_campaign":null,"replaces":null,"component":"EQUIPMENT; ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"This Service Information Bulletin announces diagnostic service procedures to be followed when DTC P0420 (Catalyst System Efficiency Below Threshold Bank 1) is detected by the Engine Control Module (ECM).","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-10246083-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-10246083-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10246083","components":[{"id":"engine","name":"Engine","parent":null},{"id":"equipment","name":"Equipment and accessories","parent":null}],"codes":["P0420"],"topics":[],"vehicles":[{"make":"SUBARU","model":"ASCENT","year_from":2019,"year_to":2021,"match":"exact","vehicle_ids":["2019_subaru_ascent","2020_subaru_ascent","2021_subaru_ascent"]},{"make":"SUBARU","model":"CROSSTREK","year_from":2017,"year_to":2023,"match":"exact","vehicle_ids":["2017_subaru_crosstrek","2018_subaru_crosstrek","2019_subaru_crosstrek","2020_subaru_crosstrek","2021_subaru_crosstrek","2022_subaru_crosstrek","2023_subaru_crosstrek"]},{"make":"SUBARU","model":"FORESTER","year_from":2017,"year_to":2023,"match":"exact","vehicle_ids":["2017_subaru_forester","2018_subaru_forester","2019_subaru_forester","2020_subaru_forester","2021_subaru_forester","2022_subaru_forester","2023_subaru_forester"]},{"make":"SUBARU","model":"IMPREZA","year_from":2017,"year_to":2023,"match":"exact","vehicle_ids":["2017_subaru_impreza","2018_subaru_impreza","2019_subaru_impreza","2020_subaru_impreza","2021_subaru_impreza","2022_subaru_impreza","2023_subaru_impreza"]},{"make":"SUBARU","model":"LEGACY","year_from":2017,"year_to":2023,"match":"exact","vehicle_ids":["2017_subaru_legacy","2018_subaru_legacy","2019_subaru_legacy","2020_subaru_legacy","2021_subaru_legacy","2022_subaru_legacy","2023_subaru_legacy"]},{"make":"SUBARU","model":"OUTBACK","year_from":2017,"year_to":2023,"match":"exact","vehicle_ids":["2017_subaru_outback","2018_subaru_outback","2019_subaru_outback","2020_subaru_outback","2021_subaru_outback","2022_subaru_outback","2023_subaru_outback"]},{"make":"SUBARU","model":"WRX","year_from":2018,"year_to":2023,"match":"exact","vehicle_ids":["2018_subaru_wrx","2019_subaru_wrx","2020_subaru_wrx","2021_subaru_wrx","2022_subaru_wrx","2023_subaru_wrx"]}],"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":[]}