{"vehicle":{"id":"2023_subaru_wrx","year":2023,"make":"Subaru","model":"WRX"},"code":"P0420","generic":true,"description":null,"bulletins":{"as_of":"2026-10-19","count":1,"bulletins":[{"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,"component":"EQUIPMENT; ENGINE AND ENGINE COOLING","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"}],"url":"https://open.wenmarpro.com/makes/subaru/wrx/2023/bulletins?code=P0420"},"related":{"components":[],"bulletins":[],"recalls":{"may_apply":true,"recalls":[],"lookup":{"nhtsa":"https://www.nhtsa.gov/recalls","tc":"https://wwwapps.tc.gc.ca/Saf-Sec-Sur/7/VRDB-BDRV/search-recherche/menu.aspx?lang=eng","maker":null}}},"url":"https://open.wenmarpro.com/makes/subaru/wrx/2023/codes/P0420","note":"The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.","attribution":["Contains information licensed under the Open Government Licence – Canada."]}