{"vehicle":{"id":"2025_cadillac_xt4","year":2025,"make":"Cadillac","model":"XT4"},"code":"P0420","generic":true,"description":null,"bulletins":{"as_of":"2026-10-19","count":1,"bulletins":[{"nhtsa_id":11018656,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2025-05-29","date":"2025-05-22","document_id":"PIP6067","mfr_campaign":null,"component":"UNKNOWN OR OTHER","summary":"This Preliminary information communicates to the technician to replace the catalytic converter, pre and post oxygens sensor as an assembly. Engineering is collecting parts to determine the cause of the P0420.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11018656-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11018656-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11018656"}],"url":"https://open.wenmarpro.com/makes/cadillac/xt4/2025/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/cadillac/xt4/2025/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."]}