{"vehicle":{"id":"1999_honda_civic","year":1999,"make":"Honda","model":"Civic"},"code":"P0420","generic":true,"description":null,"bulletins":{"as_of":"2026-10-19","count":3,"bulletins":[{"nhtsa_id":10017639,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2005-11-15","date":"2005-06-10","document_id":"05027","mfr_campaign":null,"component":"ENGINE AND ENGINE COOLING:ENGINE","summary":"MALFUNCTION INDICATOR LAMP ON WITH DIAGNOSTIC TROUBLE CODE P0420 OR ENGINE PING UNDER LOAD. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/10017639"},{"nhtsa_id":10009189,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2004-09-16","date":"2004-08-25","document_id":"08252004","mfr_campaign":null,"component":"ELECTRICAL SYSTEM:STARTER ASSEMBLY","summary":"(COMPLETE) DISTRIBUTOR ASSEMBLY. HESITATION, PINGING AND/OR REPEAT DIAGNOSTIC TROUBLE CODE P0420 (CATALYST) PROBLEMS. REQUEST FOR PARTS. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/10009189"},{"nhtsa_id":627496,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2002-02-08","date":"2001-10-01","document_id":"011001","mfr_campaign":null,"component":"ELECTRICAL SYSTEM:IGNITION:MODULE","summary":"SUBJECT REGARDING DIAGNOSTIC TROUBLE CODE P9999 PROBABLY BEING DIAGNOSTIC TROUBLE CODE P0420. *SLC","document":null,"url":"https://open.wenmarpro.com/bulletins/627496"}],"url":"https://open.wenmarpro.com/makes/honda/civic/1999/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/honda/civic/1999/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."]}