{"vehicle":{"id":"2003_honda_civic","year":2003,"make":"Honda","model":"Civic"},"code":"P0420","generic":true,"description":null,"bulletins":{"as_of":"2026-10-19","count":4,"bulletins":[{"nhtsa_id":10018082,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2005-12-15","date":"2004-12-16","document_id":"1204","mfr_campaign":null,"component":"ENGINE AND ENGINE COOLING","summary":"DIAGNOSTIC TROUBLE CODE P0420 AND P1420 REPAIRS. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/10018082"},{"nhtsa_id":10017632,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2005-11-15","date":"2005-08-13","document_id":"05028","mfr_campaign":null,"component":"ELECTRICAL SYSTEM","summary":"PRODUCT UPDATE: ECM UPDATE TO PREVENT CATALYST DTC P0420 AND/OR VPS DTC P1021, MCM UPDATE TO CURRENT SPECIFICATIONS. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/10017632"},{"nhtsa_id":10014733,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2005-05-09","date":"2005-01-01","document_id":"01012005","mfr_campaign":null,"component":"POWER TRAIN:AUTOMATIC TRANSMISSION","summary":"REPLACE THE CORRECT THREE WAY CATALYTIC CONVERTER FOR DTC P0420 P01420 P2000. *EH","document":null,"url":"https://open.wenmarpro.com/bulletins/10014733"},{"nhtsa_id":10011763,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2005-02-01","date":"2004-11-30","document_id":"113004","mfr_campaign":null,"component":"ENGINE AND ENGINE COOLING:ENGINE","summary":"DIAGNOSTIC TROUBLE CODE P0420 AND DATA RECORDER INSTALLATION. INVESTIGATION OF 2001-2003 CIVICS WITH THE MALFUNCTION INDICATOR LIGHT (MIL) ON AND DIAGNOSTIC TROUBLE CODE (DTC) P0420 STORED. *NM","document":null,"url":"https://open.wenmarpro.com/bulletins/10011763"}],"url":"https://open.wenmarpro.com/makes/honda/civic/2003/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/2003/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."]}