{"vehicle":{"id":"2001_nissan_frontier","year":2001,"make":"Nissan","model":"Frontier"},"code":"P0420","generic":true,"description":null,"bulletins":{"as_of":"2026-10-19","count":2,"bulletins":[{"nhtsa_id":635804,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2002-10-31","date":"2002-09-05","document_id":"NTB02092","mfr_campaign":null,"component":"UNKNOWN OR OTHER","summary":"THIS BULLETIN PROVIDES INFORMATION ON VEHICLES EXHIBITING A MALFUNCTION INDICATOR LAMP ON WITH DIAGNOSTIC TROUBLE CODE P0420 CATALYST SET. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/635804"},{"nhtsa_id":631337,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2002-05-22","date":"2002-03-25","document_id":"NTB02034","mfr_campaign":null,"component":"UNKNOWN OR OTHER","summary":"SUBJECT REGARDING MALFUNCTION INDICATOR LAMP ILLUMINATED WITH DIAGNOSTIC TROUBLE CODE P0420. *JG","document":null,"url":"https://open.wenmarpro.com/bulletins/631337"}],"url":"https://open.wenmarpro.com/makes/nissan/frontier/2001/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/nissan/frontier/2001/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."]}