{"vehicle":{"id":"2008_honda_fit","year":2008,"make":"Honda","model":"Fit"},"code":"P0420","generic":true,"description":null,"bulletins":{"as_of":"2026-10-19","count":1,"bulletins":[{"nhtsa_id":10036966,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2011-04-25","date":"2010-03-23","document_id":"SB-10-015","mfr_campaign":null,"component":"POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ENGINE AND ENGINE COOLING:ENGINE","summary":"HONDA: MIL COMES ON WITH DTC P0420 (CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD) IS STORED. ECM/PCM MISINTERPRETS ENGINE IDLE CONDITIONS, RESULTING IN INACCURATE CONTROL OF THE FUEL AND IGNITION. REPLACE CATALYTIC CONVERTER, AND UPDATE THE PGM-FI SOFTWARE WITH HDS. *PE","document":null,"url":"https://open.wenmarpro.com/bulletins/10036966"}],"url":"https://open.wenmarpro.com/makes/honda/fit/2008/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/fit/2008/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."]}