{"vehicle":{"id":"2010_mitsubishi_lancer","year":2010,"make":"Mitsubishi","model":"Lancer"},"code":"P0420","generic":true,"description":null,"bulletins":{"as_of":"2026-10-19","count":1,"bulletins":[{"nhtsa_id":10170690,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2020-01-25","date":"2012-11-13","document_id":"TSB-12-13-005","mfr_campaign":null,"component":"ELECTRICAL SYSTEM:SOFTWARE; ENGINE AND ENGINE COOLING","summary":"Some affected vehicles may display an illuminated MIL with DTC P0420: Warm Up Catalyst Efficiency Below Threshold, recorded in the ECM. An incorrect parameter in the judgment criteria may cause a false MIL (mis-detection of a fault when an abnormal condition is not present). This TSB provides dealers with a procedure to reprogram the ECM with new software to correct the condition.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2012/MC-10170690-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2012/MC-10170690-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10170690"}],"url":"https://open.wenmarpro.com/makes/mitsubishi/lancer/2010/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/mitsubishi/lancer/2010/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."]}