{"vehicle":{"id":"2010_honda_accord","year":2010,"make":"Honda","model":"Accord"},"code":"P0420","generic":true,"description":null,"bulletins":{"as_of":"2026-10-19","count":14,"bulletins":[{"nhtsa_id":10129824,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-03-12","date":"2014-02-13","document_id":"Service Bulletin","mfr_campaign":null,"component":"ELECTRICAL SYSTEM","summary":"Service bulletin - The MIL is on with DTC P0420 or DTC P0430 (catalyst system efficiency below threshold) with a possible DTC P2243 or DTC P2247 (A/F sensor 1 circuit high voltage). One or both primary A/F Sensor (Air Fuel Ratio) caps may have fallen off and bored a hole through the affected WU-TWC (Warm Up Three Way Catalyst).","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10129824-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10129824-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10129824"},{"nhtsa_id":10129520,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-03-05","date":"2014-02-27","document_id":"DLR MSG - RFP -","mfr_campaign":null,"component":"ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR","summary":"Dealer message - American Honda (AHM) is investigating certain 2010 CR-Vs & Accord L4s with a complaint of the Malfunction Indicator Lamp (MIL) on with the DTC P0420 (Catalyst System Efficiency Below Threshold) stored. To fully understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting any further repair of any kind.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10129520-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10129520-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10129520"},{"nhtsa_id":10129501,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-03-05","date":"2014-03-13","document_id":"DLR MSG - RFP -","mfr_campaign":null,"component":"EQUIPMENT:ELECTRICAL","summary":"Dealer message - American Honda (AHM) is investigating certain 2010 CR-Vs & Accord L4s with a complaint of the Malfunction Indicator Lamp (MIL) on with the DTC P0420 (Catalyst System Efficiency Below Threshold) stored. To fully understand the cause of this condition, AHM would like to either inspect or collect specific parts from the vehicle prior to you attempting any further repair of any kind.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10129501-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10129501-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10129501"},{"nhtsa_id":10129479,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-03-05","date":"2014-03-31","document_id":"DLR MSG - RFV, R","mfr_campaign":null,"component":"EXTERIOR LIGHTING","summary":"Dealer message - American Honda (AHM)is investigating certain 2010 CR-Vs & Accord L4s with a complaint of the Malfunction Indicator Lamp (MIL)on with the DTC P0420 (Catalyst System Efficiency Below Threshold)stored. To fully understand the cause of this condition, AHM would like to either inspect or collect specific parts from the vehicle prior to you attempting any further repair of any kind.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10129479-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10129479-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10129479"},{"nhtsa_id":10129441,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-03-05","date":"2014-05-05","document_id":"ENG REQ - AER140","mfr_campaign":null,"component":"EXTERIOR LIGHTING","summary":"Engineering request for investigation - American Honda (AHM) is investigating certain 2010 CR-Vs & Accord L4 with a complaint of the Malfunction Indicator Lamp (MIL) on with the DTC P0420 (Catalyst System Efficiency Below Threshold) stored. To fully understand the cause of this condition, AHM would like to either inspect or collect specific parts from the vehicle prior to you attempting any further repair of any kind.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10129441-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10129441-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10129441"},{"nhtsa_id":10129439,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-03-05","date":"2014-05-05","document_id":"DLR MSG - RFV RF","mfr_campaign":null,"component":"EXTERIOR LIGHTING","summary":"Dealer message - American Honda (AHM) is investigating certain 2010 CR-Vs & Accord L4s with a complaint of the Malfunction Indicator Lamp (MIL) on with the DTC P0420 (Catalyst System Efficiency Below Threshold) stored. To fully understand the cause of this condition, AHM would like to inspect vehicle prior to you attempting any further repair of any kind.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10129439-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10129439-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10129439"},{"nhtsa_id":10129322,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-02-26","date":"2014-05-29","document_id":"ENG REQ - AER140","mfr_campaign":null,"component":"ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR","summary":"Engineering request for investigation - American Honda (AHM) is investigating certain 2010 CR-Vs & Accord L4 with a complaint of the Malfunction Indicator Lamp (MIL) on with the DTC P0420 (Catalyst System Efficiency Below Threshold) stored. To fully understand the cause of this condition, AHM would like to either inspect or collect specific parts from the vehicle prior to you attempting any further repair of any kind.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10129322-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10129322-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10129322"},{"nhtsa_id":10129303,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-02-26","date":"2014-06-05","document_id":"DLR MSG - RFV, R","mfr_campaign":null,"component":"ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR","summary":"Dealer message - American Honda (AHM) is investigating certain 2010 CR-Vs & Accord L4 with a complaint of the Malfunction Indicator Lamp (MIL) on with the DTC P0420 (Catalyst System Efficiency Below Threshold) stored. To fully understand the cause of this condition, AHM would like to either inspect or collect specific parts from the vehicle prior to you attempting any further repair of any kind.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10129303-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10129303-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10129303"},{"nhtsa_id":10129274,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-02-26","date":"2014-06-19","document_id":"DLR MSG - RFV, R","mfr_campaign":null,"component":"ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR","summary":"Dealer message - American Honda (AHM) is investigating certain 2010 CR-Vs & Accord L4 with a complaint of the Malfunction Indicator Lamp (MIL) on with the DTC P0420 (Catalyst System Efficiency Below Threshold) stored. To fully understand the cause of this condition, AHM would like to either inspect or collect specific parts from the vehicle prior to you attempting any further repair of any kind.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10129274-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10129274-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10129274"},{"nhtsa_id":10128868,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-02-21","date":"2014-07-07","document_id":"DLR MSG - RFV, R","mfr_campaign":null,"component":"ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR","summary":"Dealer message - American Honda (AHM)is investigating certain 2010 CR-Vs & Accord L4 with a complaint of the Malfunction Indicator Lamp (MIL)on with the DTC P0420 (Catalyst System Efficiency Below Threshold)stored. To fully understand the cause of this condition, AHM would like to either inspect or collect specific parts from the vehicle prior to you attempting any further repair of any kind.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10128868-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10128868-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10128868"}],"url":"https://open.wenmarpro.com/makes/honda/accord/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/honda/accord/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."]}