{"vehicle":{"id":"2019_hyundai_elantra","year":2019,"make":"Hyundai","model":"Elantra"},"code":"P0304","generic":true,"description":null,"bulletins":{"as_of":"2026-10-19","count":1,"bulletins":[{"nhtsa_id":10172215,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2020-03-07","date":"2020-02-13","document_id":"20-01-008H","mfr_campaign":null,"component":"ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM:SOFTWARE","summary":"This bulletin provides information related to the Engine Control Module (ECM) software update for 2018 - 2019MY Elantra (AD/ADA) vehicles equipped with 2.0L engine. This software update includes cylinder imbalance learning logic optimization for Malfunction Indicator Light illumination with DTC P0300/P0301/P0302/P0303/P0304 (Cylinder “X” – misfire detected).","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10172215-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10172215-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10172215"}],"url":"https://open.wenmarpro.com/makes/hyundai/elantra/2019/bulletins?code=P0304"},"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/hyundai/elantra/2019/codes/P0304","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."]}