{"nhtsa_id":11031416,"type":"service_campaign","type_name":"Service campaign","date_added":"2026-04-22","date":"2026-04-14","document_id":"9C2 OL","mfr_campaign":"9C2","replaces":null,"component":"ENGINE","mfr_system":null,"summary":"Certain 2019 – 2020 model year Santa Fe, 2017 – 2018 model year Santa Fe Sport, 2015 – 2019 model year Sonata, and 2018 – 2021 model year Tucson vehicles may exhibit elevated engine-out emissions. Hyundai is conducting a service campaign to update the Engine Control Module (ECM) Software for vehicles equipped with the (2.4 GDI) Theta II engine to improve engine combustion and fuel trim adaptations.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11031416-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11031416-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11031416","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"HYUNDAI","model":"SANTA FE","year_from":2019,"year_to":2020,"match":"exact","vehicle_ids":["2019_hyundai_santa-fe","2020_hyundai_santa-fe"]},{"make":"HYUNDAI","model":"SANTA FE SPORT","year_from":2017,"year_to":2018,"match":"exact","vehicle_ids":["2017_hyundai_santa-fe-sport","2018_hyundai_santa-fe-sport"]},{"make":"HYUNDAI","model":"SONATA","year_from":2015,"year_to":2019,"match":"exact","vehicle_ids":["2015_hyundai_sonata","2016_hyundai_sonata","2017_hyundai_sonata","2018_hyundai_sonata","2019_hyundai_sonata"]},{"make":"HYUNDAI","model":"TUCSON","year_from":2018,"year_to":2021,"match":"exact","vehicle_ids":["2018_hyundai_tucson","2019_hyundai_tucson","2020_hyundai_tucson","2021_hyundai_tucson"]}],"as_of":"2026-10-19","note":"A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.","attribution":[]}