{"nhtsa_id":10249698,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2024-02-05","date":"2024-01-10","document_id":"23-01-093H","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"This bulletin provides the procedure to update the Hybrid Control Unit (HCU) and Dual Automatic Temperature Control (DATC) software to help improve coolant flow to the Exhaust Heat Recovery System (EHRS).","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-10249698-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-10249698-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10249698","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"HYUNDAI","model":"SONATA HYBRID","year_from":2020,"year_to":2023,"match":"base","vehicle_ids":["2020_hyundai_sonata","2021_hyundai_sonata","2022_hyundai_sonata","2023_hyundai_sonata"]}],"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":[]}