{"nhtsa_id":11030329,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-03-30","date":"2026-03-24","document_id":"26-EM-009H TSB","mfr_campaign":null,"replaces":null,"component":"ENGINE; ELECTRICAL SYSTEM","mfr_system":null,"summary":"Some Sonata (DN8) and Tucson (NX4/NX4A/NX4M) vehicles equipped with the 2.5L Theta III GDI engine may display a warning lamp and store Diagnostic Trouble Code (DTC) P2B59F0, which relates to the Integrated Thermal Management Module (ITM) circuit due to a logic error. This bulletin provides instructions to update the Engine Control Module (ECM) logic to correct this condition.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11030329-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11030329-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11030329","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"engine","name":"Engine","parent":null}],"codes":["P2B59"],"topics":[],"vehicles":[{"make":"HYUNDAI","model":"SONATA","year_from":2024,"year_to":2025,"match":"exact","vehicle_ids":["2024_hyundai_sonata","2025_hyundai_sonata"]},{"make":"HYUNDAI","model":"TUCSON","year_from":2024,"year_to":2025,"match":"exact","vehicle_ids":["2024_hyundai_tucson","2025_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":[]}