{"nhtsa_id":11028668,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-02-10","date":"2026-02-05","document_id":"26-EM-005H TSB","mfr_campaign":null,"replaces":null,"component":"ENGINE","mfr_system":null,"summary":"Some Santa Fe (TMA) vehicles may have DTCs P218100, P2181F0, and/or P2181F1 (Cooling System Performance) set in the Electronic Control Unit (ECU), resulting in an illuminated Check Engine warning lamp. Follow the procedure in this TSB to replace the Integrated Thermal Management (ITM) module and update both the Engine Control Module (ECM) and Transmission Control Module (TCM) if applicable. Follow the flowchart in this TSB to update the appropriate modules.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11028668-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11028668-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11028668","components":[{"id":"engine","name":"Engine","parent":null}],"codes":["P2181"],"topics":[],"vehicles":[{"make":"HYUNDAI","model":"SANTA FE","year_from":2021,"year_to":2023,"match":"exact","vehicle_ids":["2021_hyundai_santa-fe","2022_hyundai_santa-fe","2023_hyundai_santa-fe"]}],"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":[]}