{"nhtsa_id":11028667,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-02-10","date":"2026-02-05","document_id":"26-EM-004H TSB","mfr_campaign":null,"replaces":null,"component":"ENGINE","mfr_system":null,"summary":"Some Tucson (NX4, NX4A) vehicles may have DTC P218100, P2181F0, and/or P2181F1 (Cooling System Performance) set in the Electronic Control Unit (ECU), resulting in an illuminated Check Engine warning lamp. This TSB provides instructions 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 bulletin to update the appropriate modules.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11028667-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11028667-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11028667","components":[{"id":"engine","name":"Engine","parent":null}],"codes":["P2181"],"topics":[],"vehicles":[{"make":"HYUNDAI","model":"TUCSON","year_from":2022,"year_to":2023,"match":"exact","vehicle_ids":["2022_hyundai_tucson","2023_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":[]}