{"nhtsa_id":11014552,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2025-02-26","date":"2025-02-13","document_id":"SC335_TSB","mfr_campaign":"SC335","replaces":null,"component":"ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM","mfr_system":null,"summary":"TECHNICAL SERVICE BULLETIN: VOLUNTARY SERVICE CAMPAIGN: BMS S/W LOGIC IMPROVEMENT FOR DTC P1BB2 (SC335) - This bulletin provides information to upgrade the Battery Management System ‘BMS’ software logic on certain 2023-2024MY Sportage HEV (NQ5 HEV) vehicles produced from February 15, 2022 to October 28, 2023, and 2023-2024MY Niro HEV (SG2 HEV) vehicles produced from June 21, 2022 through February 6, 2023. Due to a software issue, the Battery Management System (BMS) may inadvertently overcharge the 12V Lithium battery. If the 12V Lithium battery becomes overcharged, the subject vehicles may experience a reduction in motive power accompanied by the ‘Check Hybrid System, Stop Safely’ warning message, Hybrid system warning lamp, Service warning lamp, Charging system warning lamp, and a rapid beeping sound for approximately ten (10) seconds. (Note: This Voluntary Service Campaign supersedes ELE318/SA553).","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11014552-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11014552-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11014552","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"fuel-system","name":"Fuel system","parent":null}],"codes":["P1BB2"],"topics":[],"vehicles":[{"make":"KIA","model":"NIRO","year_from":2023,"year_to":2024,"match":"exact","vehicle_ids":["2023_kia_niro","2024_kia_niro"]},{"make":"KIA","model":"SPORTAGE HYBRID","year_from":2023,"year_to":2024,"match":"base","vehicle_ids":["2023_kia_sportage","2024_kia_sportage"]}],"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":[]}