{"nhtsa_id":11022364,"type":"emissions","type_name":"Emissions","date_added":"2025-09-03","date":"2025-08-15","document_id":"TSB_SC338_R1","mfr_campaign":"SC338","replaces":null,"component":"FUEL/PROPULSION SYSTEM; ELECTRICAL SYSTEM","mfr_system":null,"summary":"TECHNICAL SERVICE BULLETIN: VOLUNTARY EMISSIONS SERVICE CAMPAIGN: BMS S/W LOGIC IMPROVEMENT FOR DTC P1BB2 (SC338) - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. 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 December 15, 2023, and 2023MY Niro HEV (SG2 HEV) vehicles produced from June 21, 2022 through April 25, 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 Emissions Service Campaign supersedes SC335).","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11022364-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11022364-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11022364","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":2023,"match":"exact","vehicle_ids":["2023_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":[]}