Warning light due to DTC Code P1BB20 (12V Lithium Battery Cell Voltage High)
Hyundai technical service bulletin 25-01-010H DN for 2020-2022 Hyundai Sonata Hybrid, 2022, 2024 Hyundai Tucson Hybrid and 2021-2023 Hyundai Elantra Hybrid.
- Bulletin number
- 25-01-010H DN (9B4)
- Component
- Fuel/propulsion system
- Summary
- Certain Elantra hybrid (CN7 HEV), Sonata hybrid (DN8 HEV), and Tucson hybrid (NX4 HEV) vehicles may exhibit a warning light due to DTC Code P1BB20 (12V Lithium Battery Cell Voltage High). Follow the procedure in TSB 25-01-010H (or latest version) to perform the update the Battery management System (BMS) software.
Owners of these vehicles have filed 43 complaints in the fuel system category.
Vehicles covered
- Hyundai Sonata Hybrid 2020-2022 202020212022
- Hyundai Tucson Hybrid 2022, 2024 20222024
- Hyundai Elantra Hybrid 2021-2023 202120222023
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