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July 16, 2025 Service campaign

Certain Elantra Hybrid (CN7 HEV), Sonata Hybrid (DN8 HEV), and Tucson Hybrid (NX4 HEV) vehicles may...

Hyundai technical service bulletin 25-01-010H-1 DN for 2020-2022 Hyundai Sonata Hybrid, 2022-2024 Hyundai Tucson Hybrid and 2021-2023 Hyundai Elantra Hybrid.

Bulletin number
25-01-010H-1 DN (9B4)
Component
Electrical 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). The California Air Resources Board has determined that these vehicles may be releasing air pollutants which exceed Federal and California standards.

Owners of these vehicles have filed 120 complaints in the electrical category.

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