Certain Sonata Hybrid (DN8 HEV) vehicles may exhibit intermittent battery discharge conditions due to the...
Hyundai technical service bulletin 26-01-052H TSB for 2024-2026 Hyundai Sonata Hybrid.
- Bulletin number
- 26-01-052H TSB (LA30)
- Component
- Electrical system
- Summary
- Certain Sonata Hybrid (DN8 HEV) vehicles may exhibit intermittent battery discharge conditions due to the air conditioning controller not fully powering down after the vehicle is turned off and parked. This bulletin provides the procedure to update the Air Temperature Control Unit (ATCU) software; the revised logic improves controller shutdown to prevent battery drain and corrects a condition where the HVAC control display may appear blank when climate remote start is activated via Bluelink.
Owners of these vehicles have filed 5 complaints in the electrical category.
Vehicles covered
- Hyundai Sonata Hybrid 2024-2026 202420252026
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