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June 3, 2026 Service bulletin

Check Engine light and store one or more of the DTCs listed below due to an abnormal air-fuel ratio in a...

Hyundai technical service bulletin 26-FL-002H TSB for 2024-2026 Hyundai Sonata Hybrid.

Bulletin number
26-FL-002H TSB
Component
Fuel/propulsion system
Summary
Some Sonata Hybrid (DN8 HEV) vehicles may display a Check Engine light and store one or more of the DTCs listed below due to an abnormal air-fuel ratio in a specific cylinder. This bulletin provides instructions to update the Engine Control Module (ECM) to resolve the air-fuel ratio logic.

Owners of these vehicles have filed 1 complaints in the fuel system category.

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