Coolant leakage, engine overheating, and white smoke from the exhaust due to an internal leak at the...
Hyundai technical service bulletin 23-EM-009H for 2020-2023 Hyundai Sonata Hybrid.
- Bulletin number
- 23-EM-009H
- Component
- Engine and engine cooling
- Summary
- Certain 2020-2023MY Sonata Hybrid (DN8 HEV) vehicles may exhibit coolant leakage, engine overheating, and white smoke from the exhaust due to an internal leak at the Exhaust Heat Recovery System (EHRS) portion of the center muffler assembly. Follow the procedure outlined in this bulletin to repair this condition after confirming EHRS is leaking internally.
Owners of these vehicles have filed 41 complaints in the engine category.
Vehicles covered
- Hyundai Sonata Hybrid 2020-2023 2020202120222023
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