Hyundai Sonata random overheating issue on Hyundai Sonata

Submitted by Vehicle Owner · Jun 23, 2025
Published by RepairPal

Problem overview

Some Hyundai Sonata owners report experiencing random overheating issues due to several potential causes. These include insufficient coolant levels or leaks from hoses or the radiator, which can lead to overheating. A malfunctioning thermostat that fails to regulate coolant flow is another common issue contributing to engine overheating. Additionally, some owners find that a faulty radiator fan may not adequately cool the engine, exacerbating the problem. Coolant leaks from components such as the water pump, radiator, or hoses can also result in overheating. Warning signs like smoke from under the hood, a pegged temperature gauge, or a blown head gasket should be monitored closely, as they indicate overheating. Owners are advised to check coolant levels and ensure they are using the correct type for their Sonata if they notice signs of overheating. Promptly addressing any overheating issues is crucial to avoid engine damage; it is recommended to pull over safely, turn off the engine, and resolve the issue before continuing to drive.

1 person reported this problem
0 comments
Schedule Repair

Hyundai Sonata vehicles with this problem

0 model year affected

Search for another problem

RepairPal Car Genius

Ask our experts about your Hyundai.

RepairPal Car Genius™ is a free resource for vehicle owners seeking advice on maintenance, auto repair, shop inquiries, estimates, and finding a trustworthy repair shop in your area.

 Auto Repair Expert Auto Repair Expert

Call us at 877-913-1554

Available 9am – 6pm ET Monday through Friday

Call Our Experts