I'm experiencing a problem with my 2017 Seat Toledo diesel. The check engine light is on, and I've noticed the car overheating. The mileage is at 125037 km. I suspect it might be the active air flap, specifically a defective electromechanism, based on some research. Could this be related to the cooling system and thermal management? Has anyone else had a similar experience?

Seat Toledo Diesel Overheating Problem

Sounds like a faulty active air flap. I had a similar issue with my BMW a while back. The check engine light kept coming on, and the engine was running hotter than usual. Does your Seat's temperature gauge read higher than normal? Also, have you noticed any changes in fuel consumption?

The temperature gauge does seem a bit higher than usual, yes. Fuel consumption seems normal though. What exactly was the problem with your BMW, and how did you fix it?

Yes, in my case it was the flap motor on the active air flap system that failed. It's part of the thermal management system, controlling airflow to the radiator. Because it was stuck closed, it caused car overheating. The check engine light was also triggered. I ended up replacing the entire unit. If you suspect the electromechanism, it's probably best to get it checked out by a professional to confirm. A diagnostic tool should pinpoint the issue. Better safe than sorry when it comes to car overheating.

Thanks for the help and advice. I took it to a mechanic, and you were spot on. The electromechanism for the active air flap was indeed defective. Had it replaced, cost me 590€. Hopefully, that's the end of the car overheating and check engine light issues.