Seat Exeo Engine Stalling At Idle

Sounds like a purge valve issue. I had similar symptoms with my old Renault Megane. Check engine light and stalling at idle are classic signs. Have you checked the hoses connected to the fuel tank? Sometimes they get clogged or cracked, causing vacuum leaks.

When you mention hoses connected to the fuel tank, are you talking about the ones near the fuel filter, or are there others? Are there specific areas that are more prone to clogging or cracking?

I meant the hoses running to and from the purge valve, which is part of the tank ventilation system. On my Megane, the cracks were tiny and hard to spot without bending the hoses. If you've checked those already, it might be the valve itself that's faulty. You're probably better off taking it to a workshop for a diagnosis. They can do a smoke test to find any leaks.

I wanted to say that you were right. I went to a local mechanic, and after a smoke test, they said it was the tank ventilation valve. They replaced the purge valve and cleared the check engine light. It was about 175€, but the stalling is gone. Thanks for the help.