Seat Arona Diesel Engine Stalling Issue

That's a bummer. I had something similar happen with my Arona. I didn't have the stalling issue, but the check engine light was on and it turned out to be the purge valve, which is part of the fuel tank ventilation system. Does the car have any trouble when you fill up, like the gas cap being hard to remove, or fuel spitting back? It might be related. I'm no mechanic but that's what happened to me.

Interesting. Spitback with the gas cap, I hadn't thought of that. Now that you mention it, it HAS been a bit harder to remove the gas cap lately, and I think I did have a little fuel spit back on me the last time I filled up. Could a clogged hose really cause all that? How did you figure out it was the purge valve?

Yep, that sounds exactly like what I experienced. The pressure builds up in the fuel tank if the ventilation isn't working properly. The clogged hoses could be the culprit preventing the purge valve from doing its job. Honestly, I didn't figure it out myself. I took it to a mechanic and they ran some tests. I'd recommend doing the same. They have tools to check the whole fuel tank ventilation system, including the purge valve. It's probably worth getting it properly diagnosed before you start throwing parts at it.

Turns out you were spot on. I took it to a workshop and they confirmed it was the tank ventilation valve. They said some of the hoses were pretty clogged. Cost me about 175€, but at least the check engine light is off and it's not stalling anymore. Thanks for your help.