Saxo Stalling at Idle

I also own a Saxo, though I'm not sure of the year. I had a similar problem. Do the symptoms disappear if you open the fuel tank cap?

That's a good idea! I haven't tried running it with the fuel cap open. If the symptoms disappear when the cap is open, what does that indicate?

From what I know, it probably means the hoses are clogged, and the tank ventilation valve is faulty. I'd recommend taking it to a workshop.

It WAS the tank ventilation valve! The hoses were indeed clogged. I replaced the valve and cleaned the hoses. The engine light is off, and it's no longer stalling! It cost me 175€ at the workshop. Thanks for pointing me in the right direction!