Seat Tarraco Hybrid Engine Light Air Valve Issue

Whoa, that's a lot of kilometers on a 2021! Check engine lights are always annoying. When you say air valve, are you referring to the throttle body area, or something related to the air intake further down the line? A vacuum leak could definitely cause that, especially if it's related to the air supply to the engine. Have you noticed any changes in how the engine idles, like it being rough or uneven?

Throttle body makes sense. What exactly should I be looking for regarding the vacuum leak? Any specific areas prone to issues in that air intake system?

Since it's pointing towards the air valve, focus on the hoses and connections around the throttle body and air intake manifold. The leak can throw off the engine's air-fuel mixture, hence the check engine light. Given the mileage, it's very plausible a hose has become brittle or cracked. Honestly, without specialized tools like a smoke tester, pinpointing the exact location of a vacuum leak can be tricky. It might be worth getting it checked by a workshop to avoid chasing ghosts and potentially causing further issues.

Took it in. You were right. It was a faulty hose connection on the air supply. Total cost was 175€. Thanks for pointing me in the right direction!