Boxer engine stalls ventilation issue

Hello! I also own a Boxer, and your problem sounds very familiar. The check engine light and stalling issues... Could be a ventilation issue, yes. Has the air flow changed noticeably?

Thanks! I haven't specifically measured air flow, but I have noticed that the engine seems to hesitate slightly on acceleration sometimes. Did you experience anything like that with your vehicle?

That hesitation under acceleration is a key symptom, yes. In my case, it was indeed the fuel tank ventilation, specifically the charcoal filter. I advise you go to the workshop.

Thanks a lot! I took it to the workshop, and you were spot on. The defective activated charcoal filter was indeed the culprit. Repair cost was 275€. Appreciate the advice!