Why does my Audi A1 display a check engine light when my gas tank is less than 1/4 full?

I recently purchased an Audi A1 and have noticed that when my gas tank falls below 1/4 full, the check engine light comes on. What could be causing this and how can I fix it?

The check engine light is likely indicating a problem with your fuel system. This could be caused by a clogged fuel filter or a faulty fuel pump. It's important to get this checked out by a mechanic as soon as possible to avoid further damage to your vehicle.