What causes the check engine light to come on in an Audi A3?

My check engine light has recently come on in my Audi A3 and I'm not sure what's causing it. Can anyone give me some insight into what might be causing this issue?

The check engine light can come on for a variety of reasons in an Audi A3. It could be a minor issue such as a loose gas cap or a more serious problem with the engine. I recommend taking your car to a certified Audi mechanic to get it checked out and properly diagnosed.

I had the same issue with my Audi A3 and it turned out to be an issue with the oxygen sensor. I had it replaced and the check engine light hasn't come on since. I would suggest getting it checked out by a professional to see if this could be the problem.