How to troubleshoot my Audi check engine light?

I noticed my Audi's check engine light has turned on and I'm not sure what to do. What are some steps I can take to troubleshoot this issue?

First, check if your gas cap is loose or damaged. This is a common cause for the check engine light. If it looks fine, it's best to take your car to a mechanic for a diagnostic test.

Another common reason for the check engine light is a faulty oxygen sensor. This can affect your car's performance and gas mileage. I suggest getting it replaced as soon as possible.

Sometimes, a simple tune-up can fix the check engine light. Make sure your spark plugs, wires, and filters are all in good condition. This can also improve your car's overall performance.