What to do when the check engine light comes on in an Audi A5?

I recently bought a used Audi A5 and the check engine light just came on. What could be the problem and how should I handle it?

The check engine light could indicate a number of issues, from a loose gas cap to a faulty catalytic converter. The best course of action would be to take your car to a trusted mechanic and have them run a diagnostic test.

It's important to address the check engine light as soon as possible, as it could be warning you of a serious mechanical issue. As a first step, check your gas cap and make sure it's properly tightened. If the light doesn't go off, take your car to a mechanic.

I've had the same issue with my Audi A5 before and it turned out to be a faulty oxygen sensor. My advice would be to have the diagnostic test done and if that's the issue, have it replaced by a certified mechanic.