How to troubleshoot a check engine light in an Audi A2?

I recently noticed that the check engine light in my Audi A2 turned on. What could be causing this and how can I address it?

First, check that your gas cap is tightened properly. A loose or damaged gas cap is a common cause of a check engine light. If that doesn't solve the issue, you may need to have your car's diagnostic system checked by a mechanic.

It could be a problem with the oxygen sensor or any other sensor in your car. I suggest taking it to a trusted mechanic who can run a diagnostic test and determine the exact cause of the light.

If you recently had any maintenance work done on your car, the light may have been triggered by a loose connection. Double check all connections and if necessary, take your car back to the mechanic to fix any issues.