How to troubleshoot a Check Engine Light in an Audi A4?

I recently noticed that the Check Engine Light in my Audi A4 turned on. What could be causing this and how can I address the issue?

When the Check Engine Light turns on, it indicates that the engine's computer has detected an issue. It could be something minor or something that requires immediate attention. Regardless, it's important to get it checked by a professional mechanic.

Some common reasons for a Check Engine Light in an Audi A4 include a faulty oxygen sensor, a loose gas cap, or a damaged catalytic converter. Make sure to check these components first before going to the mechanic.