What should I do if my Audi's check engine light is on?

My Audi's check engine light recently turned on, and I'm not sure what to do. What could be causing this issue and how can I fix it?

The check engine light can indicate a variety of issues, ranging from minor to more serious. It's best to bring your Audi to a certified mechanic or Audi dealership to have them diagnose the problem and give you an accurate assessment. However, if your car is running smoothly and you haven't noticed any significant changes in performance, it could just be an issue with the sensor. In any case, it's always better to err on the side of caution and have a professional take a look.