What causes a Check Engine Light in an Audi A4?

I recently purchased an Audi A4 and the check engine light has come on. I'm not sure what could be causing it and I'm concerned about potential issues. Can anyone provide insight into common causes for a check engine light in an Audi A4?

The check engine light in an Audi A4 can be triggered by a range of issues, such as a faulty oxygen sensor or a loose gas cap. It's best to check the error code and have a professional diagnose the specific issue.

In my experience, the check engine light in an Audi A4 can also be triggered by a faulty ignition coil or a clogged air filter. Make sure to regularly maintain your car to prevent these common issues.