Why is the check engine light on in my Audi A6?

I noticed that the 'check engine' light is on in my Audi A6. What could be causing this and what should I do about it?

The check engine light is a warning that your car's computer has detected a problem with one of the engine's components. It could be something as simple as a loose gas cap or something more serious. It's important to get it checked out as soon as possible.

It's best to take your Audi A6 to a certified mechanic to have it diagnosed. They can use diagnostic tools to read the error codes and determine the cause of the check engine light. Don't ignore it, as it could lead to bigger and more expensive issues down the road.