Why is the Audi A4 engine light on?

I recently noticed that the engine light in my Audi A4 has turned on. I have always kept up with proper maintenance and was wondering what could be causing this issue.

The engine light could be indicating a problem with your emissions system. It's important to have this checked out by a certified mechanic as soon as possible to prevent any further damage to your vehicle.

Sometimes, the engine light can come on due to a loose or faulty gas cap. Try tightening your gas cap and see if the light goes off. If not, it's best to get your Audi A4 checked by a professional.