Why does my Audi A5's check engine light keep coming back on?

I recently had my Audi A5 serviced and the check engine light turned off, but after a few days it came back on. What could be causing this and what should I do?

The check engine light can come on for various reasons, such as a loose gas cap or a faulty sensor. It's best to bring your car back to a reputable mechanic for a diagnostic test to determine the exact cause.

Sometimes the check engine light can turn on for minor issues that don't affect the overall performance of your car. However, it's always best to have it checked out to be safe and avoid any potential future problems.

If your Audi A5 has a history of engine or electrical issues, it's possible that the check engine light could be a recurring problem. In this case, it's important to have a trusted mechanic thoroughly inspect and repair your car.