Why is my Audi A2 continuously showing the 'check engine' light?

I recently purchased a used Audi A2 and after a few days of driving, the 'check engine' light appeared on my dashboard. I've checked the oil and everything seems fine. What could be causing this and what should I do?

The 'check engine' light can be triggered by a variety of issues, ranging from something simple like a loose gas cap to a more serious problem with your engine. The best course of action would be to take your Audi to a certified mechanic for a diagnostic test to determine the exact cause of the light.