Why is my Audi 80's check engine light constantly on?

I recently purchased a used Audi 80 and noticed that the check engine light is always on. What could be causing this and should I be concerned?

It is always important to take any warning lights seriously, especially in a used car. It could be a simple issue such as a loose gas cap or a more serious problem with the engine. I would recommend taking it to a certified mechanic for a diagnosis to be safe.

The check engine light could be indicating a variety of issues, from a faulty sensor to a transmission problem. Without further information, it's difficult to determine the exact cause. I suggest taking it to a mechanic for a diagnostic scan to pinpoint the issue.