Why does the check engine light come on in an Audi 80?

I just noticed the check engine light is on in my Audi 80. I haven't experienced any noticeable issues while driving. Can anyone explain why this light may have turned on and if it could indicate a serious problem?

The check engine light typically indicates a problem with the vehicle's emissions system. It could be something as simple as a loose gas cap, or it could be a more serious issue. Either way, it's best to have it checked out by a mechanic as soon as possible.

One common reason for the check engine light to come on in an Audi 80 is an issue with the oxygen sensor. This is an important component in the emissions system and may need to be replaced.

I had a similar issue with my Audi 80 and it turned out to be a faulty catalytic converter. This is a more expensive repair, so definitely get it checked out sooner rather than later.