Why is the emission control light on in my Audi 80?

I recently bought a used Audi 80 and noticed the emission control light is always on. What could be causing this and how can I fix it?

The emission control light is most likely due to a faulty oxygen sensor. It is a common issue in older Audi 80 models. I suggest taking it to a mechanic for a diagnosis and replacement if needed.

Check your fuel cap to make sure it is tightly sealed. A loose or damaged fuel cap can cause the light to turn on. If the cap is fine, bring it to a mechanic for further inspection.

The emission control light can also indicate a problem with your catalytic converter. It may need to be replaced if it is no longer functioning properly. Have a professional check it out to be sure.