Why is my Audi 80 displaying the check engine light after replacing the spark plugs?

I recently replaced the spark plugs on my Audi 80 but the check engine light is now appearing on my dashboard. What could be causing this and how can I fix it?

The check engine light is most likely appearing due to a faulty oxygen sensor. It is important to get this checked and replaced by a professional mechanic to ensure proper functioning of your vehicle.

Double check to make sure you installed the new spark plugs correctly. Improper installation can cause issues with the engine and trigger the check engine light.