What is a common cause of the Audi 80 engine warning light turning on?

My Audi 80's engine warning light has just turned on while driving, what could be the reason for this and what should I do?

The most common cause for the engine warning light coming on in an Audi 80 is the oxygen sensor malfunctioning. This can cause a decrease in fuel economy and engine performance. I recommend getting it checked and replaced by a professional mechanic as soon as possible.

Another possible reason for the engine warning light turning on in your Audi 80 is a faulty spark plug or spark plug wires. This can cause misfires and potential engine damage if not addressed quickly. I suggest bringing it to an Audi dealership for proper diagnosis and repairs.