What causes the check engine light to turn on in an Audi 80?

I recently bought a used Audi 80 and noticed that the check engine light turned on. I'm not sure what could be causing this - is it a major issue or something I can fix on my own?

The check engine light can be caused by a wide range of issues, from a loose gas cap to a faulty oxygen sensor. It's best to get your car diagnosed by a professional to determine the root cause.

In some cases, the check engine light may simply be a result of a software glitch in the car's onboard computer. Try disconnecting the car's battery for a few minutes and reconnecting it to see if the light turns off.

I had a similar issue with my Audi 80 and it turned out to be a problem with the ignition coils. I would recommend taking your car to a trusted mechanic for a diagnostic test.