Why is my Volkswagen Passat's check engine light on?

I just recently bought a used Volkswagen Passat and the check engine light has been on for the past few days. I'm not sure what could be causing it, as the car seems to be running fine. Any advice on how to fix this issue?

It's best to take your Passat to a certified mechanic to have the check engine light diagnosed. It could be a range of things causing the light to come on, such as a faulty sensor or even just a loose gas cap.

I had the same issue with my Passat and it turned out to be a problem with the O2 sensor. It's an easy fix and not too expensive.

If your Passat is running fine, it could just be a minor issue. You can try resetting the check engine light by disconnecting the car battery for a few minutes. If it comes back on, then it's best to get it checked out.