Why is my Ford Puma's check engine light on?

I recently bought a used Ford Puma and noticed that the check engine light is always on. How do I figure out why and what do I do about it?

The check engine light can indicate a variety of issues, from a loose gas cap to a more serious engine problem. The best way to figure out the cause is to use an OBD-II scanner and get the diagnostic trouble code (DTC) that triggered the light. From there, you can do your own research or take it to a mechanic for further diagnosis and repair.

One possible cause could be a faulty oxygen sensor, which can affect the fuel economy and emissions of your car. It's best to get it checked and replaced if needed.

Another common culprit is a malfunctioning catalytic converter, which can be a pricey fix. Make sure to get it checked and repaired by a professional mechanic.