Why is the Ford Fiesta's check engine light on?

My Ford Fiesta's check engine light has recently turned on. What could be the cause and how can I fix it?

The check engine light could be indicating various issues with your Ford Fiesta. Some common causes include a loose gas cap, faulty oxygen sensor, or a damaged catalytic converter. It's best to bring your car to a trusted mechanic for a diagnostic test.

I had the same issue with my Ford Fiesta and it turned out to be a faulty oxygen sensor. It's important to get it fixed as soon as possible to prevent further damage and potential costly repairs.

I had a similar problem with my Ford Fiesta and it turned out to be a loose gas cap. Make sure to check the cap and tighten it if necessary before bringing it to a mechanic.