Why is my Ford Focus's check engine light always on?

I've noticed that the check engine light on my Ford Focus is always on. What could be causing this and how can I fix it?

There are a few potential reasons for your check engine light being constantly on, such as a faulty sensor or a problem with the emissions system. I recommend taking your car to a mechanic to have it diagnosed and fixed as soon as possible to avoid any potential issues down the road.

Have you recently filled up your gas tank? Sometimes a loose or missing gas cap can trigger the check engine light. Try tightening or replacing the gas cap and see if the light turns off.

It's always best to consult your car's manual for specific troubleshooting steps. Alternatively, you can also use an OBD scanner to check for any error codes and determine the cause of the check engine light.