What should I do if my Ford Ranger's check engine light is on?

I recently bought a Ford Ranger and the check engine light keeps coming on. What could be causing this and how can I fix it?

You should first check the gas cap to make sure it is properly sealed. If that doesn't fix the issue, you should take your Ford Ranger to a mechanic for a diagnostic test.

The check engine light could be indicating a problem with the oxygen sensor. I recommend taking it to a mechanic to get it replaced.