Q. Two years ago, I had the fuel pump replaced in my 2012 Ford F-150. Less than a minute after leaving the garage, the “Check Fuel Fill Inlet” light came on. I went back and was told “that happens ...

Viewer-submitted questions for The Car Doctor: Q: Two years ago, I replaced the fuel pump in my 2012 Ford F-150. Less than a minute after leaving the garage, the “Check Fuel Fill Inlet” light came on.

Ignoring a check engine light might feel harmless if the car still runs smoothly, but the warning signals more than a minor inconvenience. Driving with that light on can lead to higher repair costs, ...