When your vehicle's check engine light (CEL) comes on, it's often a sign that something needs attention. But with over 20,000 parts working together in your car — many important for normal operation — ...

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.