Read more from Peter F Meier

And the most misdiagnosed.

Grab a generic OBD-II scan tool and take these first steps to turn it off and keep it off.

You don’t need an expensive scan tool to diagnose the cause of an illuminated check engine light.

Formal education teaches you theory and the real world teaches you the rest.

It might be time to rethink oil changes.

Understanding how voltage is used in an electrical circuit can help your troubleshooting.

Just because it says “DOT 4” on the bottle doesn’t mean it’s the correct DOT 4 for the vehicle.

Many vehicles today have made the switch to DC brushless fuel pumps. They don’t work like the older brush-type pumps do.

Brake fluid can wear out just like any other fluid.

Inspection of a belt goes beyond the old standbys of checking for cracks and fraying.