Imagine quickly diagnosing why your car's check engine light is on. A scan tool, also known as a trouble code reader, can help you identify the problem yourself.

A code reader for your car can mean the difference between dropping everything and heading for the mechanic and letting that warning light ride a little bit.

Multimeters can be a useful tool for both novices and professionals to limit their mistakes in automotive repair. Here's how to properly use one.

You ran a full diagnostic,” he says. According to Sherwood, lots of customers imagine a full diagnostic as a mechanic plugging in a “magic box” to get a list of all the problems a car is having.