Car Diagnostic Test Overview A car diagnostic test is a digital analysis of your car’s computer systems and components. The test scans components and systems to check for issues with the engine, ...

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.

Your vehicle's computer contains a wealth of information that it gathers from sensor on almost every system. It used to be that only shops had access to that information, but that's not ...