A car diagnostic test is a test run to determine the cause of a vehicle’s malfunctioned part or what has triggered the check engine light to come on the dashboard. Diagnostic tests can reveal problems ...

We've all been there: you're driving along, minding your own business, when all of a sudden your check engine light comes on or you begin to hear a mysterious rattle that you can't quite identify. At ...

If you don't catch the issue before the check engine light comes on, or diagnose it yourself with a handy car diagnostic tool, here are a few things you need to know about what causes a P0128 ...

The check engine light is one of those dashboard warning lights drivers dread to see suddenly come on in the middle of ...

For example, the Harbor Freight Icon T10 diagnostic tool, which is designed to compete with one of Snap-On's most popular scanners, allows you to view and clear DTCs like basic code readers.

Consumer Reports explains what the check engine light means and what to do when you see it: how to tell if your car has a loose gas cap—or a serious engine problem.

Because car diagnostic tests require specific devices and expertise to read correctly, most tests are performed by mechanics. However, you can also perform a car diagnostic test at home. Car ...