How to Use an OBD-II Scan Tool

With car computers doing so much heavy lifting these days, knowing how to use a hand-held scanning tool to communicate with it is important. Popular Mechanics associate auto editor Ben Wojdyla explains:

* How the onboard diagnostic system works
* Plugging into the car's computer system
* Using a standard type scanner
* The next generation apps on your phone

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Who says you can't work on your own car anymore? Follow Popular Mechanics associate auto editor Ben Wojdyla as he leads viewers, step by step, through repairs, upgrades, and troubleshooting tips. Got car questions? Email Ben, and he may answer them on the show.