Sarah Mitroff has worn many hats at CNET, including Senior Mobile Editor and Managing Editor of Health and Wellness. Currently, she is a freelance editor. Throughout her career, she's written about ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Modern cars are technological marvels, and understanding what’s happening under the hood has never been ...

I’m a shadetree mechanic and recently bought an OBDII/CAN scanner. I chose the cheapest unit I could find (about $25), and it seems that all it will do is read and/or clear any codes that are set.

I'm a shadetree mechanic and recently bought an OBDII/CAN scanner. I chose the cheapest unit I could find (about $25), and it seems that all it will do is read and/or clear any codes that are set.