Did your vehicle's check-engine light just pop on? An OBD-II scanner can provide some direction. We tested a handful to find the best for different situations.

For people who fancy the DIY route of maintenance and repairs, diagnostic OBD-II scanners can deliver more detailed information on a vehicle's insides, such as coolant temperature and air-fuel ratio.

The Drive's DIYers show you what an OBD2 scanner is, how it works, how to use one, and which is the best you can have in your home garage.

Best for Smartphones: BlueDriver Pro OBD2 Bluetooth Car Diagnostic Scan Tool Our Methodology The best OBD2 scanners are intended to serve the DIY crowd, and that was my focus as I chose my top picks.

I bought the iDiagnose OBD-II scan tool ( $14.99 through Amazon Prime) to try out OBD Auto Doctor on Windows Phone. It works as advertised, and I have no complaints.

Car diagnostic tests scan a car’s components and integrated systems for errors or malfunctions before they become dangerous. These tests leverage computerization to keep your car in optimal working ...

Get the read on your car issues with an OBD-II code reader. I tried out some of the top brands on the market to find the best one for your needs.

Walmart is selling an 'efficient' $150 OBD2 scanner for just $30 Shoppers say it can easily transition you from “amateur car enthusiast to a more knowledgeable DIY mechanic.” ...