Before I figured out how to work on cars, onboard computer systems scared me. I’ve had no formal training, after all, so the idea of a car’s complex electricals and countless sensors made DIY work ...

Modern vehicles are packed with technology that monitors vital signs and can alert the owner to a potential problem. But the issue for the everyday motorist is that warning lights only tend to come on ...

After all, that’s precisely what the shop will do—so why not arm yourself with the same info? These days, there’s a huge range of scanners available, from basic plug-ins to high-tech Bluetooth models ...