Add Yahoo as a preferred source to see more of our stories on Google. When you leave your car parked for a while, it enters "sleep" mode, but it isn't fully off. Certain systems, like alarms, keyless ...

It's something most drivers will likely deal with at some point: you put your key in the ignition and turn it, only for the engine to struggle to start or not make a sound at all. In many cases, this ...