Q. I have a 2009 Chevy Cobalt. The car was running but had some fault codes, one being a faulty ignition switch. I replaced the switch and did a key relearn, and now the car will not crank or start.

Solenoids are everywhere. They open the water valve in your dishwasher, control the flow of gas in your stove, regulate ink delivery in printers, and play a crucial role under the hood of your car.

Just like spark plugs, ignition coils can wear down and become faulty over time. There are many common signs that an ignition coil is getting bad, but one obvious sign is an engine misfire, typically ...

Here's a frustrating hypothetical: you return home from a long day of work, turn your car off, and move to pull your key out of the ignition. Only, instead of the quick click and removal that usually ...

Your car needs electricity. You don't have mice striking flint in your engine's combustion chambers, nor do you have kerosene lamps for headlights. You might be able to hire a string quartet to ...

John Paul, AAA Northeast's Car Doctor, answers a question from a reader who ran into trouble after installing a new ignition switch. The Car Doctor answers a question from a reader who ran into ...