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15 Reasons Why Your Car Won’t Start

Few things are worse in the morning than your car not starting. Here are the possible reasons why—and tips for getting it going again.

Fuel gauge with needle pointing to emptyArjuna Kodisinghe/Shutterstock

You're out of gas

Maybe you were really lost in that riveting podcast on your way home and didn't notice your fuel level dropping. Just make sure that—if your car won't start—the first thing you check is your gas gauge. Slightly embarrassing, yes, but this is the least expensive and easiest fix for a car that won't start.

red clamp on car battery. for charging battery car with electricity.Gargantiopa/Shutterstock

The battery clamps are loose

Your battery may not be dead after all: When your car won't start, pop the hood and check that the battery clamps are secure—and free of battery acid build up. If not, tighten them up and try again to turn the ignition. Don't miss these 74 maintenance tips that will extend the life of your car.

Battery car terminalbenokky1972/Shutterstock

The battery terminals are dirty

If you see some nasty looking whitish, greenish crud around your battery posts, the connection might be weak. Carefully undo the clamps (the crud is acidic) and clean the posts with the proper tool (like this terminal cleaning brush). If you don't have that on hand, try tapping on each terminal to jar some of the gunk loose to get you going again.

car battery and wires connected to it at shallow depth of fieldBACHTUB DMITRII/Shutterstock

The battery is dead

So the terminals are tight and clean and still nothing? You probably have a dead battery. If you have jumper cables, you might be able to find another motorist to give your battery the jolt it needs to start up. Better yet, keep a handy-dandy jumper battery like this one in your car for these situations. Next, check with your mechanic to see if you need a new battery. Here are the best cars under 18K.

Cropped hand of person starting carwavebreakmedia/Shutterstock

The starter stops

When you put in the key and turn your ignition (or, in newer cars, push the button), an electrical motor (the appropriately named starter) connected to the car's battery cranks your engine to get it started. If it will fail to respond, just clicks, or emits a horrible grinding sound, it's time to call the mechanic, says the automotive site yourmechanic.com.

the ignition of the car, starting the engineVladimir Kislitsin/Shutterstock

The fuel pump relay has run its last race

When your car sputters and dies—or if it chugs a little when you start it and then quits—you could be looking at a faulty fuel pump—or fuel pump relay, according to autoblog.com. You'll need a mechanic's help to get this car back on the road again.

Engine start buttontopseller/Shutterstock

The key is the key

Modern cars with push-button ignitions require that the key fob be inside—or at least very close—to the vehicle in order to start. Check to make sure you have your keys on you. Here are the best used cars to buy.

Modern Car remote control key in vehicle interiorPavel Shlykov/Shutterstock

Your car is fine but the key fob is dead

The reason your car won't start may have nothing to do with your car at all. The battery in your key fob may be dead. Check the owner's manual to see how to start your car in this situation or contact your dealer for a new key.

Car gear stick on parking mode, Mechanism of switching modes of automatic transmission car, Top viewJomic/Shutterstock

You cannot drive because you are still in Drive

Another possible reason your car won't start is that you never put your automatic transmission vehicle in Park. Switch gears out of Drive or Reverse into Park, and try again. Here are the car brands that cost the least to repair.

Close up detail of new car engineiMoved Studio/Shutterstock

The engine is flooded

Modern cars don't need you to pump the gas while starting—and you could flood your engine; wet spark plugs won't be able to create the spark needed to start your car, according to NPR's Car Talk experts. They recommend holding the pedal to the floor and cranking the engine until it starts.

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