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To start a car in freezing cold winter weather, start by shutting all of the doors and turning off any accessories, like the heater, radio, and lights. Then, put the keys in the ignition and turn and hold the key for up to 10 seconds. If the car doesn't start after 10 seconds, wait a minute or 2 before trying again. If you're still not able to start the car, the battery may be dead and you'll need to jump start it with jumper cables and another vehicle. For tips on preventing a dead battery during freezing cold weather, scroll down!