How Long Can a Car Keep Running After the Key Is Taken Away?

[LaAsher]

As long as the engine is not turned off midway, the car will usually only alert that the key is not in the vehicle but will not shut down automatically. Below is relevant information about car keys: 1. Number of keys: Vehicles come with 2-3 keys. When a new car is handed over to the owner, the salesperson usually reminds the owner to keep the keys safe. 2. Key code: The keychain for a new car consists of 2-3 keys and a metal or plastic piece. On this metal or plastic piece, there is usually a series of numbers printed, which is the key code. Service centers or manufacturers can use this key code to reconfigure keys for the owner.

[VanMaria]

I've been driving for almost twenty years, and this kind of thing might work on older cars, but don't expect it to last long in today's vehicles. Last time I was repairing my car, I accidentally pulled out the key, and the alarm went off before the engine stopped. Modern cars are basically equipped with anti-theft systems; as soon as the key is removed, the car's computer immediately detects it, and the engine shuts off within seconds—very safe. Why is it designed this way? Mainly to prevent car theft; if the car could keep driving, it would be a big problem. In the past, with older models, the engine could idle for a few minutes after the key was removed, but with technological advancements, the protection is stronger. I recommend everyone to understand their own car's features and not to curiously test this out—it's easy to cause accidents and damage the car. Especially with some high-end SUVs, they're even more sensitive, so don't take the risk.

[AbigailFitz]

Oh no, last week I lost my keys while parking at the mall, and the car lights were still on. After just about ten seconds, it turned off by itself and couldn't even move. I asked a few driver friends, and they all said modern cars are designed smartly—they cut off the power immediately when the key is missing to prevent the car from being driven away. The principle is actually quite simple: the car's sensing system is at work, and if it doesn't detect the key, it enters safety mode. For ordinary family cars, the time it can run after the key is taken away won't exceed a minute, and most of the time, it stops almost instantly. I suggest new drivers develop good habits—check the keys when parking and don't be careless. Safety first! Trying this out is pointless and dangerous. If the car doesn't stop and causes an accident, no one can bear the responsibility.

[Imogen]

As a new driver, I did the same thing right after getting my license. Thought I could keep driving after taking out the key? Hilarious! The car immediately beeped and shut off the engine—didn’t wait a second. Modern cars come with anti-theft features; the system automatically locks operations if the key isn’t inside. Never try to outsmart it—safety always comes first. Last time I tested it in the garage, the lights flashed a warning as soon as I removed the key, then the engine cut out. I’d recommend checking your car’s manual—many automatic transmissions are even more sensitive to this. You won’t get far—just park safely and double-check. That’s the right way.