Why is the security light on?
Likewise, how do I get my car out of anti theft mode?
The first way and most common way to get the anti-theft system to turn off is by using your key fob. You can press the alarm button, and this should get the system to turn off if you are close enough to the vehicle.
Similarly one may ask, what is the security light?
The security light on your vehicle serves has two purposes. On some vehicles, it will flash when the ignition is off, and the OEM security is activated. Its other main purpose is to indicate that the security of your vehicle may have been compromised, and the engine has been immobilized to prevent potential theft.
Anti-theft systems are designed to prevent your vehicle from being stolen. These systems are constantly evolving. Essentially, they work via an electrical circuit disconnecting to prevent power from flowing so your car won't start or will die immediately.