What does a key symbol displayed on the car dashboard mean?

[LaJason]

When a key symbol appears on the car dashboard, it indicates that the vehicle's anti-theft system has been triggered. After the anti-theft system light comes on, the following phenomena should be noted: 1. If the anti-theft system light is on and the car won't start, it means the vehicle cannot be activated. The anti-theft indicator light includes both the factory-installed anti-theft indicator and any aftermarket anti-theft system indicators. The anti-theft indicator has armed and disarmed states, with different flashing frequencies in these two states. 2. It's important to note that if the engine anti-theft light flashes once every 1 to 2 seconds, this is normal. It indicates that the vehicle's engine has entered the anti-theft state and the engine immobilizer is functioning properly. This is a normal condition that doesn't require the owner to deactivate it, and the power consumption is negligible, posing no issues for the battery.