What Does It Mean When the Car Key Light Stays On?

[GageMarie]

When the car key warning light comes on, it indicates that there may be an issue with the car's anti-theft system or the car key itself. Possible causes include a dead car key battery or an engine malfunction. Here are some relevant details: 1. Car Key: The primary function of a car remote key is to remotely lock and unlock the car doors. In addition to controlling the doors, it can also operate the windows and the trunk, both of which are commonly used in daily life. For instance, when you want to increase air circulation inside the car for ventilation or to remove odors, you can simply use the key to roll down the windows. 2. Working Principle: When the owner presses a button on the key, the key sends out a signal. This signal contains specific command information. The car's antenna receives the radio signal, and after authentication by the Body Control Module (BCM), the actuator performs the lock/unlock action.