What does it mean when the key symbol light comes on in a car?

[DeElliot]

When the key symbol light comes on in a car, it indicates that the car key battery is low. Here is some information about car keys: 1. Introduction: Essentially, it serves as a remote control for the car. 2. Functions: In addition to controlling the locking and unlocking of the car doors, the car remote can also control the windows and the trunk, both of which are commonly used in daily life. When you want to increase air circulation inside the car for ventilation or to remove odors, you can simply use the remote to roll down the windows. 3. Principle: The signal contains corresponding command information. The car's antenna receives the radio signal, and after authentication by the Body Control Module (BCM), the actuator performs the locking or unlocking action.