What does the flashing small red dot light on the dashboard of an old Ford Focus mean?

[Clara]

Here is an introduction to the reasons for the flashing small red dot light on the dashboard of an old Ford Focus: 1. The flashing small red dot light on the dashboard of an old Ford Focus represents the engine electronic anti-theft indicator. When the driver removes the car key, the light will flash, indicating that the car is in anti-theft mode. If the small red dot light remains lit, it means that a door or some other part of the car is not properly closed, and you should check and close it properly. 2. A transponder is embedded in the car key. As long as the key is inserted into the ignition switch lock cylinder and turned to the ON position, the electronic anti-theft ECU will communicate with the key via radio frequency. If the key is legitimate, the anti-theft ECU will perform a password verification with the engine ECU; if the password verification is correct, the engine will be allowed to start. 3. If the car's electronic anti-theft indicator flashes at the specified frequency, it is completely normal, indicating that the car's engine is in anti-theft mode. If the car fails to start the engine, turn the engine to the ACC position and then to the ON position, and then check whether the transponder in the key is intact. 4. Generally, car anti-theft systems are divided into two types: one is body anti-theft, and the other is engine anti-theft. Body anti-theft is activated after the driver leaves the car, making it impossible to open the car without the original key, and even excessive contact with the car body will trigger the alarm system. The engine anti-theft system is activated the moment the key is removed, flashing at a fixed frequency.