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Is It Normal for the Letter P with Three Slashes Light to Stay On in the Car?

1 Answers
LaWeston
07/29/25 6:11am
The letter P with three slashes light staying on in the car is a normal phenomenon. The letter P with three slashes light indicates the reverse radar, and when it is on, it means the reverse radar is activated. The technical name for the reverse radar is the reverse collision avoidance radar. It works by emitting ultrasonic waves through radar probes to calculate the distance to obstacles, and then alerts the driver with different frequency alarms based on the distance, helping the driver better control parking orientation. The function of the reverse radar: The reverse radar is a safety assistance device when the car is parked or reversing. It can inform the driver about surrounding obstacles through sound or more intuitive displays, eliminating the troubles caused by the driver looking around when parking, reversing, or starting the vehicle, and helping the driver overcome blind spots and unclear vision. The reverse radar mainly consists of ultrasonic sensors, a controller, and a display or buzzer. Ultrasonic sensors: Their main function is to emit and receive ultrasonic signals, then input the signals into the main unit, which displays them through display devices. Controller: It processes the signals and calculates the distance and orientation between the car body and obstacles. Display or buzzer: When the sensors detect that the car is at a dangerous distance from an obstacle, the system alerts the driver through the display and buzzer.
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