What is the reason for the poor parking signal of the Corolla?

[Michelle]

The reason for the poor parking signal of the Corolla is a problem with the parking radar. It is recommended to have it checked at a professional institution. The relevant introduction of parking radar is as follows: Parking radar detection distance: When reversing, the rear parking radar can detect the distance to obstacles behind. If the distance is very close, it will emit a sound to warn the driver. How parking radar works: The radar probe emits sound waves, which are reflected back when encountering obstacles. The radar probe can calculate the distance between the obstacle and the rear of the car based on the time it takes for the sound waves to be reflected back. Cars equipped with front parking radar and side radar: Can detect the distance between the car body and obstacles around it.