Why is the car's reverse light always on?

[XavierRose]

That's because the reverse switch is constantly activated, possibly due to a malfunction. In this case, you should visit a 4S shop to check for wiring leaks. Reasons why the car's reverse light stays on: 1. Poor performance of the reverse radar itself: This is caused by the reverse radar control unit's own poor performance. 2. Abnormal connection of related wiring. 3. The menu key on the audio system was turned off: The menu key on the audio system was disabled in the central control computer, which includes an option for the reverse radar or parking assist. You can choose to turn it on or off, and it should be set to 'on'.