Why does the Volkswagen reversing radar beep and flash?
2 Answers
If the Volkswagen reversing radar emits a long beep and then flashes, and the radar still makes noise but the reversing light does not come on, it may be due to a malfunction in the reversing radar module. If the reversing light stays on, it could be a short circuit in the reversing light switch wiring, requiring inspection and repair. Below are the main functions of the reversing radar: 1. Distance measurement: Accurately measures the distance between the rear of the vehicle and the nearest obstacle. 2. Warning reminder: When reversing to the limit distance, it emits a rapid warning sound to alert the driver to brake. It can also repeatedly issue voice warnings to remind pedestrians to be cautious. 3. Easier reversing: Automatically activates the reversing radar when reversing, allowing the driver to know if there are obstacles behind the vehicle without turning their head, making parking and reversing easier and safer.
Last time I went to get my car fixed, I encountered a similar issue where the reverse radar kept buzzing and flashing red. The mechanic fiddled around for a while and found that the small black dot on the rear bumper—the radar sensor—was completely covered in mud. He said never to blast the sensor directly with a high-pressure water gun when washing the car, as it can easily damage the sensor. If the sensor is broken or the wiring connection is loose, the radar will give false alarms. Also, if the wires for an aftermarket dashcam are bundled too close to the radar wires, electromagnetic interference can cause the system to malfunction. Once, my neighbor had to replace the entire control box because of this issue, costing several hundred dollars, so checking early can save a lot of money.
