What Causes Parking Radar System Failure?
2 Answers
Parking radar system failure can be caused by incorrect sensor installation, presence of foreign objects, high temperatures, and other reasons. The specific causes are explained as follows: Incorrect sensor installation: Incorrect sensor installation, detachment, or damaged sensors. Inspect and repair the sensors, and replace them if damaged. Presence of foreign objects: Foreign objects can cause the radar to be unresponsive. Remove the foreign objects to resolve the issue. This may lead to misalignment of the parking position, resulting in scratches or other damage to the vehicle. High temperatures: High temperatures can affect the environmental adaptability of the reversing radar, impacting the sensitivity of the sensors and the normal response of the processor. Move the vehicle to a shaded area before using the radar.
When encountering parking radar failure, I think the most common issue is with those small black circular sensors. During regular car washes, if the water pressure is too high or wind and rain carry sand and mud onto the sensor surface, mud spots or ice buildup can prevent ultrasonic signals from being emitted. Another scenario is lightly bumping the rear bumper against a wall corner—though the bumper isn't damaged, a loose sensor clip inside can cause false alerts. My friend's car had this issue last time; the radar kept beeping randomly, and a shop inspection revealed the right rear sensor connector was half loose. Wiring aging is also common, especially with frequent trunk openings where wires inside are prone to bending. Some older cars may even have water leakage in the trunk damaging the wiring. Lastly, it's worth checking blown fuses, particularly during summer when high temperatures increase electrical load and risk melting them.
