Why does the front parking sensor keep beeping?
2 Answers
There are several possible reasons why the front parking sensor keeps beeping: 1. Signal blockage: Something may be stuck on the radar probe, blocking the signal. In this case, check if there is any obstruction in the vehicle's radar hole. 2. Water ingress in the radar: Leakage from the windshield washer hose or water seeping into the radar system. The owner needs to seal the leak (or replace the hose) and drain any accumulated water in the radar system. 3. Signal interference: The radar ultrasonic signal may be malfunctioning, causing false alarms. Restart the engine, drive the vehicle to an open area, and try reversing again to see if the issue persists.
A few days ago, I also encountered the issue of the radar constantly beeping, which made driving particularly annoying. Based on the experience of repair shops, the most common cause is the radar sensor being covered by mud or bird droppings—simply cleaning it should fix the problem. Additionally, if a new car's film covers the radar area, it can interfere with the signal. Once, my friend's Tiguan had its radar constantly giving false alarms because the bumper was modified, causing the radar angle to be incorrect. Another possibility is the reflection of signals from metal roller doors in underground parking lots—this usually resolves itself once you drive out. I recommend first wiping the metal surfaces of the front and rear sensors with a damp cloth, especially the area below the license plate. If the beeping continues, it's time to check the wiring—there might be rodent damage or water ingress causing a short circuit. If the repair shop suggests replacing the entire radar module, remember to first check the sensor's temperature, as false alarms are more likely after prolonged exposure to summer heat.
