VW Taos Parking Assist Failure: Sensor System Alert

Had a similar issue with my 2021 VW Tiguan last summer. Being someone with moderate experience in car maintenance, I initially thought the ultrasonic sensors were failing, but it turned out to be simpler. The workshop diagnosed a faulty wiring connection between the control module and the rear parking sensors. The obstacle detection system kept showing errors because of a loose connector that had accumulated some corrosion. The blind spot sensors remained functional because they operate on a separate circuit. The fix involved cleaning the connector pins and securing the wiring harness properly. Total repair cost was 95€ including diagnostic time. The rearview camera continued working throughout, which helped narrow down the issue to the ultrasonic sensor circuit. Would help to know: Have you noticed any correlation with weather conditions? Does the error appear immediately when starting the car? Are all parking sensors non-functional or just specific ones? Did you recently have any work done near the bumpers? This could help determine if you are dealing with the same connector issue or something different.

Thanks for sharing your experience. Mine has 56515km on the odometer, and the error appears right at startup, regardless of weather. I checked all radar sensors individually using the dealer's diagnostic guide, and the front ones seem completely unresponsive while the rear ones give inconsistent readings. The issue started shortly after my latest service, where they did some work around the front bumper. This makes me suspect the faulty wiring might be related to that service work, especially since the front parking sensors are the ones showing no response at all. I will check the wiring connections first based on your experience. The fact that my blind spot sensors still work normally also points toward a localized wiring issue rather than a complete system failure.

Great observation about the timing of the issue starting after the front bumper work. This strongly reinforces my initial suspicion about wiring connections being the culprit, especially since your symptoms match what I experienced, though in your case focused on the front parking sensors rather than the rear ones. When my parking sensors failed, it also happened after service work, which is why I mentioned checking the connections. A technician confirmed that even slight misalignment of connector pins during reassembly can cause these symptoms. Looking at your diagnostic findings, the unresponsive front parking sensors combined with inconsistent rear readings suggests possible damage or disconnection during the service work. The fact that your blind spot sensors still function normally, just like in my case, points away from a central control module issue. Consider requesting the service center to: Check all connector pins in the front bumper area, Verify proper routing of the sensor wiring harness, Test voltage at each parking sensor connection point, Inspect for pinched wires near recent repair areas Since your issue appeared directly after service work, they should address this under warranty or service guarantee, unlike my 95€ repair which was unrelated to previous work.

I appreciate the detailed follow-up and suggested checks. Makes perfect sense about the service warranty coverage, I will definitely push for that. Planning to take it back to the dealer tomorrow and have them specifically examine the wiring connections in the front bumper area where they worked last time. Will ask them to do a complete check of all the radar sensors and wiring harness connections. Given the timing after the service work and the specific failure pattern of the front parking sensors, this really does point to faulty wiring during reassembly rather than failed proximity sensors or a broader parking assist system problem. The fact that both of our cars had similar symptoms with working blind spot monitoring but failed parking sensors is quite telling. Will update once I get the diagnosis from the dealer. Hoping its just disconnected or pinched wires from the previous service work.