Park Sensor - Sensors or Plug

[Aviator]

hi all,

I recently bought a 2009 A4 B8, the parking sensor is not working with a long beep and flashing parking button.
suitation is exactly same as .

I used the method on the youtube above and found out all front 4 sensors are work and all rear 4 sensors are NOT work.

not I am wonder is there is plug or loose wire in my car, cos I don't think 4 sensors will break at the same time.

I don't have VCD cable (even if I have, can I tell if it is actually a plug issue)

pls suggest

cheers

 

[Zafi]

Bodyshop probably forgot to plug it back in. Same thing with my ambient temp sensor on my previous car.