ve rear reverse sensors

[wombat tow]

hi there guys/girls I have a problem, I was involved in a accident hit in the arse got the car fixed but the sensors aren't working properly they keep beeping as if there is something there, holden checked it and said there is a faulty sensor still got it changed at the panel shop but its still doinig it took it back to holden on Tuesday they put a whole new set of sensors on the car and it still isn't working properly and they have also changed the module, can any one give me any ideas on what could be wrong as its only happened since the accident.
thanks

 

[Tasmaniak]

One of the wires leading from a sensor to the module will be crushed. Disconnect each sensor from the module until you locate which one