Hi guys ,anyone come across this one before, when I first come to start my 2.2d x type estate it lets out a continuous beep for about four seconds then starts up if I try to reverse the sensors don't work ,no beeping at all but after a drive if I need to reverse then they work ok ??????.

hi you need to find the sensor that has gone down you do this by putting the car into reverse and putting your ear to each sensor you should hear them ticking the one that's not has gone wrong also you can put your finger on them and feel if they vibrate hope this helps trevor