Try a new diaphragm in the valve block and a new over pressure sensor, mine did the same and it cured it, hope this may help,

thanks for that will have a look and try and find the problem.

Hi, New to P38 ownership, have a year 2000 2.5 dt and the drivers door electrics are not working, no electric window, no electric mirror, no central locking. the door locks and unlocks with the key in the door, changed the door outstation and checked all the wiring in the door, still no...