hi all
my steering is a strange one turn to the right full power assistance turn to the left no assistance at all
just failed its mot on this so any help very much appreciated

bit of an update a new servotronic valve has been fitted but still I only have assistance when turning to the right zero assistance when Turning right.
but on comparing the power Steering pump to my nephews bow x5 and another diesel Range Rover my p/s fluid is pink and frothy looking and looks full of bubbles as if the pump is suffering cavitation