High pressure fuel sensor fault

Hi my Land Rover discovery 3 has had a few problems lately. I've sorted all problems bar this one as some mechanics are saying it will cost up to or over £1000 to fix.
It's been plugged in and diagnosed with High Pressure Fuel Pump Sensor is basically showing as stuck open. Can anyone help as to how to get the sensor out or is the only way to take the whole body off
Thanks