Your fuel filter is accessed under the car, a replaceable element, a blocked filter causes low pressure, but the Vauxhall system reports high pressure whether the pressure is too high or low, so the advice to change the filter first is good.
thanks for reply yes filter was changed after I got code still the same and the fuel pressure regulator on high pressure pump was also changed two months agoYour fuel filter is accessed under the car, a replaceable element, a blocked filter causes low pressure, but the Vauxhall system reports high pressure whether the pressure is too high or low, so the advice to change the filter first is good.