EML Code 2359 Boost Pressure to Low

Vehicle has had a brand new turbo boost pressure sensor (within the last week) and we have fitted a manifold pressure sensor.

Fault Midway through turbo boost it seems to trip out but comes back momenteraly then goes into limp mode but so giving the sensation of a slight judder eml light flashes or stays on.

All hoses have been smoke pro'd and rechecked

Any Ideas