Which boost pressure sensor ???

[Finn2500m14]

Had troubles with my 2012 transporter going into limp mode. The fault codes are as below but i am stuck as to what part these codes refer to.

Any ideas?

Status :P023600 - Boost pressure sensor. Error Message : Signal improbable. Sporadic fault.
Status :P065100 - Sensor reference voltage B. Error Message : Open circuit. Sporadic fault.

Is it this guy: http://www.darksidedevelopments.co.uk/products/1-9...

Any thoughts much appreciated !!