NISSAN NP300 DTC P1275 Problem

Good afternoon
sorry but it is the first time that I comment on a forum
I can help me with this fault code problem

the
case is that the 2.5 diesel engine is adjusted
if it turns on but does not develop
revolutionize up to 3200RPM
MAXIMUM SPEED 80KM H
in
slope Thanks PD apparently someone from the forum could solve something similar with Navara 2.5 diesel