P0106 Mazda6 diesel 2006

Question

Hi,

I have a Mazda6 diesel 2006 car... I bought this car recently, when I was driving on the motorway car was really struggling to go over 50 m/h.. no power what so ever, engine management light is on...i dont whats wrong.. I tried to diagnose the car with a software it gives me this message.

P0106 - MANIFOLD ABSOLUTE PRESSURE/ BAROMETRIC PRESSURE CIRCUIT RANGE/ PERFOMANCE

vehiche area power train (p)
area of vehichle system: fuel and air metering
controlled by: ISO/SAE controlled code(core DTC)
controll unit: $7E8 - CAN-ID ECU #1

Can somebody please expalin what could be the problem and solutions

advance thanks for the help