seat cordoba over fuelling can you help ? maybe same as mk2/3 golf engine

Just seeing if anyone has any idea with this,a kid at work has one and its using amazing amounts of petrol,he has tried the lambda's etc but still the same after plugging it in the fault code its bringing up is 00519 map sensor faults or also intake manifold pressure listed on same code has anyone any ideas on this as he is stuck and losing faith,i know my mate had a mk2 gti which had the same problems with using too much fuel but that was the common temp sensors on that does anyone know if this maybe the same of where to start looking for faults for that fault code?