Zafira A2 - F on boarding computer

Good afternoon to everyone.
I have an A-2 2.0 16V DTI 101CV from 05/2005.
(The whole of the same color, wheel steps, parachoces, plate ..)
I made a y20dth engine change.
The Zafira has a boarding computer, before it said instant consumption, autonomy, l/100km ... and all perfect VAT.
Now I only mark the distagre tour. If I put the instant consumption, I get a "f" with the car still, but if the march the "f" leaves and gives me "0" consumption. Of autonomy tells me that I have 1,500km with both the full and reserve deposit ..
anyone knows where I can find some manual or similar, to say where it takes the consumption data to see if it is a thing of any sensor, cable in poor condition and that it works correctly ..?
Gracias in advance ..