Good morning.
I have found in a Fiat Dobl? 1600 16v with lpg system, the following error codes:

u1602 error CAN line
p0571 cruise control
p0460 sensor ****llo fuel
u1600 electronic key
p1687 motorised butterfly (stop learning)
p0171 system lean critical

What do you think ? the problem? I think there is to change the ecu.
The car has an ecu MArelli IAW 5nf hw103. If I wanted to try to mount a Marelli 5nf hw102 would be compatible?