[Cjnek]

Hi, I want to ask for option to remove or repair low oil pressure from cluster or bcm. 
Its new engine inside after full rebuilding, of course new sealed in oil bowl.
Problem with low oil pressure in that engines is common for me but I checked the oil pressure and its value = 5bar.
I checked wires between oil sensor end ECU, replace oil sensor - still the same.
I don't have faults on ECU. Only information on cluster.
Car has remove DPF and EGR. EEPROM on BCM was programmed to change mileage but on both control unit when I back to original dump - nothings changed error are still with me.
Is it possible to remove fault from BCM/cluster?  Which pin is from oil pressure in BCM/cluster or everything going by CAN protocol?
Car is Zafira C 2.0CDTI 110HP

Thank you in advance, greetings!