ok.. so i have a x3 and a aem wideband gage

i've got it all wired up and can see it logging on the livewire program

but when i run the truck the gage shows me one thing
then i look at the data i log and its another thing

example gage shows 12.6 and data shows 11.2

big diffrance.. why? wich one is correct..

thanks for any info

Ken