Some people use AFR...sensors use lambda where stoichimetric = 1:1
mVolt. On mine the sensor linearisation maps (MAP MAF IAT1 IAT2 ECT1 ECT2 EGT FUEL) are based on 1023 = 5v or 5000mV. So use x4.888 [mV] or x0.004888 [V] I assume its based on a duty cycle...perhaps 9 bit binary. 2D tables with curves or diagonal lines are probaly voltage sensors if the x axes is at or around 1023 max.
I am sure there is experts on here that can explain.