i norm use a programe to get that information,. but i lost it when my hardrive failed and it wont reinstall without some code now for some reason, so i cant advise on the mabda or the temp sensor.
but if i remember rightly, the temp sensor is ranged over 5v depending on temp.
lambda, erm, white wires are heater wires, brack is return, and grey is feed if i again, remember rightly, what the voltage should be though im not sure