Factory sensor voltage to value charts?

The short cop out answer is the factory service manual. Problem is the book or online ones for newer vehicle s aren't readily available. You can try going to the sensor suppliers webpages and look for technical resources. Some vendors have tutorials or books that have this information. I remember seeing a few but am having trouble finding any at the moment. I also seem to recall that Cardone had a paper book available at one time for pre Y2K vehicles.