 Yeah. Let's look at this with a voltmeter. Don't trust the scan tool. Scan tool is a good way to get codes. It's an okay way to read sensor values. But, for example, I can hook up an OBD2 reader, and I can hook up a snap-on Triton, and I can see two different values all day long. The speed of the processors and how the CPUs work within those tools varies a great deal. So what kind of a voltmeter are you going to use?