search for my threads with lots of ohms / volts / temps. See if it tracks more or less. What I would do - tap the wire at the ECU, connect a volt meter, and take a drive, take notes, take temps if you have a way to do it. I have an infrared thermometer, which is really handy for this kind of thing.
The volt readings should be smooth changes, not jumping around.
It is possible for one of the wires or connections to be broken or intermittent between the sensor and the ECU.