I wish I knew. I even borowed an oscilloscope from work that lets you log 2 weeks worth of data and rigged up a harness to measure it while driving the car. Also so I could keep the expensive o-scope from being lost or damaged, and watch it while the car was running.
No noise, no out-of-spec voltage fluctuations, no ringing on the waveform. Nothing.
But that was with a sensor that was working correctly at the time. I did not have the opportunity to keep the scope longer than two weeks, and after that the sensor failed.
Now, what I have noticed with the Borg/warner sensor has a bit more amplitude in the signal as compared to the one that recently failed. So a bit stronger of a signal back to the PCM. Maybe the old one was higher, too, when it was new? Don't know.
I have also noticed that when going up overpasses, with the Chrysler sensors, the cruise control would correct in big leaps. Nothing at all, then a lot of acceleration all at once, over-shooting the selected speed, and it cut the throttle severely to slow back down. Wiht the Borg/Warner sensor, it adjusts the speed much more incrementally, both accelerating and decelerating. Getting about two more miles per gallon, also, which I atttribute to the closer control of the speed.
Funny, ive been running chrysler sensors with no problems ever. I replaced them in 05 during my engine swap. You might have wiring connection issues.