I have an occupancy detector switch controlling a split 15a rec. (top half always hot, bottom half switched. )
A very low resistive lighting load is plugged into the rec.
When the switch is set to Auto, the light is always on (low power). I swapped out that load with an incandescent lamp and the switch operates as expected.
My meter is reading 2-3 volts from the recep when the switch is on Auto and no motion is present.
Circuit is grounded all the way to panel.

I figure my options are:
1. Put the switched recep in its own box. It's in a 2gang box with another recep.
2. Find a way to add resistance to the low light load.
3. Try another switch.