Update:
When I took the Throttle Position Sensor off, I discovered that the voltage can be adjusted from about 0.5 volts to about 4.2 volts if the sensor is turned with a screwdriver.
I also discovered that to get the sensor back in, I had to turn it about 20-40 degrees. This allows the throttle shaft to slip past the "tangs" (tabs) inside the sensor. So when I turned the sensor to get the screws back in, that is what causes the voltage to go up to 2 volts.
So I guess there are a couple of possibilities:
1) The throttle shaft has been turned somehow (previous shop?).
If the throttle shaft has been turned, can it be "adjusted" back some?
2) This is the wrong sensor? It says "CTS" on one side and has the following numbers on the other side (top to bottom):
0932A
5234904
24936
Thanks in advance,