Actually, my spare does have a TPMS sensor.

What i found is that the Previous owner took the spare out and put it on the car, and then put the original wheel in the trunk. Then he proceeded to buy 3 new tires.

But now my TPMS light is on. The spare does have what looks to be a TPMS sensor on it since the stem matches the other 4. However the car only recognizes 4 at a time so it's not matched to the car

One day when it's warm, i want to put the original wheel back on where it gores and see if that turns the light out. If it does, i'll swap the tires and put the spare wheel back.