We need to take a calm rational approach to this.
The power steering pump was replaced.
First thing we need to do is look to see how we do this, I am not sure as I don't have a repair manual infront of me, but take a look how it would be replaced
Go through all the steps looking at the car in your head, see what would have been removed to get to the pump. Check all wiring an connections within the general area,
I would definitely reinstall the old throttle position sensor, and never go back to that parts store.
I highly doubt it is a sensor, rather just one that is unplugged. Perhaps the cylinder head temp sensor, which if unplugged the car is going to think its way to hot and is going to go into fail safe mode to prevent the engine from over heating.
Modifying cars is retarded. Buy a bike instead.