I have a p0122 throttle position sensor low curcuit.

So you have 5 volts to the sensor?Also your best bet would be to get a scan tool that reads live engine data so you can see what the tps is reading in the computer.There only like 54 on amazon.

I have one wire that reads 0volts,another wire that reads 2.5volts,and the last that reads battery voltage(13.4volts).

So do you have a scan tool that reads live engine data?Also what size engine do you have?

I do not have a scan tool at this time...it has a 5.8l 351w engine

I have borrowed a scan tool from a neighbor,but i don't know if it can read live data(???)