97 Camaro z28

I had my oil pump drive housing break on me. I replaced the oil pump and the housing with a billet housing. I finally got her all back together and now it won't start. It will crank and I did manage to get it started once (don't know how) but it ran like crap and wouldn't shift into second also the idle was high. The only code is p0122. I have tested the sensor and can't get a reading from the two power wires ground is good. I can't find any broken wires and replaced the sensor. I don't normally just change parts but I had one already so I put it in. Still the same thing. Anybody have any ideas where to go from here. The car ran fine before and I have good oil pressure

 

If you are not getting 5v reference voltage on the grey wire, you need to find out why. It goes back to the PCM (C2, pin 28).

 

Thank you I will check it out

 

Ok here's what I found there was a broken wire all the way up where it t's off. Fixed it and all is good now