[import2nr]

What year is your truck? 4x2 or 4x4 and where are the sensors located? Before or after your cats? Did you remember to reconnect the sensors to the wire harness?

 

[import2nr]

Truck is a 2010 2wd, sensors are plugged in, on the 91 tune, the pipes are from Berk so the rear 02s are behind. Just checked for exhaust leaks and didnt find any. Reset the ECU and im going to drive it for a bit

Is it possible that you damaged the the 02 sensors during the install? Did you bang them up or bend anything or pinch a wire. These sensors are very sensitive and if your crush or pinch the wires they could be no good anymore.