New member here..... I have an 07 Nitro that has the following codes, P0138 and P0155. I know the 155 is the pass side upstream and the 138 is drivers side downstream. I installed 2 new factory sensors and also had the dealership to install a new factory PCM. Even after all this, the codes are still there. I checked my wires and even ran new ones, but with no change. Any ideas?