O2 sensor codes

[skrelnik]

Good information. My 06 unlimited has a long crank to start now. I got those four codes for the o2 sensors. I ve done new fuel pump ,new injectors, crankshaft sync. New plugs and new oem sensors. Still long crank. Ether pcm or upper cats are my last two options of being bad.

It could also be the wire in between the pcm and O2 sensors. That wire harness could be damaged. See if you can trace those wires for any damage.

I used a Wranglerfix PCM and bought a magnaflow with new cats. Those four errors all came back and my next step is those wires as I cannot think of anything else...