Hi, I have a 1999 Jeep Grand Cherokee 4.7 V8 with Federal Emissions (2 o2 sensors), however my jeep is giving of codes for P0152, P0130, P0136 (meaning 4 o2 for California edition), I changed out the pcm assuming this was the problem but this problem still consists it says in the codes the bank1 and bank 2 sensors are reading high etc (codes seen above), could this possibly be caused by bad o2? why would it be reading 4 o2 on a federal emission shouldn't it only be to, any help would be great thanks!