o2 sensor problem

[frisk1]

So for the longest time I have been having a 02 sensor problem. This started about a year ago.

My m4 is just fbo and e85, nothing crazy. Ive done all the supporting mods and more. The only problem I have come across is o2 problems.

Last year I didnt know that you need to change all o2s at the same time so I would go about them by changing one at a time. Usually my post cat sensors would go out. They went out a few times before I recently got all four and changed them at the same time as I saw rhat in a forum.

But recently I got a lean to rich code for one of my post cats. Was super frustrated considering this o2 problem has been haunting me for a year now. Im starting to think its my downpipes as ARM resonated downpipes are actually known to rattle o2s loose (this happened to me). Im honestly gonna probably switch downpipes or just go single turbo to fix the o2 problem😂😂.

No but has anyone else experienced anything similar?? I feel like these cars love to ruin o2s for no reason. Help me.