Quick Question About 02 Sensors

[f80mthirty]

Hello,

I have been getting the code 12B304 and 12B404 for 02 sensors for a while now. I am stage 2 bm3 currently and 100% certain my 02 sensors are fried. Is it needed to replace these 02 sensors or can i just delete the code in bm3 and forget about them? Pretty sure these are secondary oxygen sensors and not really sure if they are essential to the car. Cause rough idle etc

[madboosted]

Out of curiosity has you CEL been on and off. I have code O2 sensors as well but the cel wil sometimes come on for a few hour, a day or a week. but then it can go away for like a month and come back.

[lookitsapples]

I just replaced my secondary o2 sensors and had the 12B404 code. Bm3 won’t be able to keep the cel off and I was getting terrible mpg because they were fried. My idle was terrible too, car would stall out. All fixed when I replaced it