Hi guys, just wondering if any of you guys have ever removed your O2 Sensor on your Monte. I'm considering doing a cat delete while also removing the damn U-bend. To remove it, I will need to also remove the o2 sensor. Will removing the sensor cause any major problems with the engine? thanks

 

You need to get a tune to take out the sensor, certain P codes, and cat overtemp protection.

 

Yea, even with a tune tho sometimes itll still come back.. It doesnt affect performance but its annoying having to scan all the time to be sure the CEL is still from the o2 sensor..