Ok guys just threw the code for my O2 sensor after the cat as being bad. My question is can I run without this sensor and will it hurt anything? I need to replace the exhasut so I was gonna replace that part of the pipe too with a straight pipe in place of it and not put a sensor back in. My Runner is a '98. Was just wondering if anyone can help me out with this. Thanks

 

Only if you want to give up the gas mileage.

 

you can remove it, but the check engine light will always be on

 

I thought the front one gives the input to the ECU for A/F mixture and the rear is only used for emission? I could be wrong.

George

 

the rear is for emissions, your cel will always be on if its removed, also if you remove the cat and put a strightpipe thats a federal, jailable offense, so is removing the rear o2 sensor as its emission related...