I'm changing my cat converter and was just wondering if i need the O2 sensor on my new one? Would there be any problems if i dont put on the O2 senor....
Its a 98 civic coupe

 

Yes there is a problem one you would have a hole in the new cat (exhaust leak) and two you would have a CEL for your O2 sensor not reading anything.

 

I have to cats one with a hole and one without.....and what is a CEL?
i know im a noob1

 

Yes, you will get a CEL if you dont run your 02. You could get a plug or a simulator...or throw in a secondary 02 for it. I believe it's the secondary 02 that you are referring to for your OBD II.


Not running an 02 can bog down your car, run in safe mode(correct me if I'm wrong guys), etc.


EDIT: beat me to it


CEL = check engine light

 

yes its the secondary sensor...but if i use the cat without the O2 sensor hole would it still work ok

 

i hope u are not doing the work your self. plain and simple u need the second o2 sensor other wise your car is going to run like ****. so that means buy the right cat for your car

 

well i guess i have both the right and wrong sweetness.....its a plain and simple question....a simple answer is all im lookin for thanks.

 

First, this new cat you have is most likely for a 92-95 Civic (OBD1). That is why there is no O2 sensor bung. Yes, this cat will fit your vehicle still but is the incorrect part for your model. Second, if you chose to use this cat you will get a check engine light. If your O2 sensor is not installed it will not be doing its job. See
your oxygen sensor monitors the fuel mixture so the engine computer can adjust the air/fuel ratio to maintain the lowest possible emissions and best fuel economy. It acts as rich/lean switch signaling the computer these changes. It is important to consider this. Try and get a cat with the hole for your O2 sensor...you will be better off. I don't recommend just clearing the code and ignoring this. It is up to you. GOOD LUCK!

 

Honestly, if you dont want to do it the right way, go and try to run it w/o the 02. You will see what we are trying to tell you.

 

y0 big C just wait till i get home on fri and we can try it again

 

yes, it will/can put your ecu into safe mode.

which means you wont be making 72fwhp any more y000

 

Thanks fo the advice...but i got one with an O2 hole that is now for sale..lol...I just said f*uck it and i figured out a better of way of doing it....and it works the CEL doesnt come on and the O2 sensor is connected and working. It sounds damn good