i have a 1995 civic dx, I just recieved what i though was going to be a high flow Catalitic converter, but it is just a resinator that bolts in place of the cat. it has a 02 sensor bung on it. will i throw a check engine light code now?

 

idk if itll throw the light on put plug the o2 sensor with a bolt...ull need to make sure it has pipe threads i had the same prob when i bought a test pipe for mine i just plugged it up n it ran perfect no engine light or nythin n i got the plug from ace hardware i think

 

If it's for your second o2 sensor you might get a CEL, but it won't effect performance. The CEL is to let you know your cat isn't working, which you already know.

But if another problem comes up that would through a CEL, you wouldn't know.

 

well ill give it a try and if i do get a check engine light what do i do? is there any way to not get a check engine light from having no cat?

 

after you plugged the hole what did u do to the o2 sensor?