just got my whole exhaust system redone. New headers, cat, and cat-back greddy exhaust. Well i had to have an o2 sensor bung welded to the exhaust. Got that done, came back home and put it all one. I had to extend the wires on the o2 sensor.

Now the check engine light is on and don't know why? Anyone have ideas on what it can be. I allready reset the battery.

 

i tried extending my wires one time to fit a y7 manifold on my y8(don't ask why), but i couldn't get to work either. i think the wires have to be the same exact length.

 

damn. what did you end up doing? did you get an o2 sensor extension? I couldn't find any. Someone said that dc sport made one for like 20 bucks, but i couldn't find it.

 

did u do a ecu code check on the car. check the ECU thread in my sig and that should help you with some of your problems

 

i've never had to check the code on my car. On my brothers prelude there is a place under the steering wheel that you stick a paper clip in and it blinks the code. How do you do it on the 00 civic. thanks.

 

https://honda-tech.com/zerothread?id=682412

 

is it in the same spot on an 92-95 as a 2000?

 

it will be a green plug next to the ecu wiring harness

 

so it's under the glove box and not under the carpet

 

did you reset the ecu before work? Or have you reset it since?

 

i disconnected the battery

 

is that the same as reseting the ecu?

 

yes.

 

k, just making sure

 

You should check the codes first. (Not with the paperclip method). There is an OBD connector somewhere under the dash. Usually by the steering column. Either find a buddy with a diagnostic tool, go to a shop, or you can usually buy a cheap one at a parts store that will work for about $40-50. Once that is done, then you'll know if it is the O2 or not. Then you can start diagnosing it properly. Good luck!

 

make sure that u put the wires color to color. i remember when i did this and i threw a CEL. come to find out that one of the wires was hooked up wrong. after that no code.

 

well, i decided to disconnect all of my battery pos and neg and waited like 2 hourse, plugged it back up, turn it on, no light.....for now. Haven't go to drive it yet because of ice on the roads!! Damn ice. Thanks for your alls helps