YaMaJeSty

i got a problem. i put in dc headers and had my cat cleared out on my ex. check engine lite comes on. anyone know any solutions to fixing it besides getting a new cat? please help

PapaPark

I've heard some people reset the ECU.. do this by unplugging the battery..

but please someone correct me if I'm wrong

YaMaJeSty

tried that but it doesn't fix the problem. the light comes back on in a lil while. can anyone tell me how to FIX the problem? thanks

PapaPark

Sorry I couldn't FIX your problem.. it was worth a shot though..

as a computer tech you learn to check the obvious.. so go back through your install to make sure everything is installed correctly and tightly..

TurboBumblBee

i acn almost garuntee that you damaged your o2 sensor that is on your headers.. you can check to see what code it is throwing out by shorting out the green 2 wire connector above your ECU on the passenger side foot panel.. then come back and tell us what is is.. if its code 41 then its your o2 sensor cause i did the same thing to mine.. if you need more help understanding how to see what code it is, do a search or IM me cause i dont want to write it all out.. and you might know how to do it already..

iluznxpnoi

aye 95civicex....is code 41 the o2 sensor on the header before the Cat or after the CAt.... cuz i got the CEL on...duno which one tough

B18C-EJ1

Code 41 is just the 02 sensor.

Check to make sure they are plugged in correctly. (you'll hear a "click" when they're in)

EE_Chris

Code 41 is for the Primary O2 heater

iluznxpnoi

so if its the HEATER...what or how do you fix this problem...

Wes d

I just had this same code /problem on a friends car, turns out one of the pins popped out on the o2 conector plug. So ya definitly check all conections and hopefully it's an easy fix.

deepnite

OB I or OB II??..if its OBII there is a sensor in the header..right? and another behind the cat..in my car the installers put the O2 sensor infront of the cat. and my lite kept coming on..but its all better now..they moved it to where it belong d

deepnite

if u did any welding to the exhaust, did u remove the sensor?..could have fried the sensor..not a good thing, i think

Kamin

sounds like o2 sensor.
here is how to check the code
To check the code, Take off the passenger side kick panel and look above your ECU (the metal box). find the green rubber housing
with a blue connector (looks like the end of a telephone cord). Get a piece of wire like a paperclip, and
bridge both connections. Now turn your key just before you have to start the car, watch your CEL and get the code.
If the CEL blinks fast, that stands for 1, 2, 3, etc. If it is a long blink, that stands for 10, 20, etc. The code
will recycle, just in case you don't get it the first time. also, there could be multiple codes.


i broke my o2 sensor during my swap. they aint cheap.

deepnite

if u need a sensor replaced..got to pepboys..alot cheaper than OEM