I got a CEL after i installed my headers. At first i thought it was me who installed the MIL wrong but i checked it and it looked fine to me. I went to get my code pulled and what came up was P0138
High Voltage (bank 1 sensor 2) now i know its making me run rich, but i have no idea what the hell that is or how to fix it come on guys i need help~ T_T

 

Changing the subject so people know what to expect.

 

Great Translation, I ment that, but it just didnt come out that way

 

if you got you code pulled at a shop they shouldve told you what the problem was.

Id need a little more info to help you out here.

 

Commonly, the CEL caused by an aftermarket header can be fixed with an CEL eliminator. Score one from ILP in the vendor page and call it good.

Ironically enough, my CEL hasn't cut on yet, and I've been running my header for 3 weeks now. Granted, I put my 2nd cat back on, but I didn't think that made a difference since that sensor is BEFORE the cat.
*knocks on wood*

 

i didnt get it pulled @ the shop i got it pulled for free @ the local Autozone and the guy didnt know. He just said High Voltage.

 

I do have a CEL fix it came with my header.
Blair Assures me that that CEL fix works

 

After having read the problem again:

The second sensor having high voltage makes you run rich? Seems odd to me, but I guess it makes some sense (I'm guessing since it isn't getting a high enough reading it thinks you're leaned out and it's richening up the AFR).

Anyway, I'm guessing something's wrong with the resistor(s) in your mil eliminator.

 

Wow, I totally missed the fact that you already had the fix from ILP. Lemme go wake up now.

 

Not From ILP RMR it came with the headers

 

I would have blair send me another mil fix, just in case there is a problem with the resistors on the one that was sent with your headers. I agree with Hobie, that is the most logical scenario.

edit: if you know what the voltage should be, you can always use a multimeter to test the resistor(s).

 

Did you hook it to the wrong O2 sensor?????

 

You could also take a good resistor and wire it in line with the one(s) already there. I dunno how RMR makes theirs, but if they're like ILP's you should be able to just splice the wire and daisy chain resistors to your heart's content.

Most likely it was just damaged or something.

 

hmmmm..... are you using a test pipe with no cats or do you have a cat installed? If you have a cat I don't think you need the cel fix (someone please correct me if I'm wrong here). The cel fix should only be needed if you have no cat.

 

It's because of his header. It removes the 1st cat (pre-cat) that's stock in our exhaust manifold, and our 2nd O2 sensor is BEFORE the second cat. By removing the pre-cat both he's getting the same voltage reading from both sensors so the ECU tosses the CEL.