[twotonetommy]

Just thought I would solicit advice from the huge knowledge base we have on this forum.

I have installed a Weapon R header with a modified test pipe which includes a Vibrant High Flow cat. I also have the Weapon R CEL eliminator.

Anyway, every now and then (once every 8 or so drives) I get the emissions warning and I then have to disconnect my battery to erase the warning.

Does anyone have any advice on how to eliminate this emission problem? I do not have the exact code.

Here is my setup:

CODE P0139

Thanks

 

[willyboyk24]

Try to get the code,
2nd O2 may be going out. Are there any drivability problems when the check engine light appears?

 

[din9lebeRrY]

pull the code, thats very important. That will tell you which o2 sensor is the problem.

 

[twotonetommy]

This may sound bad but how do I pull the code?

Thanks

 

[LeeMaster]

When the emission comes up again, take it to autozone and have them scan your car.

 

[daviddoroshenko]

By any chance, when it goes on, are you going hard on the car? For me if i take it easy, i don't have the light, when i get on it, i get the light.

 

[twotonetommy]

As for going hard, yes when the light was first coming on, it seemed to be only when I pushed it to a high rpm. The last light came on when I was very relaxed on the throttle and did not hit a high rpm for the entire ride. Kept the rpm's below 3500 the whole time.

So its sporadic.

All suggestions are welcome.

 

[willyboyk24]

We really can't help unless you get the code pulled. Next time it comes on don't unplug the battery and go to a local autoparts store and ask them if they have a code scanner.

 

[twotonetommy]

Just borrowed a code scanner from a friend. The next time it comes up I will check the code and check back here.

Thanks for the replies

By the way, no drivability issues when it comes on.

 

[twotonetommy]

The light came on again and the code that comes up is PO139. Is this an O2 issue?

If I need a new O2 sensor, can someone recommend one that is reasonably priced and from where?

Thanks to all

 

[H22_J30_K24]

I'm no expert but this link looks relevant. OBD2 - OBDII Code P0139 HONDA - HO2S Bank 1 Sensor 2 Slow Response | Engine-Codes.com
So seems like the question is - is it a bad o2 sensor or your header/hi-flow cat causing the issue?

 

[din9lebeRrY]

I have the same code pop up here and there but I don't even have a header/cat/tp lol. It comes when I push on it though.

 

[Chin273]

thanks for sharing....

 

[twotonetommy]

yeah I would love to know how to resolve this.

 

[Nino]

yeah I would love to know how to resolve this.

This code indicates slow response on second O2, one in that massive L shaped O2 restrictor. While the sensor might be getting older and not quite as responsive as it used to be, it could very well be too far removed/restricted from the exhaust flow so it doesn't "see" enough of the exhaust gas. I've had good luck in using Vibrant restrictor with adjustable inserts, and find that middle one works very nice wherever I put it, no issues even with older sensors on some older cars.

Vibrant Performance ::.

Something to consider, while replacing sensor might work just fine, if it doesn't this is something to look into. Or try this first and see what it gets you, try plugging sensor without restrictor and see what happens.

Nino

 

[twotonetommy]

Thanks Nino, I think I'll buy the Vibrant restrictor and see

 

[twotonetommy]

After resetting the code by pulling the battery, the code came back a week later. It seems to be doing it more with the colder temperatures.

I wrote Weapon R and they suggested:
"Try unthreading the CEL a little bit and lock it back down. Looks like you might have the CEL too far inside the O2 bung. Sometimes if its too far it will pick up too much exhaust gas and trip the light."

So now I have several things to try. Only problem is I have to go to a garage to have a guy do it.

 

[Nino]

After resetting the code by pulling the battery, the code came back a week later. It seems to be doing it more with the colder temperatures.

I wrote Weapon R and they suggested:
"Try unthreading the CEL a little bit and lock it back down. Looks like you might have the CEL too far inside the O2 bung. Sometimes if its too far it will pick up too much exhaust gas and trip the light."

So now I have several things to try. Only problem is I have to go to a garage to have a guy do it.

CEL? I think they are referring to O2 sensor. This is where Vibrant restrictor is nice, you just change the insert to smaller or larger hole and regulate the amount of gas that O2 "sees". Usually if O2 gets too much gas it would throw Catalyst secondary bank efficiency code.

I'd be tempted to remove that L restrictor you have and plug the O2 straight, when/if you get the code compare to one you have now and you'll know what to do.

Let us know which way this goes.

 

[twotonetommy]

Thanks for the feedback Nino. CEL refers to "Check Engine Light" eliminator.

From the website:
"UNIVERSAL C.E.L. ELIMINATOR
Application: Universal
MSRP: $55
Item Number: 963-111-101
Tired of getting that annoying Check Engine Light (CEL) that can result from removing or replacing your catalytic converter? Weapon R has a bolt-on solution for you that will trick your computer into thinking you have a brand new factory catalytic converter, and will make your CEL a thing of the past! In addition, this CEL eliminator is angled to better accommodate tight spaces where a.."

So I really don't know what to do, unscrew the eliminator some more or just try the Vibrant you suggested. I ordered the Vibrant eliminator just in case.

My only issue is I have no access to do these tests myself so I have to go to a garage and pay each time to try something new. Its a bit frustrating.

 

[Nino]

OK I get it, that is a silly way of calling restrictor, from the picture I can see it is "clockable" with that nut, so they are telling you to back it out basically, hoping that is going to do something. That's a bit of a joke if this restrictor is fixed diameter, backing it out by 1/4" is not going to do anything.
Just replace that thing with Vibrant one, install it with middle size insert in place, see what happens.

Only thing you need to do this job is jack and the couple of jackstands. Even if you don't have wrenches, adjustable one should do as this was out recently anyway, 10 minutes and you are done. Looking at the picture hopefully you don't need to pull cat section off to get that honker off, just looking at the size of it possibly it will hot bottom of the car. If you need to mess with this in the future, vibrant one is nice and compact so you can get it off with cat section attached, effectively making it 1 minute deal to get off (once you are under the car).

If that is not an option, go pay to put in Vibrant restrictor with middle insert and see what happens.

Nino