I just got the OBX catback installed together with an OBX 4-2-1 header and my box is throwing a P0420 code (cat converter below threshold). I'm thinking of getting a mechanical O2 fix just like this one: Megan Racing Mechanical CEL Fix. I know Weapon-r also makes one but by the size of it the Megan one would make a better fit. Then I also saw this: OBD II 2 O2 sensor simulator at E-bay which sends a signal to trick the OBD.

Which do you think would be effective? Has anyone had some some success in either method or any other way to clear out a P0420 code? Your 2 cents is greatly appreciated.

 

I would try to fix the problem first instead of trying to outsmart the ECM with gadgets.

 

Yep! That's what I did. Thanks to a write-up from another forum I was able to work my way around the 2nd O2 sensor. It was a very simple solution and it only cost me $5 at Autozone. I test drove the box for about 30miles and no CEL and I'm hoping it would stay that way for a while.

There were noticeable gains from the added components (OBX 4-2-1 and Catback). I was reaching cruising speeds much faster and the pull from a standstill is just awesome. I would enjoy those for a while but in the end I will go ahead and get me a cat-converter like this one. There's just that voice in the back of my head that keeps on reminding me that "the cat-converter is there for a reason."

I'm just hoping that it's just my conscience or else I probably am going nuts...

 

what you use with 5 dollar

 

That's some awesome English right there, folks!

 

Did your CEL ever come back on after the fix and the 30 Min test drive? and what was the repair I don't see the link for the write up.

 

Ok I'm going to give ya'll the low down on this...

The CEL came back! Well its more like on again then off again thing. I can't stand the stink that the no-cat spews so now I'm back to stock with my Tsudo muffler. What I'm planning to do is putting the obx pipe after the stock resonator to use the stock cat and free up the bottle neck that the very slim pipe after the resonator is causing. Hence, I will also use the muffler the obx setup came with. What I hate about the obx catback beyond not having a cat is the raspy sound it's making. This is due to the no-cat setup. Honestly I like the looks of the Tsudo muffler but if I'm going to use the post resonator piping from the obx setup, I would need to use its mufller too.

Now about the links, the url were embedded in the words. But here they are anyway:

The forum that I swiped the idea from:
http://www.k-series.com/forum/showthread.php?t=8833

The Cat-converter that I was thinking of using if I would continue with the OBX setup:
http://www.1aauto.com/1A/CatalyticCo...oogle_base_api

It's all up to you now. All that I mentioned were merely my opinion.

 

The $5 was used to get the spark-plug non-foulers from autozone which I modified as per what the write-up from the other forum has instructed. But apparently, it did not work as it did for them.