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LOOK!! header/CEL question

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Old 03-22-2009, 10:05 PM
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Exclamation LOOK!! header/CEL question

so i have a full exhaust set up...i have Cobalt Addiction V2 header, vibrant downpipe with high flow cat,twin race mufflers....after i installed the set up, i got a CEL (check engine light). i bought a code reader and it read 0420.. i clear the code, but it comes up every day or two.my question......i put header wrap on...did it right and didn't allow too much over-wrap...do you think the wrap is why the code keeps appearing even thoug i have a cat... any suggestions???

thanks

Last edited by kevinj4891; 03-22-2009 at 10:06 PM. Reason: typo
Old 03-22-2009, 10:06 PM
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no, the high flow cat throws the code. I have the issue on my car too.

Get a CEL eliminator or turn it off in HP tuners. Or do what I do and ignore it
Old 03-22-2009, 10:07 PM
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what does the code read? don't feel like searching...i mean the description, not the numbers
Old 03-22-2009, 10:07 PM
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How did you install a Vibrant downpipe on a CA header?
Old 03-22-2009, 10:10 PM
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Welders make it happen.
Old 03-23-2009, 12:21 PM
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Originally Posted by slowswap
How did you install a Vibrant downpipe on a CA header?
why? should there have been a problem.. they had a deal around christmas and i had to buy...everything matches up fine.The V2 header is a "shortty" and the vibrant d/p is kinda long..connects to stock resonator perfectly

Originally Posted by chris88z24
no, the high flow cat throws the code. I have the issue on my car too.

Get a CEL eliminator or turn it off in HP tuners. Or do what I do and ignore it
what kind of "eliminator"? i tried the one from ARK and it didn't work. the spacer is too big and it wont allow the O2 sensor to go on cuz it hits the frame rail...no go. i got a spark plug non fouler and tried it..still get the code.

Last edited by kevinj4891; 03-23-2009 at 12:21 PM. Reason: Automerged Doublepost
Old 03-23-2009, 12:33 PM
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The Vibrant downpipe is shorter then a regular downpipe.
Old 03-24-2009, 10:59 AM
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then the V2 header must be a little longer. plus, i dont know if you guys realize, but i have a 2.4L everything fits perfect
Old 03-24-2009, 12:20 PM
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Exhaust are the same between L61, LE5 and LSJ.
Old 03-24-2009, 12:24 PM
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well, all i know is that it fits..


BACK TO TOPIC

anyone have an idea?
Old 03-24-2009, 12:55 PM
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high flow cat = CEL

If nothing else has worked you will have to turn it off with HPTuners.
Old 03-24-2009, 12:58 PM
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the po420 is for low catalyst efficiency or something similar to that. it's because of the hi flow cat. very common.
Old 03-25-2009, 10:57 AM
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alright...thanks...

its time to save up money and go for the trifecta...more power, eliminate code, and WOT!!!!!!
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