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Thread: P0420 & p0430

  1. 05-25-2010, 06:16 AM #1
    my1stss
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    P0420 & p0430

    I just bought a 2001 SS two days after bringing it home the check engine light came on, my hubby gutted the clogged converters and changed four o2 sensors. He reset codes with code reader and i cant get rid of P0420 and P0430, my question is will they stay on as long as the converters are gutted? Do i need to have them on the car to get the light to go away to go through NJ inspection? Can anyone help?
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  2. 05-25-2010, 06:33 AM #2
    Spaz
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    Quote Originally Posted by my1stss View Post
    I just bought a 2001 SS two days after bringing it home the check engine light came on, my hubby gutted the clogged converters and changed four o2 sensors. He reset codes with code reader and i cant get rid of P0420 and P0430, my question is will they stay on as long as the converters are gutted? Do i need to have them on the car to get the light to go away to go through NJ inspection? Can anyone help?
    welcome to the site... you'll need to either buy 02 sims for the rears or have them tuned off...
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  3. 05-25-2010, 06:36 AM #3
    35th-ANV-SS
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    Quote Originally Posted by Spaz View Post
    welcome to the site... you'll need to either buy 02 sims for the rears or have them tuned off...
    OK I was correct. I just replied in another thread in a different section that the OP started...
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  4. 05-25-2010, 04:38 PM #4
    importhater81
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    buy new cats or get the rear O2's tuned out.Simulator's are a waste of money.

    There is a policy through G.M. were they extended the warranty on convertors that may apply to your car,depending on mileage,but the dealer is not going to warranty them if they've been gutted out.
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  5. 05-27-2010, 06:55 AM #5
    my1stss
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    Thanks guys, I bought new cats I thought that it may be best to keep it the way it is supposed to be I guess. Now hopefully once they are installed and the computer is reprogrammed it will be ready for inspection!
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  6. 05-27-2010, 07:02 AM #6
    shady milkman
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    Quote Originally Posted by my1stss View Post
    Thanks guys, I bought new cats I thought that it may be best to keep it the way it is supposed to be I guess. Now hopefully once they are installed and the computer is reprogrammed it will be ready for inspection!
    yup if you dont plan on doing much with your car..keep the cats.
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  7. 05-27-2010, 07:10 AM #7
    Smittro
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    Quote Originally Posted by my1stss View Post
    Thanks guys, I bought new cats I thought that it may be best to keep it the way it is supposed to be I guess. Now hopefully once they are installed and the computer is reprogrammed it will be ready for inspection!
    Welcome to ls1.com..

    The codes for the rear o2's will turn off/clear on thier own after a few start/run cycles...
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  8. 05-27-2010, 07:11 AM #8
    my1stss
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    Yea I dont plan on it really, its plenty fast for me. Now husband on the other hand....mite try and add a few things, lol. Thanks guys!
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  9. 05-27-2010, 07:12 AM #9
    shady milkman
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    Quote Originally Posted by my1stss View Post
    Yea I dont plan on it really, its plenty fast for me. Now husband on the other hand....mite try and add a few things, lol. Thanks guys!
    you better tell him to keep his hands off of it .
    mods- suncoast creations hood with functional lt1 style airbox, ls6 intake, QTP longtube headers, QTP ORY, UMI SFC, Adj. LCA with relo brackets, UMI adj. panhard bar, Koni SA and strano springs,Torq Thrust M 17s 9.5 and 10.5 with nitto 555Rs, tuned by Frost
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  10. 05-27-2010, 08:25 AM #10
    Spaz
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    Quote Originally Posted by my1stss View Post
    Yea I dont plan on it really, its plenty fast for me. Now husband on the other hand....mite try and add a few things, lol. Thanks guys!
    wait... i changed my mind on the answer... you'll need an APS twin turbo kit... after that is installed and tuned everyything should be fine...


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  11. 05-27-2010, 09:40 AM #11
    35th-ANV-SS
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    Quote Originally Posted by Spaz View Post
    wait... i changed my mind on the answer... you'll need an APS twin turbo kit... after that is installed and tuned everyything should be fine...
    I know you're messing around, but APS turbo kits have MAJOR problems with their head units. They are off-shored now and are produced in China. They have problems with cracking with heat. As far as I know, they stopped manufacturing the turbo kits for the LS1 due to this problem. That was about 6 months ago or so. Not sure what has changed since then, if anything.
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  12. 05-27-2010, 10:04 AM #12
    my1stss
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    Its all good I know they are gonna mess wit me cause I'm a chick and I dont know much!
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  13. 05-27-2010, 10:05 AM #13
    my1stss
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    I went with new converters they will be here tomorrow, thanks though!
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  14. 05-27-2010, 10:24 AM #14
    Spaz
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    Quote Originally Posted by my1stss View Post
    I went with new converters they will be here tomorrow, thanks though!
    check out the eastern section too... i have a sticky in there "ls1 picnic" that you and you hubby could chow up for...
    Last edited by Spaz; 05-28-2010 at 08:30 AM.
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  15. 05-28-2010, 04:48 AM #15
    shady milkman
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    Quote Originally Posted by Spaz View Post
    check out the easter section too...
    omg i love peeps


    just had to give you a hard time ryan
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  16. 05-28-2010, 08:30 AM #16
    Spaz
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    Quote Originally Posted by shady milkman View Post
    omg i love peeps


    just had to give you a hard time ryan

    damn you!!!
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  17. 06-01-2010, 12:31 PM #17
    Marc 85Z28
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    You should have inquired about the codes BEFORE hacking up the converters. GM would have replaced them for FREE.
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  18. 06-01-2010, 04:02 PM #18
    DaddySS
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    Be sure to do full driving cycles after you replace the cats - if you do a search there's a write up on GM driving cycles. The system needs to read ready in order to pass inspection.
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