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Threw a code???

This is a discussion on Threw a code??? within the Computer & Tuning forums, part of the LSx Technical Help Section category; I've got 1999 SS with only 15k miles and it is totally stock. Last night my check engine light came ...

  1. #1
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    99 Camaro SS Convertible

    Threw a code???

    I've got 1999 SS with only 15k miles and it is totally stock. Last night my check engine light came on with a P0420 code which is "bank 2 cat below threshold"

    I hear people get that code with aftermarket cats and or long tubes.

    Any guesses as to why I'm getting that totally stock and low miles?

    Thanks

  2. #2
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    I'd just clear it first and see if it returns. Usually it's the cat failing but can also be the postcat 02 sensor. P0420 is bank 1 (drivers side) and P0430 is bank 2 (passenger side).

  3. #3
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    2000 Trans Am

    I have both 430 and 420, is there a way to delete theese?

  4. #4
    sick & twisted SS 02_slp_ss's Avatar
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    Quote Originally Posted by SVG210 View Post
    I have both 430 and 420, is there a way to delete theese?
    yea clear the codes with a code reader. if you dont have 1 a local autozone or advanced will do it

  5. #5
    Senior Member Too Fast's Avatar
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    Well, those codes will return, if you clear them. They are for faulty catalytic convertors, these codes only will show up after the PCM verifies the O2 sensors are ok. It only means your convertors are not cleaning the exhaust good enough. I believe GM has a warranty for our convertors up to 10 years as long as mileage is under 100k, so to the OP your are probably out of luck for free replacements.

  6. #6
    Senior Member mrr23's Avatar
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    dark bowling green
    2000 corvette

    the cats are under warranty for 8 years 100k miles. don't clear the codes. take it into a dealership and have them fix it for free.

  7. #7
    Member nillam1's Avatar
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    Quote Originally Posted by mrr23 View Post
    the cats are under warranty for 8 years 100k miles. don't clear the codes. take it into a dealership and have them fix it for free.
    He has a 99, 10 yrs old.

  8. #8
    Member nillam1's Avatar
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    Quote Originally Posted by Too Fast View Post
    Well, those codes will return, if you clear them. They are for faulty catalytic convertors, these codes only will show up after the PCM verifies the O2 sensors are ok. It only means your convertors are not cleaning the exhaust good enough. I believe GM has a warranty for our convertors up to 10 years as long as mileage is under 100k, so to the OP your are probably out of luck for free replacements.
    is it 10 or 8 yrs?

  9. #9
    Member nillam1's Avatar
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    2002 Camaro Z28

    found this is it only o1 and 02 cars?


    Campaign - Catalytic Converter Warranty Extension
    Subject:
    Special Coverage Adjustment - Catalytic Converter Extended Warranty
    # 05513 - (11/27/2006)

    Models:
    2000-02 CHEVROLET CAMARO
    2000-02 PONTIAC FIREBIRD

    EQUIPPED WITH 5.7L V8 (RPO LSI - VIN G) ENGINE

    Condition

    Some customers of 2000-02 Chevrolet Camaro and 2000-02 Pontiac Firebird model vehicles, equipped with a 5.7L V8 (RPO LSI - VIN G) engine, may experience a failure of the left or right catalytic converter.

    Special Coverage Adjustment

    This special coverage covers the condition described above for a period of 10 years or 120,000 miles (193,000 km), whichever occurs first, from the date the vehicle was originally placed in service, regardless of ownership. The repairs will be made at no charge to the customer.

    For vehicles covered by Vehicle Service Contracts, all eligible claims with repair orders on or after November 27, 2006 are covered by this special coverage and must be submitted using the labor operation codes provided with this bulletin. Claims with repair orders prior to November 27, 2006 must be submitted to the Service Contract provider.
    __________________

  10. #10
    Senior Member Too Fast's Avatar
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    If it is 10 years for a 1999, he better get his ass to the dealer pronto for the free convertor(s)! And yes, do not clear the code before showing up.

  11. #11
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    The 10/120 extended warranty only applies to the 00-02 LS1 F cars. Original federal emissions warranty was 8/80 on cats and PCM.

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