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P0430

This is a discussion on P0430 within the General Help forums, part of the LSx Technical Help Section category; i got this code in my car. it says bank 2 which i think is the passenger side, but i ...

  1. #1
    boycott wal-mart
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    silver
    98 T/A WS6

    P0430

    i got this code in my car. it says bank 2 which i think is the passenger side, but i cant tell if its the o2 sensor or the cat. anyone have any advice?

  2. #2
    Just me Y2KPewterSS's Avatar
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    Pewter metallic
    2000 Camaro SS

    Bank 2 is the passenger side, and I am 95% sure that the 430 code is for the 02 sensor. I had that same code on my past vert like 8 times.
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  3. #3
    boycott wal-mart
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    silver
    98 T/A WS6

    thanks

    thanks bro, i will start with that.

  4. #4
    Just me Y2KPewterSS's Avatar
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    Pewter metallic
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    Quote Originally Posted by Semperfiws6 View Post
    thanks bro, i will start with that.
    Anytime

  5. #5
    Member 89LX's Avatar
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    Navy
    2000 Z28 M6

    P0430 Catalyst Sys Low Efficiency Bank 2

    HO2S, located in the exh sys past the 3-way cat converter, produces an output sig which indicates the 02 storage capacity of the catalyst. A P0430 Bank 2 indicates the 3-way cat capacity is below a threshold considered acceptable. The book says to check:
    //Verify the 3-way cat converter is originale equip part
    //Inspect cat converter for damage such as dents, severe discoloration caused by excessive heat, holes, etc
    //Insure that internal 3-way cat converter rattle caused by damage is not present
    //Inspect exhaust sys for leaks, damage, or loose/missing hardware in the area from the converter to the HO2S #2 primarily.
    //Insure that the HO2S #1 and #2 are secure and their pigtails and wiring are not damaged or contacting the exhaust.
    I did some exhaust work and my header (collecter) bolts were not properly torqued and was leaking. I jacked and blocked the right side. started car and went looking for a leak. Tightened the bolts leak checked again and reset the computer....code went away. Hope this helps
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  6. #6
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    You can also try swapping the rear 02's side to side, then see if it throws P0420 for the drivers side.

  7. #7
    Member bevenue's Avatar
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    Navy Blue Metallic
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    P0430 is for the right cat. (Catalyst system efficiency below threshold, right bank)
    GM is replacing them if its throwing P0430 (right) and/or P0420 (left).

    2002 'not a recall' letter?

    Those with "Catalyst low efficiency bank X" MIL's...

    Letter from GM about catalytic converter
    Last edited by bevenue; 01-30-2007 at 03:08 PM.
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  8. #8
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    Original poster has a '98.

  9. #9
    Member bevenue's Avatar
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    Navy Blue Metallic
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    Quote Originally Posted by 2001NBMZ28 View Post
    Original poster has a '98.
    warranty changed to 10 year or 120k miles. His '98 should be covered as far as the year. I don't know about the miles part he'll have to comment on that one.

  10. #10
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    I'm thinking the letter only applies to the 00-02 cars from what I've seen. Anyone with a pre-00 get the letter?

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    Member bevenue's Avatar
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    Navy Blue Metallic
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    Quote Originally Posted by 2001NBMZ28 View Post
    I'm thinking the letter only applies to the 00-02 cars from what I've seen. Anyone with a pre-00 get the letter?
    Ok, it might not apply to the '98s the letter I got from another member only says 2001.



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  12. #12
    boycott wal-mart
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    silver
    98 T/A WS6

    thanks

    so i guess im gonna change my cat. i had a feeling it was that anyway. i appreciate all the feedback from everyone. im off to find a cat.
    SemperFi

  13. #13
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    Red
    2000 WS6

    Quote Originally Posted by 2001NBMZ28 View Post
    You can also try swapping the rear 02's side to side, then see if it throws P0420 for the drivers side.
    Much wisdom in what is said above. I suggest you take your car to the Autohobby shop, swap the two O2 sensors, reset the PCM and see what code comes back. If it's the same code, you have a bad passenger side cat. If it comes back as a P0420 (as suggested above), you have a bad sensor. It's easy to do and afterward, you'll know exactly what the problem is and will avoid paying for parts you may not need.

    Semper Fi,
    Marc

  14. #14
    Member 89LX's Avatar
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    Yip

    The latter is sound advice. Sensor should be cheaper than the Cat. Easy to swap then over. If it is the same code you can leave then of course and go for the Cat.

  15. #15
    Member Bandit1's Avatar
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    black
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    call the dealer and ask them if ur model year is covered under the 10 yrs 120k miles im sure it is and than if so get it replaced for free...the cat converter if not slap some high flow aftermarket cats on there

  16. #16
    boycott wal-mart
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    i got too many miles

    Quote Originally Posted by Bandit1 View Post
    call the dealer and ask them if ur model year is covered under the 10 yrs 120k miles im sure it is and than if so get it replaced for free...the cat converter if not slap some high flow aftermarket cats on there
    ive got over 130000 on mine so im sure its over. high flow aftermarkets it is.

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    black
    2002 TA WS7

    nice

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