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Code P0420/P0430

Discussion in '2nd Gen. Tacomas (2005-2015)' started by zzyzx1, Jun 15, 2009.

  1. Jun 15, 2009 at 7:17 PM
    #1
    zzyzx1

    zzyzx1 [OP] Member

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    2005 4.0 Tacoma Code P0420/P0430; thought I had it beat with changing the mass air flow sensor, but after the truck cooled off i took it out again and the check engine light came on. So does it look like it is a bad cat, or O2 sensor?
     
  2. Jun 15, 2009 at 7:21 PM
    #2
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    Bad cats
     
  3. Jun 15, 2009 at 7:22 PM
    #3
    zzyzx1

    zzyzx1 [OP] Member

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    Does an '05 have 2 cats?
     
  4. Jun 15, 2009 at 7:22 PM
    #4
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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  5. Jun 15, 2009 at 7:22 PM
    #5
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    5100's all on fours
    Four if it is 4.0L
     
  6. Jun 15, 2009 at 7:25 PM
    #6
    zzyzx1

    zzyzx1 [OP] Member

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    I see the two after the header, where are the other two? Still can't find a replacement online either, is there a generic cat I can get? I think this is going to get expensive...
     
  7. Jun 15, 2009 at 7:28 PM
    #7
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    There are the two after the header and two after the last O2 sensor, sandwiching the tranny.

    They should still be under federal warranty. Have you take it back to or spoken with a dealer?
     
  8. Jun 15, 2009 at 7:36 PM
    #8
    zzyzx1

    zzyzx1 [OP] Member

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    I have an appointment for friday, hopefully they'll replace them. It looks like the first two cats are part of the header, I don't see a flange.
     
  9. Jun 15, 2009 at 7:37 PM
    #9
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    Yeah, you should have a sensor then cat then sensor then cat. The other side will be the same.
     
  10. Jun 15, 2009 at 7:41 PM
    #10
    zzyzx1

    zzyzx1 [OP] Member

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    Yup, thats the setup. So in order to replace the cats you have to replace the header as well huh? Man I hope it's warrantied or it's gonna be pricey.
     
  11. Jun 15, 2009 at 7:41 PM
    #11
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    5100's all on fours
    Very pricey.
     
  12. Jun 15, 2009 at 7:46 PM
    #12
    zzyzx1

    zzyzx1 [OP] Member

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    I'm thinking about a rear 02 sensor simulator, $80 vs. $2,000. crap...
     
  13. Jun 15, 2009 at 7:51 PM
    #13
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    The problem is if you cat(s) are clogged you will lose power.
     
  14. Jun 15, 2009 at 7:59 PM
    #14
    zzyzx1

    zzyzx1 [OP] Member

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    Power is good, with all the soot that's blown out of my tailpipe I doubt there's much left inside the cat to create an obstruction. I read the post you put up about the federal regulation governing emissions components so, hopefully they won't give me a ration of $*** about it, and just fix it.
     
  15. Jun 15, 2009 at 8:01 PM
    #15
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    They shouldn't. If they do try another dealership. If all else fails, call the magic corporate number.
     
  16. Jun 15, 2009 at 8:03 PM
    #16
    zzyzx1

    zzyzx1 [OP] Member

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    Thank's for the insight, I'll let you know how things go.

    Out...
     
  17. Jun 15, 2009 at 8:04 PM
    #17
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    Good luck
     
  18. Jun 16, 2009 at 7:54 AM
    #18
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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  19. Jun 20, 2009 at 5:14 PM
    #19
    zzyzx1

    zzyzx1 [OP] Member

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    Dealership replaced the cats/headers (one piece), no questions asked. I saw the total and it was nearly $2,000 for parts/labor, i'm glad it was warrantied. Thanks for all of the info....
     
  20. Jun 20, 2009 at 6:50 PM
    #20
    jrws6

    jrws6 Well-Known Member

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    Thats Awesome!

    Your lucky I have Heard the warranty on exhaust componets is 8years, or 80K miles.
     
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