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P430 Error / Cat Question.

Discussion in '2nd Gen. Tacomas (2005-2015)' started by Vlaude, Jan 8, 2012.

  1. Jan 8, 2012 at 11:12 AM
    #1
    Vlaude

    Vlaude [OP] Member

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    OK, the check engine light comes on and my handheld says its a P430. I reset it and it comes back on. I take it in they say its the cat. So they replace two cats, reset the light and send me on my way... About 30 miles later and check engine light comes back on. Then I check the O2 sensors. So $600 plus for the first cats and more for the O2's and the check engine light is still on! :mad: :confused:

    Now they are telling me $3,000 to replace additional front 2 cats... I'm done with it. No guarantee that will keep the light off. I just want the light off to pass inspections. Not dumping $3,000 into a truck that is running fine and doesn't appear to be polluting any more than the average car on the road. Any ideas how to get the check engine light off? Looking at using spark plug defoulers to pull the O2 sensors back out of the pipe a bit. Anyone had luck with this? Or any other ideas? Is an 02 sim another option, or better option? Thanks!
     
  2. Jan 8, 2012 at 11:16 AM
    #2
    Night

    Night Well-Known Member

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    Banks Monster Exhaust, aFe ProGuard 7, 3M Film, UnderCoating, alpine 920 headunit, alpine 6.5 components, 20% tint all around, JL Stealthbox, PDX-V9 Amp, Avid Lightbar, Avid Sliders, Full Metal JackRabbit Tonneau, TRD S/C
    Are you still under Emissions Warranty?
     
  3. Jan 8, 2012 at 12:06 PM
    #3
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    is the code a P0430, or P430?
     
  4. Jan 8, 2012 at 12:20 PM
    #4
    dantastic

    dantastic Well-Known Member

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    Sounds like you're being taken for a ride. How many miles do you have on your truck? Any engine mods? The O2 sensors usually go bad well before the cats and can cause a the same P0430 code.
     
  5. Jan 8, 2012 at 12:53 PM
    #5
    Night

    Night Well-Known Member

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    Isn't P0430 covered by emissions warranty?
     
  6. Jan 8, 2012 at 1:19 PM
    #6
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    They should be
     
  7. Jan 9, 2012 at 7:26 PM
    #7
    Vlaude

    Vlaude [OP] Member

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    Sorry, been running... I believe it is a P0430. I was told Cats. But hasn't fixed it. The truck is an 06 TRD with 130K on it. So out of any warranty. I'm going to go double check the code.
     
  8. Jan 11, 2012 at 10:41 PM
    #8
    YotaTaco

    YotaTaco Active Member

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    Bilstein 5100s 1.75" Centric Rotors Hawk HPS Pads Dynamat All Doors
    Vlaude ~ try this link: http://www.ncttora.com/fsm/05+/data/ileaf/06toyrm/06toypdf/06rmsrc/rm2006ta/0050034.pdf

    If the code is a P0430, it's the exhaust manifold (3-way cat) which is at the front, not the rear cats and it has nothing to do with the O2 sensors if the codes are not being thrown for an O2 sensor (in my experience). I've attached a picture for reference. The red circles are the parts I'm assuming the dealer replaced on your truck??? The yellow are the two front cats that go into the manifold. The code throwing could be caused by a few things that were either free or cheaper and easier to fix. Before taking it back to the dealer for anymore work, check to see if you have leaks in the exhaust system around the cats circled in yellow. Air leaks or gas leaks will cause the CEL to come on. Drive it around for about 5 mins. and check the tailpipe to see if it's condensation (normal) dripping or if it a mixture of gas and condensation (not normal). If there's a mixture, it's a leak somewhere in the system. If it's not that, try the A/F sensor. If it's not that, check the O2 sensors. Again, if it's not throwing the codes, I don't believe it would be those... Final fix is changing the manifold. Another "trusted" mechanic should be able to do it so much cheaper than the dealer.

    IMO, a good dealer would've checked all of this before replacing anything that didn't have to do with that code. If it were me, I would take it back to the dealer with these sheets (because this is part of the actual service manual) and have a few nice words with the GM. :argue: :evil:
    Make them show you what tests they performed and why they decided to change the rear cats when the service manual shows that's not the problem. Damn stealerships! :facepalm:
     
  9. Jan 11, 2012 at 10:44 PM
    #9
    YotaTaco

    YotaTaco Active Member

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    Bilstein 5100s 1.75" Centric Rotors Hawk HPS Pads Dynamat All Doors
    :worthless:

    Picture attached.....

    07 Taco Underside.jpg
     
  10. May 24, 2012 at 1:56 AM
    #10
    FAQdaWorld

    FAQdaWorld Member

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    Sorry to revive this but....


    My 05 v6 threw the p0430 code. I've cleared it with hand held but it comes right back. I am actually overdue for my emissions test (last month, stupid state no longer sends mail notification that registration is expiring). My state supposedly does odbII test but in the past I've taken it in and they just put the sniffer in and wave me through without bothering with the odb bit. I'm pretty sure I can squeak my way through emissions the way I am now (if not I've got some other tricks of the trade :p)

    My question is: I'm thinking about getting DT long tubes and the o2 simulators. Assuming the possibility that I have a bad cat which if I'm reading everything correctly would have been one of the upper manifold cats which are deleted with the DT long tubes will I still need to replace the upstream sensor driver side? I know this isnt legal for street use so no lectures please.

    **Hey Folks, heres an update if anyone cares :p

    In delaware they dont yet do ODBII testing on the vehicle (at least not in my county), so all I had to do was pass the sniffer test. I used my scan tool and determined at least in my opinion that the second oxygen sensor is faulty using the test procedures from the manual. Because of this i figured that the CAT is probably still good and took a chance and just went through emissions. Passed with flying colors. I think rather than replacing the second sensor i'm just gonna save a bit more money and buy the dt headers :D
     
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