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96 taco 2.7 p0420 cat code

Discussion in 'Technical Chat' started by 1BadComa, Feb 8, 2010.

  1. Feb 8, 2010 at 12:19 PM
    #1
    1BadComa

    #1
    1BadComa [OP] Member

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    Buddie
    Virginia
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    3" body lift 33" bf goods fender flares
    head gasket was just replaced...the truck sat a year and a half... does anyone think this code could be caused by coolant in the combustion chamber maybe gummed up a o2 sensor? or just sitting and not being driven??
     
    1BadComa, Feb 8, 2010
    #1
  2. Feb 8, 2010 at 12:21 PM
    #2
    98tacoma27

    #2
    98tacoma27 is going full "SANDWICH" Moderator

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    Some stuff. Not a lot, just some.
    It's possible. It can be caused by a number of things actually.

    Bad AFR (front O2 sensor), exhaust leak(s), bad rear O2, vacuum leak, cracked exhaust header/manifold
     
    98tacoma27, Feb 8, 2010
    #2
  3. Feb 8, 2010 at 12:24 PM
    #3
    1BadComa

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    1BadComa [OP] Member

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    3" body lift 33" bf goods fender flares
    cool, thanks I dont think the rear 02 was ever replaced...I replaced the front about 2 years ago...really hope it isnt a cat problem
     
    1BadComa, Feb 8, 2010
    #3
  4. Feb 8, 2010 at 12:47 PM
    #4
    98tacoma27

    #4
    98tacoma27 is going full "SANDWICH" Moderator

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    Some stuff. Not a lot, just some.
    Do you have to worry about emissions? Smog test? I have seen a few guys recently get aftermarket CATs through rockauto.com that seem to work.

    URDUSA.com also makes an O2 simulator that tricks the ECM into thinking the CAT is good (no CEL light either)
     
    98tacoma27, Feb 8, 2010
    #4
  5. Feb 11, 2010 at 7:51 AM
    #5
    1BadComa

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    1BadComa [OP] Member

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    3" body lift 33" bf goods fender flares
    yeah unfortunantly i have the emissions and smog tests and my tags die in two months.. but thanks for the helpful info...ill def be checking into it..
     
    1BadComa, Feb 11, 2010
    #5

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