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Check engine light help

Discussion in '2nd Gen. Tacomas (2005-2015)' started by crazyengineer, Mar 13, 2011.

  1. Mar 13, 2011 at 8:42 AM
    #1
    crazyengineer

    crazyengineer [OP] Well-Known Member

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    My check engine light came on today, i got it checked at an auto parts store
    the reading taken on it said that the catalyst system is working at a very low efficiency

    any ideas on what i can do to fix it

    i am approaching 100,000 miles, and i have 500 miles till next oil change
     
  2. Mar 13, 2011 at 2:41 PM
    #2
    crazyengineer

    crazyengineer [OP] Well-Known Member

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    does anyone has an ideas for me?
     
  3. Mar 13, 2011 at 2:42 PM
    #3
    SmilingMark

    SmilingMark Well-Known Member

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    The code # would help. Generally, first thing I do is clear the code and see if it comes back.
     
  4. Mar 13, 2011 at 2:44 PM
    #4
    crazyengineer

    crazyengineer [OP] Well-Known Member

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    second time i have had it come on, cleared it the first time, came back on about 6 weeks (unsure on time, maybe 3) later
    same thing was read
    i dont have a code number, but i can get one
     
  5. Mar 13, 2011 at 2:51 PM
    #5
    SmilingMark

    SmilingMark Well-Known Member

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    if the same code comes back, odds are something is definately amiss. WhipperSnapper is probably right with a Cat problem.
     
  6. Mar 13, 2011 at 2:58 PM
    #6
    crazyengineer

    crazyengineer [OP] Well-Known Member

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    cat?
    sorry, i dont know enough about engines and what not (i am slowly learning, figuring things out myself)

    i have been told there is a decent chance my injectors are clogged and that is setting it off
    any chance that could be it?
     
  7. Mar 13, 2011 at 3:06 PM
    #7
    SmilingMark

    SmilingMark Well-Known Member

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    http://en.wikipedia.org/wiki/Catalytic_converter

    Part of your emission control system.

    Problem with these emmision control systems is that sometimes the problem is hard to pin point with just a single code, you could hope it's just dirty injectors, but I doubt it.
     
  8. Mar 13, 2011 at 3:45 PM
    #8
    crazyengineer

    crazyengineer [OP] Well-Known Member

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    i have had the same guy (that told me it was probably my injectors) tell me that the catalytic converter is just fine, said not to let anyone tell me otherwise

    though, i dont know the guy so i have no idea
    is there a way for me to get it checked?

    also, i have put additive into my gas that is supposed to clean the injectors and what not
    i have sea foam that i can use too (most likely next tank)
     
  9. Mar 14, 2011 at 4:33 AM
    #9
    Wattapunk

    Wattapunk Stay lifted my friends !

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    The easiest thing to do first is a visual check of things. Visually inspect the exhaust system for leaks, check the catalytic converter for dents, holes, severe discoloration, and check for a rattle inside. Then check the wiring to your O2 sensors. There's a chance you have a bad O2 sensor.
     
  10. Mar 14, 2011 at 5:57 AM
    #10
    crazyengineer

    crazyengineer [OP] Well-Known Member

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    ok, Judging by what i know, i really doubt it it is the catalytic converter since it is telling me the Catalyst system for the Fuel system, and not for the exhaust system. but hey, i may be wrong, if i am, please correct me
     
  11. Mar 14, 2011 at 6:10 AM
    #11
    Wattapunk

    Wattapunk Stay lifted my friends !

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    Gas cap tight?
     
  12. Mar 14, 2011 at 6:12 AM
    #12
    KPT

    KPT sees what you did there.

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    What is the actual code number?
     
  13. Mar 14, 2011 at 7:56 AM
    #13
    rb11701

    rb11701 Oh yeah!

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    100k, o2 sensor?
     
  14. Mar 14, 2011 at 8:00 AM
    #14
    HondaGM

    HondaGM Roll Tide

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    is it P0420 Catalyst System Efficiency Below Threshold (Bank 1)
     
  15. Mar 14, 2011 at 8:26 AM
    #15
    crazyengineer

    crazyengineer [OP] Well-Known Member

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    if i remember correctly (i may be wrong), that is what it is, though i am not sure about the code
     
  16. Mar 14, 2011 at 11:16 AM
    #16
    SmilingMark

    SmilingMark Well-Known Member

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    P420 means the o2 sensors before and after the catalytic converter are reading similar. This means one of 3 three things:

    Before sensor bad,
    After sensor bad,
    catalytic converter bad.

    To the OP, first request was for the code number. You come here asking for advice, the sumarily dismiss it because you know better even though you didn't even know what a catalytic converter was.

    If it's P420 (and wasn't the OP that posted this), it's more than likely either O2 sensors, or the convertor. Feel free to dismiss this as you already have. At 100K, I'd be willing to place a wager on a bad o2 sensor.
     
  17. Mar 14, 2011 at 4:29 PM
    #17
    crazyengineer

    crazyengineer [OP] Well-Known Member

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    i haven't heard it referred to as cat
    i know what a catalytic converter is

    i will be getting it checked when i get oil changed (after i get truck back from body shop)
     
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