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Cel help!!!

Discussion in '1st Gen. Tacomas (1995-2004)' started by El Taco, Oct 8, 2009.

  1. Oct 8, 2009 at 4:06 PM
    #1
    El Taco

    El Taco [OP] Well-Known Member

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    Posted this on TTORA as well. Hope to get as much input from y'alls on this as possible.

    Truck is a 2001 Taco Prerunner V6 auto with 157K.

    Wayyyyy back when, it threw a P0420. Kept going on/off because I kept removing the neg wire to set turn it off.

    Then, being a cheap-ass, thought the O2 sims would help so I bought a URD O2 sensor sim. Installed that and ran OK for about 400 miles then a P0136 came up. Now, without the sensor sim and running as stock, I'm constantly getting the P0136, kept resetting the CEL by removing the neg wire on battery. Strangely, for the last 800 miles, ran CEL free.

    Could it be that I fucked up the wiring when installing/uninstalling the URD O2 sim?

    OR

    Could it just be a bad sensor?

    OR

    Could it be a bad CAT?

    *note* my exhaust smells disgusting, like my bike because bikes don't got no sensors.

    thanks y'alls.
     
  2. Oct 8, 2009 at 4:11 PM
    #2
    dublduty

    dublduty Member

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    Cat could be plugged for sure, especially if your getting a heavy odor out the exhaust. Yota's dont like other sensors but oems in my opinion...but some would argue.
     
  3. Oct 8, 2009 at 4:18 PM
    #3
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    Sounds like an issue with the O2 sim. Also, check for exhaust leaks.
     
  4. Oct 8, 2009 at 4:20 PM
    #4
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    The ECU thinks the sensor isn't there. Check you connections again.
     
  5. Oct 8, 2009 at 4:40 PM
    #5
    4WD

    4WD cRaZy oLdmAn

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    Exhaust smells like rotten eggs or worse ?? Sounds like a bad Catalytic (or 2)...:cool:
     
  6. Oct 8, 2009 at 4:48 PM
    #6
    El Taco

    El Taco [OP] Well-Known Member

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    well, i don't have the sim on anymore, not for about 1K miles.

    i understand that it can be a bad CAT or the sensor itself, tryin' to work something out with Steve (Gadget) from URD.

    any other suggestions???
     
  7. Oct 8, 2009 at 4:55 PM
    #7
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    Either a faulty O2 sensor, or an exhaust leak.
     
  8. Oct 8, 2009 at 5:00 PM
    #8
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    x2
     
  9. Oct 8, 2009 at 6:01 PM
    #9
    El Taco

    El Taco [OP] Well-Known Member

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    alrighty, i'll try testing out both theories.

    but how the hell am i supposed to test the exhaust for leaks?

    any clever ideas of how to test it out other than the waiting for a cold day to see where it may potentially be leaking from?
     
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