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Try and figure this one out? CEL on for 3 months

Discussion in '2nd Gen. Tacomas (2005-2015)' started by rock4200, Aug 18, 2008.

  1. Aug 18, 2008 at 9:03 PM
    #1
    rock4200

    rock4200 [OP] Active Member

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    First let me say I have taken the Truck to Toyota and they do not know what is wrong with it!!!

    Now with that said. I have 2005 6spd toyota tacoma TRD pckg V6 92,000 miles on her. CEL came on about 3 months ago it is reading a p0173 code. I replaced the MAF I replaced the heated oxygen sensor ( above the cat converter)all with OEM parts. CEL light still on. I have had it two mechanics, they couldn't find the problem. I broke down took it to Jerry's Toyota In MD they had it told me they could not figure it out, the gas smelled week. They told me two run a higher grade of fuel then wanted to charge me 95.00 ha ha I told them to eat $h%t. So i was on my second tank of higher grade fuel, when the light went off for 1 day and then came back on and stayed on. It is bogging a little when I am in 3 or 4th gear accelerating then runs fine when she catches up. any thoughts?
     
  2. Aug 18, 2008 at 9:09 PM
    #2
    tacomaman06

    tacomaman06 Carolina Alliance: Enforcer

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    getting there....
    just curious if you have a cold air intake?? try cleaning the maf sensor!! also......its possible that one of the spark plugs may be cracked, or that you may have a cat. converter thats starting to fail. try cleaning the maf sensor first.
     
  3. Aug 18, 2008 at 9:23 PM
    #3
    rock4200

    rock4200 [OP] Active Member

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    already did that now I also put a brand new one in there and no just OEM intake
     
  4. Aug 18, 2008 at 9:28 PM
    #4
    tacomaman06

    tacomaman06 Carolina Alliance: Enforcer

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    getting there....
    thats a tough one man!!!
     
  5. Aug 18, 2008 at 11:13 PM
    #5
    Janster

    Janster Old & Forgetful

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    If your gas cap tight?

    Stranger things have happened....
    I know on the 1st gen trucks, a loose gas cap sets off a CEL sometimes.
     
  6. Aug 18, 2008 at 11:45 PM
    #6
    dustin19d

    dustin19d Well-Known Member

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    So what does p0173 mean?
    That might explain it.

    If not, break the light, change the oil and drive her another couple hundred thousand miles.

    I mean seriously If Toyota doesn't know whats wrong with it WTF! they built it right?
     
  7. Aug 18, 2008 at 11:48 PM
    #7
    Swwacoma

    Swwacoma Doomsday Squad

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    Long shot but if you're ecu/ecm is starting to go a little crazy it can say its a MAF malfunction. Happened in my 03 corolla as well as my brothers 07 corolla (possibly just a corolla thing, but it sounds similar).
     
  8. Aug 19, 2008 at 12:22 AM
    #8
    genxer36

    genxer36 Lord of Tomfoolery

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    P0173 - Powertrain: Fuel Trim Bank 2



    What about disconnecting the battery for a little while & reconnecting? Doesn't this reset the ecu?

    Found this info on Google:

    "Usually P0170 and P0173 mean your Mass Air Flow Sensor took a crap. However, it can also be caused by vacuum leaks, etc."


    "P0170 (right bank)& P0173 (left bank) are fuel trim codes.
    Check for vacuum leaks, air intake leaks (air cleaner tube), incorrect fuel pressure, bad fuel pressure regulator or faulty injectors. "

    Technical questions:
    http://204.16.221.2/direct/view/.ef2398d/203
     
  9. Aug 19, 2008 at 5:47 AM
    #9
    rock4200

    rock4200 [OP] Active Member

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    I am starting to think it is an injector problem , like said the MAF is new from toyotA. i ALSO HAVE RESET THE LIGHT 6 OR 7 TIMES USUALLY COMES BACK ON AFTER 20 MILES OR SO
     
  10. Oct 11, 2008 at 11:38 AM
    #10
    rock4200

    rock4200 [OP] Active Member

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    Ok, follow-up CEL light is still on
    but could I be getting this code from the cat converter I now notice a deep like humming sound when I start the truck up and accelerate and it is still bogging when I accelerate. Maybe Toyota missed that the converter was going up? anything else?
     
  11. Oct 11, 2008 at 11:49 AM
    #11
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    Is that the ONLY code your getting?
    That code is quite common for a bad MAF. Being as you said you have a new one, Im not sure what else it could be. Did you check all the vaccume lines? :confused:
     
  12. Oct 11, 2008 at 12:58 PM
    #12
    rock4200

    rock4200 [OP] Active Member

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    I can't seem to find a vacuum leak anywhere
     
  13. Oct 11, 2008 at 6:09 PM
    #13
    Marc M

    Marc M Dirty White Boy

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    Had to have both front cats replaced on my '05 when the truck only had less than 30,000 miles on it. That meant both manifolds and cats.

    Marc M
     
  14. Oct 11, 2008 at 9:07 PM
    #14
    TexasJay

    TexasJay If..Then..Else

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    I don't know if this applies to Tacoma's but I had the same problem on an old chevy truck I owned many moons ago. It didn't have a CEL, but would bog down every time I tried to give it gas.

    Several mechanics looked at it and I had them tell me everything from I need a new transmission to new heads.

    Turned out to be a fuel filter. It was restricting flow to the engine and it would starve the engine of fuel.
     
  15. Oct 11, 2008 at 9:16 PM
    #15
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    That very well could be the issue. Not sure if it would throw a code. :confused:
     
  16. Oct 12, 2008 at 4:39 AM
    #16
    TicTacOma

    TicTacOma UnderWater Monopoly Champion

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    It's all in my head at the moment...
    Is the new MAP sensor any good? Stranger things have happened.
     
  17. Oct 12, 2008 at 5:11 AM
    #17
    rock4200

    rock4200 [OP] Active Member

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    I have a new MAF not a MAP
     
  18. Oct 12, 2008 at 6:56 AM
    #18
    TicTacOma

    TicTacOma UnderWater Monopoly Champion

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    It's all in my head at the moment...
    ok, is the new MAF bad? Never answered the question even though it was wrong but you knew what I meant.


    Do the ol' Electrical Tape mod and you'll be able to sleep better, I know I will.
     
  19. Oct 12, 2008 at 7:31 AM
    #19
    rock4200

    rock4200 [OP] Active Member

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    yeah sorry no it is good I have checked, plus it went to Toyota after I installed the new MAF. Thanks for the info
     
  20. Oct 12, 2008 at 7:36 AM
    #20
    RoyB

    RoyB Well-Known Member

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    a vacuum leak should give a bad idle and shouldn't really cause the bogging down when at speed. A clogged cat should come up as a cat inefficient code. Perhaps the wiring TO the maf? Can you run the car with the MAF unplugged? See if it changes driving character. I know on GM cars you can unplug it and it will go to default tables (and obviously throw a code).

    What does gas smelling weak mean?
     
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