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p0031 and p2238 were both pulled up on my truck??????????????

Discussion in '1st Gen. Tacomas (1995-2004)' started by 04coma, Oct 17, 2009.

  1. Oct 17, 2009 at 1:28 PM
    #1
    04coma

    04coma [OP] Well-Known Member

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    04 trd offroad sr5 prerunner debadged
    air aid intake and throttle body spacer billet grill clear corner lights and 3rdbrake decal "coma" :)
    help please? i know what the codes are for but dont know which to fix. or how to test them ive got some printouts from autozone but in need of tacoma tech advice :)
     
  2. Oct 17, 2009 at 4:29 PM
    #2
    tacomaman06

    tacomaman06 Carolina Alliance: Enforcer

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    getting there....
    if im not mistaken, p0031 is the code for the upstream heater circuit sensor......bank1 sensor1...........i just had my cel go off, and thats the one i got. replaced the sensor, and its good now. i gotta find out what the ohter code is.
     
  3. Oct 17, 2009 at 5:14 PM
    #3
    kevhogaz

    kevhogaz Low Speed, High Drag

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    Looks pretty simple to me. You need an Air Flow Meter/Sensor.
     
  4. Oct 17, 2009 at 7:07 PM
    #4
    ETaco23

    ETaco23 Marshall offroad Fabrication

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    Is it true that these should be changed every 60-90K miles or so? Or just when they throw a CEL?
     
  5. Oct 17, 2009 at 7:25 PM
    #5
    kevhogaz

    kevhogaz Low Speed, High Drag

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    Mine made it about 130K before it needed replaced. We only replace 'em at work when they fail.
     
  6. Oct 17, 2009 at 7:29 PM
    #6
    ETaco23

    ETaco23 Marshall offroad Fabrication

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    ok, but what if my mileage gets/is crappy. could the sensor be going bad?
     
  7. Oct 17, 2009 at 7:31 PM
    #7
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    Yes.
     
  8. Oct 17, 2009 at 7:34 PM
    #8
    ETaco23

    ETaco23 Marshall offroad Fabrication

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    There he is! lol..
    K, I think I will look into getting one soon and changing it. Thanks!
     
  9. Oct 17, 2009 at 8:02 PM
    #9
    04coma

    04coma [OP] Well-Known Member

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    air aid intake and throttle body spacer billet grill clear corner lights and 3rdbrake decal "coma" :)
    ok but do i need to replace both, or would i be able to just replace the mafs? why is it giving me the code for the o2 sensor and the mafs??
     
  10. Oct 17, 2009 at 8:02 PM
    #10
    tacomaman06

    tacomaman06 Carolina Alliance: Enforcer

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    getting there....
    yep....there he is.




    good idea to replace when needed(by cel), but good idea to replace sooner to save mileage. my cel went off at right under 60k miles....replaced it...good to go.
     
  11. Oct 17, 2009 at 8:03 PM
    #11
    tacomaman06

    tacomaman06 Carolina Alliance: Enforcer

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    getting there....
    replace the o2 sensor first, and clean the maf....may work out better and be cheaper.
     
  12. Oct 17, 2009 at 8:09 PM
    #12
    04coma

    04coma [OP] Well-Known Member

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    04 trd offroad sr5 prerunner debadged
    air aid intake and throttle body spacer billet grill clear corner lights and 3rdbrake decal "coma" :)
    the mafs is 80 bucks the o2 sensor is 180 . but anywho how do you clean it?
     
  13. Oct 17, 2009 at 8:13 PM
    #13
    tacomaman06

    tacomaman06 Carolina Alliance: Enforcer

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    getting there....
    there is maf cleaner by crc

    [​IMG]

    clean it, and replace the o2 sensor. no real way to clean them. clean the connector on the maf as well.
     
  14. Oct 17, 2009 at 9:44 PM
    #14
    kevhogaz

    kevhogaz Low Speed, High Drag

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    Nowhere does it say in the flow chart for either code, that an O2 sensor is involved. Both codes point directly to the air flow meter.

    The P2238 code points to an open circuit in A/F meter.

    Out of curiosity, how many people giving advice to this guy are actually mechanics? As in work in a shop, repairing cars, on a daily basis? Are you guys looking at a Toyota flow chart, like I am?
     
  15. Oct 17, 2009 at 9:46 PM
    #15
    tacomaman06

    tacomaman06 Carolina Alliance: Enforcer

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    getting there....
    nope............im going off what code i got when i needed a new o2 sensor, and tryin to save the dude money. wow.......you are a tech???:rolleyes:
     
  16. Oct 17, 2009 at 9:48 PM
    #16
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    Many people still call them an O2 sensor. Not sure why, but it has been like that for years. I have had dealerships tell me they were O2 sensors, regardless, as long as the correct one gets replaced.
     
  17. Oct 17, 2009 at 9:51 PM
    #17
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    This O2 sensor #1 may also be refered to as an air/fuel ratio sensor since on some vehicles it is.
     
  18. Oct 17, 2009 at 9:52 PM
    #18
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    The 2 codes given both point at the bank one, sensor one A/F sensor.
     
  19. Oct 17, 2009 at 9:54 PM
    #19
    tacomaman06

    tacomaman06 Carolina Alliance: Enforcer

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    getting there....
    x2.....which is wat i was trying to give a lil advice on. sorry if "cleanin the maf"didnt cover the op's post.
     
  20. Oct 17, 2009 at 9:57 PM
    #20
    04coma

    04coma [OP] Well-Known Member

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    04 trd offroad sr5 prerunner debadged
    air aid intake and throttle body spacer billet grill clear corner lights and 3rdbrake decal "coma" :)
    ummm im confused? let me see if i got this...... for both codes its the same part the only part i need to replace???? which is the mafs , autozone told me it was two different parts they werent sure if it were both that were bad or just one . Mr. toyota tech please explain
     
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