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Code P0171

Discussion in 'Technical Chat' started by Flaadog, Nov 15, 2007.

  1. Nov 15, 2007 at 1:57 PM
    #1
    Flaadog

    Flaadog [OP] Well-Known Member

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    Pacifica, CA
    Vehicle:
    2002 Double Cab TRD SR5 4x4
    Toytec 3" Pro Deluxe 1000 lift, Bedrug, Snugtop, Yakima rack, Goodyear Wrangler Silent Armor 265/75R16
    I just hooked up an Actron OBDII AutoScanner and had one code show up. The reader pulled up "P0171 - System too lean". I dumped the code, so I could wait to see if the Check Engine Light comes back on. But assuming it is still an issue and does return, does anyone out there know if this is an easy fix? If so would you mind sharing a few details on what to do?

    Thanks!
     
  2. Nov 15, 2007 at 2:27 PM
    #2
    Flaadog

    Flaadog [OP] Well-Known Member

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    Pacifica, CA
    Vehicle:
    2002 Double Cab TRD SR5 4x4
    Toytec 3" Pro Deluxe 1000 lift, Bedrug, Snugtop, Yakima rack, Goodyear Wrangler Silent Armor 265/75R16
    By the way, I have a stock 2002 3.4 V6.
     
  3. Nov 15, 2007 at 3:04 PM
    #3
    humanoid

    humanoid bite me

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    Probably a dirty MAF sensor. Do you have a K&N air filter or some other after market oiled air filter? If so, the oil from the filter may have gunked up the MAF causing the code.
     
  4. Nov 15, 2007 at 3:39 PM
    #4
    Flaadog

    Flaadog [OP] Well-Known Member

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    Pacifica, CA
    Vehicle:
    2002 Double Cab TRD SR5 4x4
    Toytec 3" Pro Deluxe 1000 lift, Bedrug, Snugtop, Yakima rack, Goodyear Wrangler Silent Armor 265/75R16
    I don't have a K&N, but I did just get a new filter. It's just a regular filter from an oil change garage. Forgive my ignorance, but does MAF stand for manifold aif flow?
     
  5. Nov 15, 2007 at 3:42 PM
    #5
    humanoid

    humanoid bite me

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    I had a '99 Xtra Cab PreRunner SR5 V6
    MAF=mass air flow sensor. It should be located a few inches from the air box on the intake tube.
     
  6. Nov 15, 2007 at 3:45 PM
    #6
    Flaadog

    Flaadog [OP] Well-Known Member

    Joined:
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    Pacifica, CA
    Vehicle:
    2002 Double Cab TRD SR5 4x4
    Toytec 3" Pro Deluxe 1000 lift, Bedrug, Snugtop, Yakima rack, Goodyear Wrangler Silent Armor 265/75R16
    I'll check that out. Thanks.
     
  7. Dec 27, 2010 at 11:41 AM
    #7
    Flaadog

    Flaadog [OP] Well-Known Member

    Joined:
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    Pacifica, CA
    Vehicle:
    2002 Double Cab TRD SR5 4x4
    Toytec 3" Pro Deluxe 1000 lift, Bedrug, Snugtop, Yakima rack, Goodyear Wrangler Silent Armor 265/75R16
    Alll these years later.... I did end up replacing the MAF shortly after this orginal post, and the fix did work.

    Hello Tacoma World.
     
  8. Dec 27, 2010 at 11:53 AM
    #8
    jhodge83

    jhodge83 Any dog under 50# is a cat and cats are useless... Staff Member

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    wat?
    :rofl: niiiiiice...at least you shared the love!!
     
  9. Dec 27, 2010 at 12:00 PM
    #9
    98tacoma27

    98tacoma27 :POOPCORN: Staff Member

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    5100's all on fours
    [​IMG]

    Glad you got it fixed.
     
  10. Oct 28, 2011 at 2:08 AM
    #10
    GS SMITH

    GS SMITH New Member

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    BEAR
    SOUTHERN CALIFORNIA
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    TACOMA 4X4 ACC CAB SR5 PRERUNNER
    Morning all ! I just picked up a 2000 tacoma acc cab prerunner SR5 TRD and thinking about putting a "KILL SWITCH" in it, looking through the Haynes book and can't seem to find witch wire to splice into. Any suggestions
     
  11. Oct 28, 2011 at 5:58 AM
    #11
    98tacoma27

    98tacoma27 :POOPCORN: Staff Member

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    5100's all on fours
    http://www.ncttora.com/fsm/2000/index.html

    Electrical prints are all the way at the bottom of the above link.

    The Black/Red off the ignition switch will kill the Igniter.

    The White/Red off the EFI realy will kill the ECU power. (Probably should avoid that one)

    The Light blue (Teal?) on the Circuit opening relay will kill the fuel pump.

    Personally I would kill the fuel pump and the ignition.
     
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