1. Welcome to Tacoma World!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tacoma discussion topics
    • Communicate privately with other Tacoma owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

OBD2 PO301 Code

Discussion in '1st Gen. Tacomas (1995-2004)' started by NLamb1978, Apr 3, 2010.

  1. Apr 3, 2010 at 1:26 PM
    #1
    NLamb1978

    NLamb1978 [OP] Member

    Joined:
    Apr 3, 2010
    Member:
    #34514
    Messages:
    7
    Gender:
    Male
    First Name:
    Nicholas
    NC
    Vehicle:
    96 4x4 2.7L Ext Cab
    On my way to work this morning my truck developed a problem. I felt a small hiccup and knew something was amiss. I stepped on the gas and the check enging light came on. It was running real rough and had no power. I limped to a nearby parking lot and hooked up my scanner. I got a PO301 code. Misfire detected cylinder 1. Made it back home. Changed out the plugs, distributor cap and rotor button. Made it a little better. Seems to run fine then starts missing.
    Should I try to replace the wires or just take it to the mechanic?

    96 Tacoma 4x4 2.7L
    138k miles
     
  2. Apr 3, 2010 at 1:41 PM
    #2
    rmb_crew

    rmb_crew My other ride has 18,400HP!!!!!!

    Joined:
    Jan 21, 2009
    Member:
    #12837
    Messages:
    6,076
    Gender:
    Male
    First Name:
    Ryan
    Jacksonville, FL 30.243103, -81.591007‎
    Vehicle:
    2010 F150 XLT SuperCrew 4X4
    Access larado tonneau, magnaflow exhaust
    Any oil or anything on the plug when you took it out or anything like that. Try changing out the wire and go from there.
     
  3. Apr 3, 2010 at 3:58 PM
    #3
    IamTacO

    IamTacO red balls got me!

    Joined:
    Jan 31, 2010
    Member:
    #30401
    Messages:
    703
    Gender:
    Male
    First Name:
    adam
    QC az
    Vehicle:
    01 Prerunner SR5 TRD-Offroad
    4x2 Prerunner. Hankook Dynapro ATM rf10 265-65-16, e-locker FTW! Morimoto d2s bi-xenon HID projectors, Philips 85122+ 4300K, Cobra 75 w/ 3' firefly, Kenwood KDC-MP342U w/ SIRIUS, Line-x bed liner, 4' coretrax(black)
    you might want to consider a compression test soon too. just in case
     
  4. Apr 3, 2010 at 5:03 PM
    #4
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

    Joined:
    May 8, 2008
    Member:
    #6497
    Messages:
    106,158
    Gender:
    Male
    First Name:
    FlimFlubberJAM
    Tenoe, AZ
    Vehicle:
    2013 Rubicon Unlimited,
    4.10 gears, sliders, and lots of buttons.
    Sounds like a fuel injector.
     
  5. Apr 4, 2010 at 6:18 AM
    #5
    NLamb1978

    NLamb1978 [OP] Member

    Joined:
    Apr 3, 2010
    Member:
    #34514
    Messages:
    7
    Gender:
    Male
    First Name:
    Nicholas
    NC
    Vehicle:
    96 4x4 2.7L Ext Cab
    No oil on the plug. All of them looked pretty much the same. Hoping it is not something like timing or bad compression. But my thinking is that it would run lousy all the time if it was one of those. Not the intermittent spells of seeming to run OK that I am getting.

    Thanks for the help.
     
  6. Apr 4, 2010 at 6:52 AM
    #6
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

    Joined:
    Dec 18, 2008
    Member:
    #11714
    Messages:
    49,857
    Gender:
    Male
    First Name:
    Ben
    Beech Creek
    Vehicle:
    05 Tundra SR5 (+250k AND COUNTING), 88 SR5 PU (SOLD), 98 TRD OR (CRUSHED)
    5100's all on fours
    Yes, replace the wires.
     
  7. Apr 4, 2010 at 7:02 AM
    #7
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

    Joined:
    May 8, 2008
    Member:
    #6497
    Messages:
    106,158
    Gender:
    Male
    First Name:
    FlimFlubberJAM
    Tenoe, AZ
    Vehicle:
    2013 Rubicon Unlimited,
    4.10 gears, sliders, and lots of buttons.
    What are your thoughts on the fuel injector?
     
  8. Apr 4, 2010 at 8:26 AM
    #8
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

    Joined:
    Dec 18, 2008
    Member:
    #11714
    Messages:
    49,857
    Gender:
    Male
    First Name:
    Ben
    Beech Creek
    Vehicle:
    05 Tundra SR5 (+250k AND COUNTING), 88 SR5 PU (SOLD), 98 TRD OR (CRUSHED)
    5100's all on fours
    I think it is possible, but I have mostly seen it being a wire, plug or coil/distributor issue with the 300 series code.
     
  9. Apr 4, 2010 at 8:38 AM
    #9
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

    Joined:
    May 8, 2008
    Member:
    #6497
    Messages:
    106,158
    Gender:
    Male
    First Name:
    FlimFlubberJAM
    Tenoe, AZ
    Vehicle:
    2013 Rubicon Unlimited,
    4.10 gears, sliders, and lots of buttons.
    Ah.... I have seen it as FI's in the past. Well....OP....Start with the cheapest, and work up. What Ben said would be a good beginning point.
     
  10. Apr 4, 2010 at 9:40 AM
    #10
    mattleegee

    mattleegee Well-Known Member

    Joined:
    Mar 21, 2010
    Member:
    #33672
    Messages:
    513
    Gender:
    Male
    Tacoma, WA
    Vehicle:
    04 350z
    My brand new Toyota Corolla did the same thing, i had about 9k miles on it and #4 cylinder did the hiccup on start up and light came on.. i forgot the code but i shut off car, cleared code and havent seen it again
     
  11. Apr 4, 2010 at 12:52 PM
    #11
    IamTacO

    IamTacO red balls got me!

    Joined:
    Jan 31, 2010
    Member:
    #30401
    Messages:
    703
    Gender:
    Male
    First Name:
    adam
    QC az
    Vehicle:
    01 Prerunner SR5 TRD-Offroad
    4x2 Prerunner. Hankook Dynapro ATM rf10 265-65-16, e-locker FTW! Morimoto d2s bi-xenon HID projectors, Philips 85122+ 4300K, Cobra 75 w/ 3' firefly, Kenwood KDC-MP342U w/ SIRIUS, Line-x bed liner, 4' coretrax(black)
    my old wrx would throw a p0304 code only during cold start ups. the compression test was fine and the plugs were too. turned out to be valve shims that were getting out of spec. not sure if you have a maf/map but cleaning it up would help too. if you want to try the injector theory, swap it to another cylinder and see if the code moves
     
  12. Apr 4, 2010 at 3:42 PM
    #12
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

    Joined:
    May 8, 2008
    Member:
    #6497
    Messages:
    106,158
    Gender:
    Male
    First Name:
    FlimFlubberJAM
    Tenoe, AZ
    Vehicle:
    2013 Rubicon Unlimited,
    4.10 gears, sliders, and lots of buttons.
    X2. Swapping the wires would rule them out as well....
     
  13. Apr 5, 2010 at 5:27 PM
    #13
    biggdog747

    biggdog747 Well-Known Member

    Joined:
    Mar 7, 2010
    Member:
    #32729
    Messages:
    57
    Gender:
    Male
    MI
    Vehicle:
    taco
    Replace the plug wires first. toyotas like factory ignition parts but you can try some good aftermarket ones. i would not go after a fuel injector if i got better and then started up again.
     
  14. Apr 5, 2010 at 7:42 PM
    #14
    rmb_crew

    rmb_crew My other ride has 18,400HP!!!!!!

    Joined:
    Jan 21, 2009
    Member:
    #12837
    Messages:
    6,076
    Gender:
    Male
    First Name:
    Ryan
    Jacksonville, FL 30.243103, -81.591007‎
    Vehicle:
    2010 F150 XLT SuperCrew 4X4
    Access larado tonneau, magnaflow exhaust
    Any luck?
     
  15. Apr 10, 2010 at 1:39 PM
    #15
    NLamb1978

    NLamb1978 [OP] Member

    Joined:
    Apr 3, 2010
    Member:
    #34514
    Messages:
    7
    Gender:
    Male
    First Name:
    Nicholas
    NC
    Vehicle:
    96 4x4 2.7L Ext Cab
    It turned out to be just a bad plug wire. Strange how it just went bad.
    Thanks for all the help.:)
     
  16. Apr 10, 2010 at 8:34 PM
    #16
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

    Joined:
    Dec 18, 2008
    Member:
    #11714
    Messages:
    49,857
    Gender:
    Male
    First Name:
    Ben
    Beech Creek
    Vehicle:
    05 Tundra SR5 (+250k AND COUNTING), 88 SR5 PU (SOLD), 98 TRD OR (CRUSHED)
    5100's all on fours
To Top