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

Trouble codes from 0301 to 0300

Discussion in '1st Gen. Tacomas' started by 04tacomarob, Jun 6, 2013.

  1. Jun 6, 2013 at 6:13 PM
    #1
    04tacomarob

    04tacomarob [OP] Well-Known Member

    Joined:
    Jan 28, 2013
    Member:
    #96286
    Messages:
    120
    Gender:
    Male
    First Name:
    Robert
    Fallon, NV
    Vehicle:
    04 Tacoma TRD
    Grey wire mod ToyTec ultimate lift
    Truck had the P0301 code forever now, adopted the neglected truck from the wife. Was told the code started after a bad PCV valve was found.

    Changed the plugs and all wires with OEM parts and correctly gapped all plugs to FSM requirements. Took it for a drive, took about a mile for the CEL to come on. Was not flashing from the way home to the parts house. New code is P0300, random misfire.

    I don't remember if I read right but can the o2's cause this? Most of the solutions I have found have been air leaks in the intake, EGR, and PCV. Has anyone had experience chasing this and fixing it?

    Just for some Shits and giggles here's the old plugs... Neglected haha

    [​IMG]
     
  2. Jun 6, 2013 at 6:25 PM
    #2
    exminnesotaboy

    exminnesotaboy Well-Known Member

    Joined:
    Aug 9, 2009
    Member:
    #20904
    Messages:
    112
    Gender:
    Male
    First Name:
    Tony
    Kansas City, MO
    Vehicle:
    01 Tacoma 4x4 V6 Xtra Cab
    Bilstein 5100's / OME 881's / Wheelers 5 leaf pack / ProComp 1069 wheels / 265/75-16 Michelin LTX tires
    since you replaced the plugs wires, that would indicate an ignition coil. 301 = cyl#1, 302 = cyl#2, 303 = cyl#3, etc..... The 300 code is a general misfire.
     
  3. Jun 6, 2013 at 6:35 PM
    #3
    04tacomarob

    04tacomarob [OP] Well-Known Member

    Joined:
    Jan 28, 2013
    Member:
    #96286
    Messages:
    120
    Gender:
    Male
    First Name:
    Robert
    Fallon, NV
    Vehicle:
    04 Tacoma TRD
    Grey wire mod ToyTec ultimate lift
    Ok, I'll start looking at those. Thank you.
     
  4. Jun 7, 2013 at 9:41 AM
    #4
    Fordless

    Fordless Well-Known Member

    Joined:
    May 18, 2013
    Member:
    #104432
    Messages:
    365
    Gender:
    Male
    First Name:
    Jack
    Central Alabama
    Vehicle:
    2015 Tundra DC SR5+
    Was there oil in one of the plug holes? It looks like there was. That'll cause the coil to short out and throw a CEL. You have to change the gasket on the plug tube. It comes as part of the valve cover gasket kit.
    If you run it like that for too long it'll eventually kill the coil and you'll have to replace it to get the CEL to go away.
     
  5. Jun 7, 2013 at 11:06 AM
    #5
    04tacomarob

    04tacomarob [OP] Well-Known Member

    Joined:
    Jan 28, 2013
    Member:
    #96286
    Messages:
    120
    Gender:
    Male
    First Name:
    Robert
    Fallon, NV
    Vehicle:
    04 Tacoma TRD
    Grey wire mod ToyTec ultimate lift
    Yes it was in #4, thanks for that!

    I liberated it from the wife so I have no idea how long it's been like that. She's had it since 07 and unfortunately it wasn't cared for that well.
     
  6. Jun 7, 2013 at 2:29 PM
    #6
    04tacomarob

    04tacomarob [OP] Well-Known Member

    Joined:
    Jan 28, 2013
    Member:
    #96286
    Messages:
    120
    Gender:
    Male
    First Name:
    Robert
    Fallon, NV
    Vehicle:
    04 Tacoma TRD
    Grey wire mod ToyTec ultimate lift
    Forgot to ask in my first post. Will running some seafoam clean valves off? It has a rough idle still and I think that at least one is gummed up.
     
  7. Jun 7, 2013 at 2:31 PM
    #7
    Fordless

    Fordless Well-Known Member

    Joined:
    May 18, 2013
    Member:
    #104432
    Messages:
    365
    Gender:
    Male
    First Name:
    Jack
    Central Alabama
    Vehicle:
    2015 Tundra DC SR5+
    Seafood won't but seafoam will. But I would be willing to bet that coil is toast and that's what's causing your bad idle.
     
  8. Jun 7, 2013 at 2:33 PM
    #8
    04tacomarob

    04tacomarob [OP] Well-Known Member

    Joined:
    Jan 28, 2013
    Member:
    #96286
    Messages:
    120
    Gender:
    Male
    First Name:
    Robert
    Fallon, NV
    Vehicle:
    04 Tacoma TRD
    Grey wire mod ToyTec ultimate lift
    Haha damn, you caught that before the edit :p

    I'll change out those gaskets when I pull the money together for the coil.

    Just to check it, is there a way to test the coils so I can see if I need to replace more than just that one?
     
  9. Jun 7, 2013 at 2:58 PM
    #9
    Madjik_Man

    Madjik_Man The Rembrandt of Rattle Can

    Joined:
    Dec 2, 2009
    Member:
    #26893
    Messages:
    10,239
    Gender:
    Male
    Boulder, CO
    Vehicle:
    1998 Ext Cab TRD 5MT sunfire red pearl
    About 25 pounds of spray paint and vinyl dye
    Goodness... that middle plug looks like it was used as a rectal thermometer.
     
  10. Jun 7, 2013 at 3:33 PM
    #10
    04tacomarob

    04tacomarob [OP] Well-Known Member

    Joined:
    Jan 28, 2013
    Member:
    #96286
    Messages:
    120
    Gender:
    Male
    First Name:
    Robert
    Fallon, NV
    Vehicle:
    04 Tacoma TRD
    Grey wire mod ToyTec ultimate lift
    Hahahaha, if I didn't see where they came out from I would have been a little iffy with it :screwy:
     
  11. Jun 7, 2013 at 4:45 PM
    #11
    Fordless

    Fordless Well-Known Member

    Joined:
    May 18, 2013
    Member:
    #104432
    Messages:
    365
    Gender:
    Male
    First Name:
    Jack
    Central Alabama
    Vehicle:
    2015 Tundra DC SR5+
    The FSM probably has a procedure for checking them with a volt meter. TTora used to have all the FSMs up but I can't find them anymore.
     
  12. Jun 7, 2013 at 5:14 PM
    #12
    Madjik_Man

    Madjik_Man The Rembrandt of Rattle Can

    Joined:
    Dec 2, 2009
    Member:
    #26893
    Messages:
    10,239
    Gender:
    Male
    Boulder, CO
    Vehicle:
    1998 Ext Cab TRD 5MT sunfire red pearl
    About 25 pounds of spray paint and vinyl dye
    If either of you want the FSM, I can send you a link via PM
     
  13. Jun 7, 2013 at 6:10 PM
    #13
    04tacomarob

    04tacomarob [OP] Well-Known Member

    Joined:
    Jan 28, 2013
    Member:
    #96286
    Messages:
    120
    Gender:
    Male
    First Name:
    Robert
    Fallon, NV
    Vehicle:
    04 Tacoma TRD
    Grey wire mod ToyTec ultimate lift
    That would be much appreciated.
     
  14. Jun 7, 2013 at 6:37 PM
    #14
    Fordless

    Fordless Well-Known Member

    Joined:
    May 18, 2013
    Member:
    #104432
    Messages:
    365
    Gender:
    Male
    First Name:
    Jack
    Central Alabama
    Vehicle:
    2015 Tundra DC SR5+
    That would be great...thanks
     
To Top