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Code P0301

Discussion in '1st Gen. Tacomas (1995-2004)' started by 2KTacoPr3runn3r, Oct 21, 2011.

  1. Oct 21, 2011 at 7:37 PM
    #1
    2KTacoPr3runn3r

    2KTacoPr3runn3r [OP] Well-Known Member

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    Anyone help me out? Threw a code on the way home from work. Scan gauge says P0301. Anyone got a code book? Thanks
     
  2. Oct 21, 2011 at 9:31 PM
    #2
    SkyHighTacoma

    SkyHighTacoma Josh

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  3. Oct 21, 2011 at 10:59 PM
    #3
    2KTacoPr3runn3r

    2KTacoPr3runn3r [OP] Well-Known Member

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    Bilstein 5100 adjustables, 2 inch top plate spacer, bilstein 5100 rears and 2 inch blocks. Flowmaster super 10 with dual 4 inch tips.
    thanks man. Guess i better check my spark plugs and my o2 sensor since i think those would be the cause of the problem most likely right?
     
  4. Oct 21, 2011 at 11:04 PM
    #4
    G scott04

    G scott04 ...

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    if you figure it out let me know!
     
  5. Oct 22, 2011 at 5:13 AM
    #5
    hogeyphenogey

    hogeyphenogey Rotted frame = New Truck!

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    Plug, wire, or coil. Good places to begin.
     
  6. Oct 22, 2011 at 12:32 PM
    #6
    2KTacoPr3runn3r

    2KTacoPr3runn3r [OP] Well-Known Member

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    ya i googled it and it said the plug coil or wire. it also said their should be some hard starting or rough idle so i might clear the code and see if it pops up again cus i have neither of those happening
     
  7. Oct 22, 2011 at 12:47 PM
    #7
    MapleMoose

    MapleMoose Drunk Canadian

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    What you can also do is run some "injector clean" through to clean the injectors. A cylinder misfire is usually your injector getting plugged. Clean them up and see how she idles. If it doesnt work, look into getting your injectors serviced
     
  8. Oct 22, 2011 at 12:50 PM
    #8
    JimBeam

    JimBeam BECAUSE INTERNETS!! Moderator

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  9. Oct 22, 2011 at 12:54 PM
    #9
    lotsoftoys

    lotsoftoys pavement is boring....

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    bunch of crap
    start with spark, then fuel(so u dont blow urself up checking spark after u cracked open a fuel line LOL) then compression.
     
  10. Oct 22, 2011 at 2:06 PM
    #10
    2KTacoPr3runn3r

    2KTacoPr3runn3r [OP] Well-Known Member

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    Bilstein 5100 adjustables, 2 inch top plate spacer, bilstein 5100 rears and 2 inch blocks. Flowmaster super 10 with dual 4 inch tips.
    thanks guys. ill definitely run some injector cleaner first since thats simple and easiest right now cus with school and work i dont have the time to pull the injectors
     
  11. Oct 22, 2011 at 11:03 PM
    #11
    2KTacoPr3runn3r

    2KTacoPr3runn3r [OP] Well-Known Member

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    okay cleared the code. now a P0125 and a P1135 are coming up
     
  12. Oct 23, 2011 at 8:36 AM
    #12
    crainholio

    crainholio Well-Known Member

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    What does your temp gauge show? Needle should be around 1/2 of the sweep, pointing at 9 o'clock approximately.
     
  13. Oct 23, 2011 at 8:55 AM
    #13
    2KTacoPr3runn3r

    2KTacoPr3runn3r [OP] Well-Known Member

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    yup always there ive never seen it go hgher than half
     
  14. Oct 23, 2011 at 12:57 PM
    #14
    MapleMoose

    MapleMoose Drunk Canadian

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    P0125 - Insufficient Coolant Temperature for Closed Loop Fuel Control

    * Not sure about this one...

    P1135 - Air/Fuel Sensor Heater Circuit Response. (Bank 1 Sensor 1)

    Most likely your pre-cat 02 sensor
     
  15. Oct 23, 2011 at 5:32 PM
    #15
    2KTacoPr3runn3r

    2KTacoPr3runn3r [OP] Well-Known Member

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    ya thats what my mechanic buddy said about 1135 but he wasnt sure about the 0125 either
     
  16. Dec 2, 2011 at 6:55 PM
    #16
    Anthony250

    Anthony250 E-Fabber

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    Ive been having the problem of the P0125 for a little while ive done everything its come down to see that its my Front Oxygen Sensor. Most likey this is the case all the time for this code anyways.
     
  17. Dec 2, 2011 at 9:54 PM
    #17
    WestEnd

    WestEnd Member

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    Just had the same issues, with the same codes last weekend.

    Went through all the tests, just to find a bad plug wire. The second two codes pop up because the raw fuel is passing through the combustion chamber unburned. The #1 cylinder isn't firing all the time, so it creates an ultra rich condition flagging the codes.

    If you have a meter, check your wires. None of them should read higher than 25K Ohms of resistance.

    I had #1 wire with 78K ohms. Started misfiring under load, but idled perfectly and started easily.

    I changed my plugs and wires to OE NGK's and cleared the codes. She runs like new!!

    Good Luck!
     
  18. Dec 2, 2011 at 10:58 PM
    #18
    2KTacoPr3runn3r

    2KTacoPr3runn3r [OP] Well-Known Member

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    Bilstein 5100 adjustables, 2 inch top plate spacer, bilstein 5100 rears and 2 inch blocks. Flowmaster super 10 with dual 4 inch tips.
    idle is now rough and start up is hard on cold mornings so i think its the spark plugs. i just need a weekend off to fix it
     
  19. Mar 28, 2012 at 9:57 PM
    #19
    2KTacoPr3runn3r

    2KTacoPr3runn3r [OP] Well-Known Member

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    Bilstein 5100 adjustables, 2 inch top plate spacer, bilstein 5100 rears and 2 inch blocks. Flowmaster super 10 with dual 4 inch tips.
    got spark plugs changed out. still throwing p0125 and p1130, so guessin it is my o2 sensor. how hard is it to replace and where can i find it. thanks guys
     
  20. Mar 29, 2012 at 4:06 PM
    #20
    crainholio

    crainholio Well-Known Member

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    I'd say that if spark plugs weren't within your scope, the O2 sensor isn't a project you'd want to tackle. Shop time again?
     
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