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11 codes on the first scan....

Discussion in '1st Gen. Tacomas (1995-2004)' started by JL242, Apr 18, 2012.

  1. Apr 18, 2012 at 5:04 AM
    #1
    JL242

    JL242 [OP] New Member

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    I have a 1998 Tacoma 4X4 3.4 with a TRD supercharger. I have owned the truck since 2000. It has 187K on it. It was running fine until yesterday. It would idle rough, but once I pressed the gas pedal it would accelerate easily. The check engine light came on shortly thereafter. I scanned it and 11 codes were given. PO300, PO301, PO302, PO303, PO304, PO305, PO306, PO171, PO171P, PO130, PO133. I replaced the spark plugs and wires about 8 months ago. After searching these forums and getting a game plan I will clean the MAF first, then a fuel filter, and O2 sensor. When looking for vacuum leaks can I use the small green bottles of propane?? And on the PO130 it says bank 1 sensor 1, is that the one in front of the cat?? Thanks for any assistance....
     
  2. Apr 18, 2012 at 5:07 AM
    #2
    BrokenTusk

    BrokenTusk I support a velociraptor free workplace.

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    Give me a second to compile all your codes, I have a hunch
     
  3. Apr 18, 2012 at 5:13 AM
    #3
    BrokenTusk

    BrokenTusk I support a velociraptor free workplace.

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    Okay so, based on:
    http://www.tacomaworld.com/forum/technical-chat/68667-obdii-error-codes.html

    P0130 02 Sensor Circuit Malfunction (Bank I Sensor 1)
    P0133 02 Sensor Circuit Slow Response (Bank 1 Sensor 1)
    P0171 System too Lean (Bank 1)

    -(Trying to do this numerically, but you have P0171 listed twice, but in case you meant P0172)

    P0172 System too Rich (Bank 1)
    P0300 Random/Multiple Cylinder Misfire Detected
    P0301 Cylinder 1 Misfire Detected
    P0302 Cylinder 2 Misfire Detected
    P0303 Cylinder 3 Misfire Detected
    P0304 Cylinder 4 Misfire Detected
    P0305 Cylinder 5 Misfire Detected
    P0306 Cylinder 6 Misfire Detected


    You sir have a bane of the DIY mechanics world. It's an electrical issue if your getting all of these suddenly at once. I'd bet my tattoo'd tushy a bad/rust/corroded grounding wire somewhere. Clean up all your grounds, even if they look fine. I've seen even slight discolouration of the metals cause issues.
     
  4. Apr 18, 2012 at 5:20 AM
    #4
    BrokenTusk

    BrokenTusk I support a velociraptor free workplace.

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  5. Apr 18, 2012 at 5:43 AM
    #5
    JL242

    JL242 [OP] New Member

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    Thanks so much. Just to clarify the PO171 it was a PO171 and PO171P. Which I have no idea what a PO171P is, I couldn't find it in the book....
     
  6. Apr 18, 2012 at 5:44 AM
    #6
    BrokenTusk

    BrokenTusk I support a velociraptor free workplace.

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    No problem :thumbsup:

    I've never heard of a P0171P before?? Let me try some more digging
     
  7. Apr 18, 2012 at 5:54 AM
    #7
    BrokenTusk

    BrokenTusk I support a velociraptor free workplace.

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    Well, luckily, the P0171P code is barely ever mentioned in all of online. Another guy running a Z28 had this issue, turned out to be a low fuel pressure issue. Suggestions were he might have had an Iced up fuel line, and to use fuel de-icer. Depending on you climate, might be an issue but I doubt it. Get your fuel pressure checked.

    His issue ended up being a slightly cracked fuel pump, had to be replaced.
     
  8. Apr 18, 2012 at 6:05 AM
    #8
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    Don't waste your time replacing any sensors yet. The combination of codes suggests a fuel delivery problem. And the "P" after the 171 isn't of any significance. Clean the MAF, check for blown EFI fuses, and replace the fuel filter first. Also look at the fuel pressure regulator. If there is no change, then replace the AFR (first O2 sensor aka Bank 1 Sensor 1)

    http://www.ncttora.com/fsm/2000/index.html
     
  9. Apr 18, 2012 at 11:42 AM
    #9
    JL242

    JL242 [OP] New Member

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    TRD supercharger
    Yall are awesome. Thanks so much for the help. It was a vacuum leak on the back of the supercharger. Thanks again!!
     
  10. Apr 18, 2012 at 11:47 AM
    #10
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    Gotta love those simple fixes
     
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