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After ECM update, P0101 code

Discussion in '2nd Gen Tundras (2007-2013)' started by ronko, Oct 19, 2015.

  1. Oct 19, 2015 at 6:29 AM
    #1
    ronko

    ronko [OP] New Member

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    I have a problem with my tundra after I took it to the dealer on 10/09/15 they did the new ECM software update and my check engine light , traction control light came on after that, with a p0101 code.I already replace the sensor but the light keeps coming back on Can anyone help me?
     
  2. Oct 19, 2015 at 6:37 AM
    #2
    Sean266

    Sean266 #ThinBlueLine Staff Member

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    P0101 is the mass air flow circuit.
    What type of what did the dealer do? If it came right on after the dealer, why not take it directly back?
     
  3. Oct 19, 2015 at 7:11 AM
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    ronko

    ronko [OP] New Member

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    Its a recall (limited service campaign BST.update ECM software, install smart stop technology OP code ELSBOS) I did took my truck to the dealer they said they replaced the mass airflow sensor but the warning light kept coming back on. I took it every day for 5 days, after the 5 th day they told me that the fuel pump needed to be replaced but the code was always the same, I dont really know how they came up with this.does the fuel pump have anything to do with this code?
     
    Last edited: Oct 19, 2015
  4. Oct 19, 2015 at 7:47 AM
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    Sean266

    Sean266 #ThinBlueLine Staff Member

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  5. Oct 19, 2015 at 11:51 AM
    #5
    LOTSOFTOYS

    LOTSOFTOYS New Member

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    That's the only code it's throwing is a p0101? Do u have an aftermarket intake?
     
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  6. Oct 19, 2015 at 12:13 PM
    #6
    matluth

    matluth Fish On!

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    18"X9" FN BFD's rims, 295/70R/18E Cooper Discoverer STT Pro's, upgraded to Old Man EMU coil-overs/shocks. Toytec shackles Next: true dual exhaust, new UCA's.
    Welcome from Aurora,CO. @LOTSOFTOYS will definitely set you straight.
     
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  7. Oct 19, 2015 at 12:52 PM
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    ronko

    ronko [OP] New Member

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    Is the only code reading on the scan tool for now !!
     
  8. Oct 19, 2015 at 12:52 PM
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    ronko

    ronko [OP] New Member

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    No sir .that is the only code right now...
     
    Last edited: Oct 19, 2015
  9. Oct 19, 2015 at 2:44 PM
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    LOTSOFTOYS

    LOTSOFTOYS New Member

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    That's super weird... but how they came up with a fuel pump I didn't know. Unless they are seeing it running lean. Faulty a/f ratio sensors could cause the ecu to think the maf is bad too.... especially if theyreplaced the maf and it didn't change anything. Gotta look outside the box.
     
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  10. Oct 19, 2015 at 3:06 PM
    #10
    flynbyu2

    flynbyu2 I'm your huckleberry...

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    Kinda strange timing that it only did it after they did the update.
     
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  11. Oct 19, 2015 at 3:29 PM
    #11
    LOTSOFTOYS

    LOTSOFTOYS New Member

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    That update has nothing to do with maf tho
     
  12. Oct 19, 2015 at 3:31 PM
    #12
    flynbyu2

    flynbyu2 I'm your huckleberry...

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    Agreed......but don't you find the timing unusual?
     
  13. Oct 19, 2015 at 3:39 PM
    #13
    LOTSOFTOYS

    LOTSOFTOYS New Member

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    Not really... shit like this happens all the time. I change your oil and next week your rear diff blows up. So immediately customers suspect I did somthing.... coincidences happen alot when working with machines
     
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  14. Oct 19, 2015 at 4:53 PM
    #14
    ronko

    ronko [OP] New Member

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    • I appreciate all of your comments I just took the truck back to the dealer to see what they gonna cone up with , but for me replacing the maf sensor and then the fuel pump make no sense. ..I will appreciate your advices..
     
  15. Oct 19, 2015 at 4:59 PM
    #15
    ronko

    ronko [OP] New Member

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    A car's electronic control module is the computer responsible for providing fuel to the engine and controlling the quality of the car's emissions. I fount this about ECM
     
  16. Oct 19, 2015 at 5:02 PM
    #16
    ronko

    ronko [OP] New Member

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    I dont know if updating the software could mess up the ECM on a car? What do you guys think?
     
  17. Oct 19, 2015 at 5:10 PM
    #17
    ronko

    ronko [OP] New Member

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    Last edited: Oct 19, 2015
  18. Oct 19, 2015 at 7:38 PM
    #18
    Sean266

    Sean266 #ThinBlueLine Staff Member

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    Get the truck back yet?
     
  19. Oct 20, 2015 at 5:27 AM
    #19
    ronko

    ronko [OP] New Member

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    They will call me today to let me know what they found this time, I hope they dont keep with the same bs about replacing the fuel pump, do you think a low pressure will cause this warning light to come on?
     
  20. Oct 20, 2015 at 8:36 AM
    #20
    LOTSOFTOYS

    LOTSOFTOYS New Member

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    It could cause issues yes. But if they stick with that story, ask them why it didn't set a lean code?
     
  21. Oct 20, 2015 at 12:25 PM
    #21
    ronko

    ronko [OP] New Member

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    I dont find anything unusual truck drives great...
     
  22. Apr 19, 2016 at 1:40 PM
    #22
    Amp

    Amp New Member

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    I just got mine back from the ECM update and my gas mileage got better for at least the first 20 miles I have driven it
     
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