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code P0102

Discussion in 'Technical Chat' started by happyb, Jul 20, 2010.

  1. Jul 20, 2010 at 10:47 PM
    #1
    happyb

    happyb [OP] Well-Known Member

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    threw this code today P0102 Mass or Volume Air Flow Circuit Low Input. what is the part number for the MAF Sensor?
     
  2. Jul 20, 2010 at 11:08 PM
    #2
    MurphyZ

    MurphyZ Well-Known Member

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    before you buy a new one, clean yours with MAF cleaner. let dry completely then reinstall. should clear code.
     
  3. Jul 21, 2010 at 12:06 AM
    #3
    happyb

    happyb [OP] Well-Known Member

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    i am going to do that tomorrow, but just wanted the part number just in case.
     
  4. Jul 21, 2010 at 12:11 AM
    #4
    MurphyZ

    MurphyZ Well-Known Member

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    i dont have that but on my 06 my milage went down to like 12mpg and it through this code, i cleaned my filter and then sprayed the MAF and my milage went back up to 17.7mpg. it screws with the airfuel mix.

    are you having mpg issues? or just hte code?
     
  5. Jul 21, 2010 at 10:05 AM
    #5
    happyb

    happyb [OP] Well-Known Member

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    i just threw the code out of nowhere. i should've cleaned my maf last night, but got lazy. i am going to do it right after work.
     
  6. Jul 21, 2010 at 10:34 AM
    #6
    98tacoma27

    98tacoma27 :POOPCORN: Staff Member

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    The part number is on top of the MAF
     
  7. Jul 21, 2010 at 4:22 PM
    #7
    happyb

    happyb [OP] Well-Known Member

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    ok i just cleaned my maf and throttle body. my truck had a hard time starting than idle pretty good. i turned it off and i tried to start it again any my truck starts and dies. i tried a couple more times and same thing it dies or doesn't even start. what should i do?
     
  8. Jul 21, 2010 at 4:23 PM
    #8
    98tacoma27

    98tacoma27 :POOPCORN: Staff Member

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    Check and see if you blew the EFI fuse.
     
  9. Jul 21, 2010 at 4:44 PM
    #9
    happyb

    happyb [OP] Well-Known Member

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    didn't blow a fuse, but got it to run after i had to give it some gas after getting it started. it was idling very high and took forever to shift when i took it for a drive. is that normal?
     
  10. Jul 21, 2010 at 4:51 PM
    #10
    98tacoma27

    98tacoma27 :POOPCORN: Staff Member

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    The ECU may have to relearn the sensor now that it's clean.
     
  11. Jul 21, 2010 at 4:54 PM
    #11
    blackhawke88

    blackhawke88 wo ai ni bao bei ^_^

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    make sure the cleaner is dry before starting it. try disconnecting the battery for 15+ minutes.
     
  12. Jul 21, 2010 at 7:59 PM
    #12
    happyb

    happyb [OP] Well-Known Member

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    so i had let my truck sit for over an hour with the battery disconnected and still the same problem. i can start it but if i don't give it some gas it dies. this is bugging me since this is my only ride and i gotta take to get checked.
     
  13. Jul 22, 2010 at 4:56 AM
    #13
    98tacoma27

    98tacoma27 :POOPCORN: Staff Member

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    Are your vac lines connected/leaking? It almost sounds like the butterfly is stuck or the IAC needs cleaned.
     
  14. Jul 22, 2010 at 11:57 AM
    #14
    happyb

    happyb [OP] Well-Known Member

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    checked all my lines and it was good. what is IAC? the start up this morning was a little rough, had to do it twice and it got going. a weird thing happened when i was checking my scangauge at a stop light to check the code my truck shut off, but i was able to get it started again no problem. the truck ran fine going to work, but the RPMs was kind of high. when i got to work i shut the truck off waited like 30 seconds and started it back up with no problems whatsoever. i am going to try make an appointment with a mechanic to check it out.
     
  15. Jul 22, 2010 at 12:27 PM
    #15
    98tacoma27

    98tacoma27 :POOPCORN: Staff Member

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    Idle Air Control Valve, but nevermind about that. I just now saw you have a 4.0.........:frusty:
     
  16. Jul 28, 2010 at 4:54 AM
    #16
    MurphyZ

    MurphyZ Well-Known Member

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    my 06 did this. i figured because i "refreshed" the ecu it would take some time to relearn what air flow mix was needed to drive healthy. if you are sure your vacuum hoses are fine and you are not showing any codes...

    clean your MAF with the cleaner( put it in a place that is: dry, away from dust and dirt, allow to dry for at least 15-30min.) after that check your throttle body- just to clean it if dirty. put back together and drive like a grandma around for 100 or so miles. ( your MPG will suck- i got 13) after that your ECU should start to change the settings and return to normal settings.

    that is what i did and after the intial trip ( i went from medford OR. to Crater Lake OR) my truck started and re started with no throttle.

    hope this helps
     
  17. Jul 28, 2010 at 1:17 PM
    #17
    happyb

    happyb [OP] Well-Known Member

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    i've cleaned my maf with cleaner, cleaned my throttle body too, let it dry two times already and nothing. my gas mileage has been the same and i still get around 17-18 mpg. i have low end power loss and shifts at higher rpms. my truck can't start on its own without me reving my engine once, after i rev it my truck runs and if i don't rev in on the intial start it dies.
     
  18. Aug 5, 2010 at 5:40 PM
    #18
    happyb

    happyb [OP] Well-Known Member

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    changed the sensor and everything works now, just gotta get the CEL to go off
     
  19. Aug 5, 2010 at 6:04 PM
    #19
    98tacoma27

    98tacoma27 :POOPCORN: Staff Member

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    Pull the NEG cable on the battery
     
  20. Aug 12, 2010 at 10:18 AM
    #20
    happyb

    happyb [OP] Well-Known Member

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    i pulled the neg off the battery for 15 minutes and the light is still on. i used my scangauge to see if i was throwing anymore codes and it is still the same one. i replaced the sensor and still the same sh*t is going on. my truck starts after the second time i try and it still takes forever for my automagic to shift.
     
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