Just got a 2008 Prius - 2 days later P0101

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Rockhound, Jun 29, 2016.

  1. Rockhound

    Rockhound Junior Member

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    Just got a 2008 Prius. Everything was fine for 2 days. Then Engine Light came on. Scan said P0101 (MAF sensor).

    I looked up what it can be. I will start with Air filter, check vac lines, PCV, Air intake hose, then I will try cleaning the MAF sensor. Am I on the right track? Anything else?

    Another question. I cleared the CEL just to see if it was a one time thing. CEL came on the next day, but then it turned off about an hour later after I went to the store. The only thing I know of that turns the CEL off is the EGR valve ( if it starts working OK again).

    Does P0101 turn off if the MAF or whatever was the problem starts working again?
     
    #1 Rockhound, Jun 29, 2016
  2. JC91006

    JC91006 Senior Member

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    Try cleaning the maf sensor with maf sensor cleaner. If that doesn't work, you can buy a new one on Amazon for about $70. Buy the correct Denso part
     
    #2 JC91006, Jun 29, 2016
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  3. Rockhound

    Rockhound Junior Member

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    What do you mean "correct Denso part" ? Is a Pruis sensitive about brand and quality? So don't get anything from O'Rielys or Autozone?
     
    #3 Rockhound, Jun 29, 2016
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  4. Rockhound

    Rockhound Junior Member

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    Cleaning the MAF sensor with MAF cleaner seemed to have solved the problem. Been 24 hours now and no light
     
    #4 Rockhound, Jul 8, 2016
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  5. johnnyb588

    johnnyb588 Member

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    Good to hear. That would have been my first suggestion had I seen your original post. Your other thoughts were good as well, but my experience has led me to believe that a MAF code is more often than not directly related to the MAF sensor rather than other related components. A good MAF cleaning every 100k or so isn't a bad idea.

    Btw, let us know if it pops back up. It took two days to come on the first time. After only 24 hours, you may still be in the zone where the ECU is figuring things out and just hasn't thrown the code yet.
     
    #5 johnnyb588, Jul 8, 2016
  6. bisco

    bisco cookie crumbler

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    congrats! how many miles on her?
     
    #6 bisco, Jul 8, 2016
  7. Rockhound

    Rockhound Junior Member

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    Right now it's been 4 days and no code so far. Previously when I cleared the code, it would come back on in less than 24 hours.

    I don't know if this means anything, but I noticed before that if I drive around the neighborhood or say less than 40 MPH, the light doesn't come on. But if I drive about 45 MPH or faster, that's when it would come on. One other thing I found was that when I checked the air filter, there was a loose rubber fitting that was kinked (that extra loop part that extends from the filter and fits in the plastic groove. I could tell that the rubber ring was not in place properly, so I am sure a bit of unfiltered air was getting in and that the plastic cover and pinching the rubber part.

    Odometer is about 125,000
     
    #7 Rockhound, Jul 11, 2016
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  8. Ozzbo

    Ozzbo New Member

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    I have the same error P0101. I cleaned the MAF sensor already twice. I noticed that the error appears while driving for some time, 1 hour and more. After the first appearance, the code disappears itself after couple days. Now it shows up again. Should I replace the sensor? What's the PN? Thanks.
     
    #8 Ozzbo, Sep 17, 2023
  9. cyberpriusII

    cyberpriusII Prodigyplace says I'm Super Kris

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    Not to be nasty, but if you figured out how to post here, you can figure out what MAF you need.
    Kris
     
    #9 cyberpriusII, Sep 17, 2023
  10. ChapmanF

    ChapmanF Senior Member

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    But posting here is fun, and looking parts up is dismal.
     
    #10 ChapmanF, Sep 17, 2023
  11. Ozzbo

    Ozzbo New Member

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    The point is more about sharing similar experience if any. Once replaced, I will monitor if the error drops again. Already ordered Denso
     
    #11 Ozzbo, Sep 17, 2023
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  12. douglasjre

    douglasjre Senior Member

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    U won't need a new sensor. Cancel the order
     
    #12 douglasjre, Sep 17, 2023
  13. mr_guy_mann

    mr_guy_mann Senior Member

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    Now, now. With an attitude like that, you'll probably not even suggest that folks perform any testing.



    Posted via the PriusChat mobile app.
     
    #13 mr_guy_mann, Sep 18, 2023
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