Maf sensor cleaning

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by moha777, Jul 4, 2020.

  1. moha777

    moha777 Junior Member

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    Hi has anyone used wd40 to clean mass air flow sensor.my mechanic said it wouldn't be a problem.TIA

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  2. Mendel Leisk

    Mendel Leisk Senior Member

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    Get another mechanic lol.

    You should only use a Mass Air Flow specific cleaner. They're a very pure/clean solvent, similar to electronic contact cleaner. Leaves no residue.

    Maybe just inspect the MAF sensor, and if it looks clean, leave it alone. They are expensive btw.
     
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  3. davecook89t

    davecook89t Senior Member

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    I would be worried about any residue that could be left on the sensor after spraying it with WD40. WD40 has many uses, one of them as a type of lubricant, which over time could gum up whatever it has been sprayed on, I believe. From my point of view, saving the few pounds that the official MAF sensor cleaner would cost is not worth the risk.
     
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  4. AzusaPrius

    AzusaPrius Member

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    I have used brake cleaner and it is said not to use it but my MAP sensor didnt bug out, just use the highest alcohol you find. The WD40 will attract dirt and the MAP sensor will fail sooner than before.

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  5. Mendel Leisk

    Mendel Leisk Senior Member

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    One of my previous jobs, the boss sprayed wd40 into his computer power supply fan, to quiet it down. The entire inside of the pc was kinda "rust proofed"...
     
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  6. JC91006

    JC91006 Senior Member

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    Do not use anything other than electronic cleaner or MAF sensor cleaner for the sensor.

    These sensors are not suppose to be cleaned on a regular basis. If you get an error for that sensor, you can try cleaning it. But if it's operating without any errors, you don't have to mess with it. In this case, don't fix it if it's not broken.

    +1 on Mendel, get another mechanic
     
    #6 JC91006, Jul 4, 2020
    Last edited: Jul 4, 2020
  7. JC91006

    JC91006 Senior Member

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    The OP is asking about a MAF sensor = Mass Air Flow sensor. You are talking about a MAP sensor = Manifold Absolute Pressure sensor
     
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  8. Mendel Leisk

    Mendel Leisk Senior Member

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    At least on 3rd gen, MAP sensor is pretty much swimming in oil, from the PCV.
     
  9. JerryScript

    JerryScript Junior Member

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    WD40 is used as a lubricant, but was actually developed to remove water, Water Displacement 40th formula. It is not recommended as a solvent to be used for any cleaning purpose.
     
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  10. AzusaPrius

    AzusaPrius Member

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    Ahh good catch.

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