MAP sensor cleaning

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by AzusaPrius, Jul 4, 2020.

  1. AzusaPrius

    AzusaPrius Senior 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.

    Mod Edit: Spun off from this thread: https://priuschat.com/threads/maf-sensor-cleaning.217669
     
    #1 AzusaPrius, Jul 4, 2020
    Last edited by a moderator: Mar 27, 2024
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  2. 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.
     
    #2 Mendel Leisk, Jul 4, 2020
  3. AzusaPrius

    AzusaPrius Senior Member

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    Ahh good catch.

    Posted via the PriusChat mobile app.
     
    #3 AzusaPrius, Jul 4, 2020
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  4. redprius2011

    redprius2011 Junior Member

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    can i clean it with MAF cleaner?
     
    #4 redprius2011, Mar 25, 2024
  5. Mendel Leisk

    Mendel Leisk Senior Member

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    That’s what I used; mighta been overkill. There appears to be 2 kinds. On our ‘10 it has what looks like a small resistor, in a plastic cage.. Later years, there’s nothing showing.
     
    #5 Mendel Leisk, Mar 25, 2024
  6. redprius2011

    redprius2011 Junior Member

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    can oily MAP cause engine to stay ON and increase RPM while running with ICE and breaking on speed bumps? im going to clean it with CRC MAF cleaner if it doesn't hurts the sensor.
     
    #6 redprius2011, Mar 26, 2024
  7. Mendel Leisk

    Mendel Leisk Senior Member

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    I doubt it, mainly because oil in the intake manifold happens fast, with the PCV dumping in right there. Even an oil catch can doesn’t completely stop it. So oil-soaked MAP sensor is "situation normal".
     
    #7 Mendel Leisk, Mar 26, 2024
    Last edited: Mar 26, 2024
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