oil pressure reading

Discussion in 'Gen 3 Prius Technical Discussion' started by ED9593, Jan 25, 2012.

  1. ED9593

    ED9593 Junior Member

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    Can I read oil pressure on my scan gauge II ? If so, how do I do it?
     
  2. tumbleweed

    tumbleweed Senior Member

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  3. ken1784

    ken1784 SuperMID designer

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    There is no oil pressure sensor on the Prius, therefore there is no way to know the pressure.

    [email protected]
     
  4. jdcollins5

    jdcollins5 Senior Member

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    The Repair Manual only shows an oil pressure switch and not a sensor.
     
  5. MrBillTulsa

    MrBillTulsa Member

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    Use a "T", add a sender and a guage?

    :eek:
     
  6. El Dobro

    El Dobro A Member

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    Yep.
     
  7. LTZR1

    LTZR1 Member

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    Even better, use a "T" FORGET the sender and run a nylon line to
    a mechanical gauge. They're usually much more accurate and instant in responding to oil pressure.
     
  8. MrBillTulsa

    MrBillTulsa Member

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    Maybe more instant in responding to changes, and maybe slightly more accurate, but not much in either case; and only then when properly installed and bled (purged of air).

    My biggest concern with wet guages is the possibility of leak fail, due to added lines, fittings, vibrations, etc. Think airplane - oil loss puts you on the ground, period.

    :eek:
     
  9. jdenenberg

    jdenenberg EE Professor

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    I added a "T", a sender and an oil gauge to my 1966 mustang a few years back. It warned me of a drop in oil pressure in time to save the engine. The only drawback was that the oil leak was at the "T".

    JeffD
     
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  10. LTZR1

    LTZR1 Member

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    We've installed mechanical gauges on various vehicles for over twenty years and have never experienced a failure or problem of any kind.

    Properly installed high quality gauges and accompanying fittings pose absoutely no problems whatsover. They are MUCH more accurate that most electrical gauges in our experience.
     
  11. Old Bald Guy

    Old Bald Guy Old Bald Guy

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    Here's a thought. What good is an oil gauge going to do on an engine that doesn't run continuously? Driving here in the Dallas metro, my motor starts and stops FREQUENTLY. I suspect you would probably get dizzy watching the gauge go up and down.

    Why in the heck, with modern oil and motor technology, would anyone want an oil pressure gauge on a Prius?

    I was a licensed mechanic 40 years ago when oil pressure gauges were important ... and engines didn't shut off every time you took your foot off the gas pedal.
     
  12. tumbleweed

    tumbleweed Senior Member

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    I think I would be more interested in knowing oil temperature than oil pressure. I would like to know how it tracks coolant temperature and if 0W20 oil really runs cooler than thicker oils.

    But it would just be to satisfy my curiosity I don't expect any lubrication related problems.
     
  13. jdcollins5

    jdcollins5 Senior Member

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    I think you just explained exactly why Toyota did not provide the oil pressure signal nor the tachometer signal. Can you imagine all of the questions and complaints they would have received when the tachometer varied all over the place at constant speed and both the tachometer and the oil pressure went to zero every time the ICE stopped ? :confused:
     
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  14. tumbleweed

    tumbleweed Senior Member

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    Actually there is a tachometer signal available in addition to the one on the ODB, here is a thread http://priuschat.com/forums/gen-iii-2010-prius-technical-discussion/73707-tach-signal.html
     
  15. jdcollins5

    jdcollins5 Senior Member

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