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No start 08

Discussion in 'Gen 2 Prius Technical Discussion' started by Sharnold, Sep 4, 2019.

  1. Sharnold

    Sharnold Active Member

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    2008 Prius no start condition p3190 on techstream could not reset dtc or get to start ideas? Also the airbox feed tube was collapsed? Air filter is new I'm thinking overfield with oil dirty mass airflow sensor or dirty throttle body. Also has the thermostat failure code

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  2. SFO

    SFO Senior Member

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    "If any other codes besides P3190, P3191 and/or P3193 are output, perform troubleshooting for those DTCs first."
     
  3. Sharnold

    Sharnold Active Member

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    I've never had a no start/not ready after clearing the codes on a p3190 also the HV battery was on the dreaded last purple line on the monitor in the car I think it went into limp mode and they drove off the HV till it died

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    #3 Sharnold, Sep 4, 2019
    Last edited: Sep 5, 2019
  4. dolj

    dolj Senior Member

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    Sorry for stating the obvious, and don't want to assume, was the HV battery recharged to at least 50 or 60% SoC before attempting a restart?
     
  5. Texas Hybrid Batteries

    Texas Hybrid Batteries Senior Member

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    99% of Gen2 no starts (Engine failed to start or poor engine power) will be caused by a fuel run out, dirty throttle body, or some piece of trash in the MAF. With the hybrid battery critically low you only get a few shots at a restart so don't waste them. Add 3 gallons of gas even if you think it's good, clean the intake and MAF sensor, and (this is important) disconnect the 12 volt battery for 60 seconds to reset fuel trims to factory. When you clean the MAF sensor remove it from the air box and shine a light down on the two sensing wires. Make sure there's nothing hung up in there. Spraying it off from above won't be good enough.

    A collapsed intake hose could point to a blockage. Attempt the restart with the hose disconnected from the air box just to be safe.
     
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  6. Skibob

    Skibob Senior Member

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    Airbox feed tube is collapsed? Wouldn’t that indicate a blockage upstream of it?
     
  7. Sharnold

    Sharnold Active Member

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    After posting this last night I looked back over the techstream data I also have a P0A0F code to go along with the P3190 I talked to the owner it originally started cutting out on him so he stopped at a part store and had them scan it with a generic obd2 and got the mass air flow sensor code he purchased one and while they inspected the engine bay noticed the air intake tube that connects to the side of the airbox was collapsed so they disconnected it he drove around 20 miles before it went into complete limp mode. I'm guessing 12volt needs to be disconnected mass sensor replaced and a good throttle body cleaning will fix these issues. I'll run a battery health check while it's there also.

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  8. Sharnold

    Sharnold Active Member

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    Problems solved
    1. Air resonator box not working properly leading too air intake induction pipe collapse
    2. Mass airflow sensor saturation with oil
    3. Throttle body gummed up not allowing butterfly to operate properly also oil saturation
    4. Intake also full of oil classic Gen 2 issue

    After cleaning mass airflow sensor, throttle body, intake, resetting dtc codes, and disconnecting 12volt battery car runs flawlessly.
    The intake is louder due to the resonator box being disconnected but it is not required and actually helps acceleration.
    Correct me about the intake resonator if I'm wrong but I've worked on wrecked Prius before and never replaced them
    20190905_181442.jpeg 20190905_181432.jpeg 20190905_180117.jpeg

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  9. dolj

    dolj Senior Member

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    My car works just fine with the resonator connected, so I'm curious as to what it is about this resonator that cause the air intake induction pipe to collapse. Can you identify what the problem is with the resonator box?

    BTW, would you have a photo of the collapsed induction pipe?
     
    #9 dolj, Sep 5, 2019
    Last edited: Sep 5, 2019
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  10. Raytheeagle

    Raytheeagle Senior Member

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    I’d like a photo too;).

    There shouldn’t be enough vacuum to collapse hard plastic:cool:.

    Unless something else about the resonator is amiss:whistle:?

    Pics help emensely (y).
     
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  11. Sharnold

    Sharnold Active Member

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    I will take a video or picture of the induction line collapsing tomorrow. Most likely the cause is due to a varmint building a nest in the box. Its basically there to pulse the air flow to the intake. When removed it just makes the classic cold air intake noise that most the ricers make when modified on acceleration. And yes disconnecting it will boost acceleration modestly not dramatically. You still have the primary filter to catch debris so it becomes more of a preference in my opinion. The only way I see it of any use is in the event of water up to the engine bay it would pulse most of the water into the induction box instead of the engine to save it from hydrolock

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  12. SFO

    SFO Senior Member

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    Not trying to steer this OT.

    Does anyone know the engine RPM resonance frequency band for a gen2 ?
     
  13. Sharnold

    Sharnold Active Member

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    Here's before car running and while cars running before it dies out 20190906_162229.jpeg 20190906_162307.jpeg 20190906_162312.jpeg

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  14. Skibob

    Skibob Senior Member

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    And no blockage upstream of that intake hose?
     
  15. Sharnold

    Sharnold Active Member

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    Blockage yes inspection cam shows rats nest in resonator jug

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  16. Skibob

    Skibob Senior Member

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    Why not remove the box, clean it out and reconnect it?
     
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  17. Sharnold

    Sharnold Active Member

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    Owner does not want to pay for anymore labor. He's already paid for a tow and me too replace and clean everything it's at his own discretion

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  18. Skibob

    Skibob Senior Member

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    Well....That’s a good reason. Guess he missed the part where if you couldn’t fix it he would have junked it rather than paying dealer repair prices. It is what it is.
     
  19. Sharnold

    Sharnold Active Member

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    It's a simple gen 2 repair but the stealership would be crying for a new throttle body labor and all sorts of stuff it didnt need

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