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P3190 and p3191

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by jolynf13, Sep 23, 2022.

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  1. jolynf13

    jolynf13 Junior Member

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    Got my inverter replaced by toyota warranty. Barely a month I got p3190 and p3191 with symptom somewhat identical to inverter problem, but this time it wont even go on drive mode and stay on neutral ICE shutdown after 2 seconds. I'm cleaning the maf sensor and throttle assembly checking all hoses for leaks.

    I need to chk fuel pump...is there a fuse or relay on the engine bay?...I dont see any on the diagram.

    3rd gen prius trim 2

    Posted via the PriusChat mobile app.
     
    #1 jolynf13, Sep 23, 2022
  2. bisco

    bisco cookie crumbler

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    How many miles on her?

    are those the only codes, what reader?

    I think you’re on the right track
     
    #2 bisco, Sep 23, 2022
    Last edited: Sep 23, 2022
  3. jolynf13

    jolynf13 Junior Member

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    140k miles...3rd gen prius, I'm just using a bluetooth OBD2 and apps.

    I'm just trying to chk everything, I have very little oil on my oil catch can but surprise to see some oil on throttle body thought that would be stop by installing a OCC.

    Anyway I'm cleaning the maf, throttle body, intake manifold and replacing the pcv valve....did my egr cleaning 6 month ago.

    How do I chk the condition of the fuel pump...I dont see any fuse or relay for fuel pump on engine bay

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    #3 jolynf13, Sep 23, 2022
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  4. ChapmanF

    ChapmanF Senior Member

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    It's served by the EFI MAIN fuse, which you find on the smaller "integration relay" contained in the fuse box: the black one, with four fuse positions showing on top. The relay is inside there, so using the active test in Techstream to say "please turn the fuel pump on" is really the easiest way to test that.

    If you pull that whole unit up out of the fuse box and look at the bottom, three connectors plug in, a single fat wire and two eight-pin plugs. Plug 1B is the one in the middle, and if you bring 12 volts to its pin 8, the fuel pump would run. Pin 8 is the last pin at the end where three wires in a row are red (in the 2010 diagram, anyway).

    I'm not sure that's any easier really than pulling up the access panel under the rear seat and bringing 12 volts to the connector there, which is probably what more people would do.
     
    #4 ChapmanF, Sep 24, 2022
  5. Mendel Leisk

    Mendel Leisk Senior Member

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    The Amazon cheapie?

    Even the higher rated ones won’t stop everything. A couple of decent quality ones in series can get quite effective.

    I think too: for the amount you see lingering in the intake manifold, perhaps a similar amount breezed right through, to the combustion chambers?
     
    #5 Mendel Leisk, Sep 24, 2022
  6. jolynf13

    jolynf13 Junior Member

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    OCC help a little, I agree with ur statement abt combustion chamber. Now I got to chk and clean egr

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    #6 jolynf13, Sep 24, 2022
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  7. jolynf13

    jolynf13 Junior Member

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    Done with cleaning maf, throttle body, intake manifold and egr ...changed oil...reinstall everything just to find out I got 1 bar on hybrid battery. Depleted

    Need to charge hybrid battery...anyone knows who do that in San Diego area?

    Posted via the PriusChat mobile app.
     
    #7 jolynf13, Sep 27, 2022
  8. bisco

    bisco cookie crumbler

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    i only know dealers do it, or you can buy a prolong kit
     
    #8 bisco, Sep 29, 2022
  9. jolynf13

    jolynf13 Junior Member

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    Checked prolong kit, they are expensive, I also see maxx volt, anyone have any experience with maxx volt? Do they come complete with the kit to recondition and balance the hybrid battery?

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    #9 jolynf13, Oct 9, 2022
  10. jolynf13

    jolynf13 Junior Member

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    Dealer wont do it, they tried selling me a hybrid battery for 4k

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    #10 jolynf13, Oct 10, 2022
  11. bisco

    bisco cookie crumbler

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    that is very odd, they did it for me
     
    #11 bisco, Oct 10, 2022
  12. bisco

    bisco cookie crumbler

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    i suppose you could pull the battery and do each module with a hobby charger
     
    #12 bisco, Oct 10, 2022
  13. jolynf13

    jolynf13 Junior Member

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    i found somebody in san diego to charge it, getting it back tomm. I suspect a faulty fuel gauge. its reading 1 bar less of having a full tank. I tried using a simple siphoning pump and i didnt get a drop of gas.

    i added 2 gallon {is that enough?]..and will try to get my engine to start tomm. If its the gauge then my fuel pump is working.

    how do i correct the gauge problem?
    is it better to replace the whole fuel pump?

    once i get it to start, and no more code, i plan on siphoning whatever is left of the 2 gallon. if i get more than 2 gallon then its the fuel pump.
    will keep u guys updated
     
    #13 jolynf13, Oct 16, 2022
  14. bisco

    bisco cookie crumbler

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    might need 3 gallons, i forget. should be in the o/m
     
    #14 bisco, Oct 16, 2022
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  15. jolynf13

    jolynf13 Junior Member

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    Got enough juice on my hybrid battery, added 2 more gallon gas...still no start still the same code.

    Still suspecting fuel delivery, I will siphone remaining gas and check fuel pump.

    Any other idea? I'm still getting same code and maf sensor code...I really dont want to drain this hybrid battery again


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    #15 jolynf13, Oct 17, 2022
  16. bisco

    bisco cookie crumbler

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    #16 bisco, Oct 17, 2022
  17. jolynf13

    jolynf13 Junior Member

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    Update...been busy at work suspecting a bad fuel pump I got a used one (ebay)..installation is pretty simple....and prius is now running.

    Thanks for all the help and my frequent research on this site helps a lot...

    Posted via the PriusChat mobile app.
     
    #17 jolynf13, Nov 8, 2022
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  18. bisco

    bisco cookie crumbler

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    congrats!
     
    #18 bisco, Nov 8, 2022
  19. douglasjre

    douglasjre Senior Member

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    is it still working ocrrectly since fuel pump install?
     
    #19 douglasjre, Jul 17, 2023
  20. jolynf13

    jolynf13 Junior Member

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    Same thing happen to me first inverter...replaced by toyota warranty then 2 months same code and I just replace my fuel pump...ebay.....it works

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    #20 jolynf13, Jul 17, 2023
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