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P lock abnormal

Discussion in 'Gen 2 Prius Main Forum' started by franken1313, Oct 10, 2017.

  1. franken1313

    franken1313 Member

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    My prius will NOT start. I'm getting a message on the screen that says P lock is abnormal park in flat surface & apply brake.
    1st I rarely got this message & after turning on & off the car, the car would turn back on but now it won't turn on at all.
    I have already bought a new 12v battery & that did not work. I have disconnected the computer inside the hybrid battery. I have looked at fuses. I have a plied the brake a bunch of times. My car still will not turn on. HELP
     
    #1 franken1313, Oct 10, 2017
  2. jerrymildred

    jerrymildred Senior Member

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    Is the battery you put in fully charged? Many, if not most, are not.

    Also, you could try this.
    It apparently worked for some people.
     
    #2 jerrymildred, Oct 10, 2017
  3. franken1313

    franken1313 Member

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    Yes I bought 2 batteries. 1 from Toyota & another from oreilys bc I thought maybe the battery from oreilys was just faulty
     
    #3 franken1313, Oct 10, 2017
  4. bisco

    bisco cookie crumbler

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    how do you know it is charged?

    also, check the hatch to make sure it's fully closed.
     
    #4 bisco, Oct 10, 2017
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  5. ChapmanF

    ChapmanF Senior Member

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    It sounds like you've tried a lot of things, but one I didn't see on the list was signing in at techinfo.toyota.com to pull up the repair manual and see what it says about tracking down the cause of "P lock abnormal". The information in there is usually pretty good.

    -Chap
     
    #5 ChapmanF, Oct 10, 2017
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  6. franken1313

    franken1313 Member

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    I recharged it with a battery charger & checked it with a multi meter
     
    #6 franken1313, Oct 10, 2017
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  7. franken1313

    franken1313 Member

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    I am currently pressing the brake. Does the TAIL mean the brake?

    20171010_120004.jpg
     
    #7 franken1313, Oct 10, 2017
  8. ChapmanF

    ChapmanF Senior Member

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    TAIL just tells you whether the taillights (first position of headlight switch) are on. The only reason the display headunit even knows that is so it can change the color/brightness of the display at night.

    -Chap
     
    #8 ChapmanF, Oct 10, 2017
  9. franken1313

    franken1313 Member

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    So my problem wouldn't be the brake light switch?
     
    #9 franken1313, Oct 10, 2017
  10. jerrymildred

    jerrymildred Senior Member

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    The brake light switch turns on the brake lights. So, if the brake lights come on, the brake light switch is working.
     
    #10 jerrymildred, Oct 10, 2017
  11. franken1313

    franken1313 Member

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    Yes brake lights do come on
     
    #11 franken1313, Oct 10, 2017
  12. ChapmanF

    ChapmanF Senior Member

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    I'd recommend just going straight to checking the things the repair manual says to check for that issue. Guessing takes time and doesn't fix the car.

    -Chap
     
    #12 ChapmanF, Oct 10, 2017
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  13. fotomoto

    fotomoto Senior Member

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    The only time I've seen this message is when I tried to put car in gear while in accessory mode. Try pushing brake and pushing power button twice and see if that gets you to ready mode.

    Did you latch the orange safety plug correctly? It's a 3 step process: push in, flip up, and then push down. Many don't know to do the last step.
     
    #13 fotomoto, Oct 10, 2017
  14. franken1313

    franken1313 Member

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    I don't have a repair manual. Is there one I can download online?
     
    #14 franken1313, Oct 11, 2017
  15. franken1313

    franken1313 Member

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    Where in the service manual do I look for the P lock abnormal?
     
    #15 franken1313, Oct 11, 2017
  16. ChapmanF

    ChapmanF Senior Member

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    You bet. It's at techinfo.toyota.com and once you've registered, $15 gets you into the whole library for two days at a time. (And by the whole library, I don't just mean the full repair manuals and wiring diagrams for any Toyota out there, but also a whole section of Quick Technical Guides on different topics, all the service bulletins and warranty enhancements, and the course books for the "University of Toyota" technician training courses ... as deep as you ever want to go.)

    I would start in the Diagnosis section for the Hybrid Transaxle.

    You can sort of tell the times I've dropped another $15 into techinfo to look something up for myself, because then I give more in-depth answers to other people's PriusChat questions for about two days until the access runs out. :) But right now I haven't re-upped for a while, so I can't look around in there and direct you further. The P lock is, of course, a function of the hybrid transaxle and the transmission control ECU, and that diagnosis section would be my first place to look.

    -Chap
     
    #16 ChapmanF, Oct 11, 2017
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