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TPMS help

Discussion in 'Gen 2 Prius Technical Discussion' started by #1 Toyota salesman, Jul 15, 2018.

  1. #1 Toyota salesman

    #1 Toyota salesman Member

    Joined:
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    GSP, SC
    Vehicle:
    2007 Prius
    Model:
    Two
    I've had and driven the car for nearly 10k
    Went on another 900 mile road trio they other day, decided to check the air in the tires
    They were essentially cold, but they were a few psi bigger than I'd like them to be (don't recall offhand, but fr 2psi higher, as they should be)
    anyway going on about my road trip, and about 300 miles in the tire pressure light goes off on the dash. Check them all, they're all where they were earlier, in relation to one another, with one of them .5 PSI higher.
    Anyway...more The TPMS light is always on...I have reset it 2x now, it came, and now it is just on

    95° out

    41 41



    39 39.5


    This is still lower than when I first checked last week

    Bad sensor on one of the wheels? Is it all just coincidental timing?

    Posted via the PriusChat mobile app.
     
    #1 #1 Toyota salesman, Jul 15, 2018
  2. ChapmanF

    ChapmanF Senior Member

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    Vehicle:
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    IV
    Plug in Techstream and look at the data. It will show you what pressure, temperature, and battery life it is reading in each of the four tires, plus codes for any problems noted. That should give you plenty to see what the trouble is.

    -Chap
     
    #2 ChapmanF, Jul 15, 2018
  3. #1 Toyota salesman

    #1 Toyota salesman Member

    Joined:
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    Vehicle:
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    Two
    Cool...I wasn't sure how the TPMS worked in these cars...
    As you know, some cars use the ABS reluctor/etc, and sense the rotational difference. While some actually measure psi

    Posted via the PriusChat mobile app.
     
    #3 #1 Toyota salesman, Jul 15, 2018
  4. ChapmanF

    ChapmanF Senior Member

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    IV
    Also, when signed in to techinfo.toyota.com, there is a manual available there called the New Car Features manual, which is just the thing if you are a new Prius owner and curious about the various systems in the car, what they're for, what they do, and how they do it.

    -Chap
     
    #4 ChapmanF, Jul 15, 2018
  5. srellim234

    srellim234 Senior Member

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    Touring
    Weakening or dead battery in one of the sensors? They probably should be replaced every 5-7 years.
     
    #5 srellim234, Jul 15, 2018
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