TPMS light should be OFF

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Frontporch, Dec 16, 2025 at 4:01 PM.

  1. Frontporch

    Frontporch Active Member

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    I replaced my TPMS sensors in each tire this summer.... Worked without issue for months.

    The light is now on and I immediately assumed that a cheap sensor was bad. Connected techstream and saw several pressure values. All seemed reasonable. It looks like the Low threshold (sorry I dont remember the name) was around 26 PSI. I think all of my tires were around 31-34 PSI and some other indicator pressure (there were four values) were all slightly different but very high... 28-30.

    I would like to do a sensible reset of this system. If I verify all cold pressures are around 35PSI should I be able to use the TPMS reset to get that light off? Not really sure how it works. I didn't find it in the owner's manual at first glance. I also saw temp readings that were similar to the outside temp 30 degrees. I hope cold is good for a reset.

    Thanks!
     
    #1 Frontporch, Dec 16, 2025 at 4:01 PM
  2. bisco

    bisco cookie crumbler

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    idk, but definitely put a gauge on the tyres, cold makes the pressure drop
     
    #2 bisco, Dec 16, 2025 at 4:09 PM
  3. Brian1954

    Brian1954 Senior Member

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    Post a picture taken of the Techstream data for the tire sensors.
     
    #3 Brian1954, Dec 16, 2025 at 6:25 PM
  4. Tombukt2

    Tombukt2 Senior Member

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    Thot in very 28 the tire info.is on main screen .the screen that shows health at top . Tells me what ea sensor is reading by number 1234
     
    #4 Tombukt2, Dec 16, 2025 at 8:57 PM
  5. priumium

    priumium Member

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    Do a health check and validate if you have a current or historical TPMs code.

    Light will stay on with historical codes, for example if one sensor went into sleep mode and did not communicate within 20mins, dtc is set and the light will be on for 20 cycles apx, unless cleared.

    None of your mentioned values are below 26, so seems ok unless the temperature sensor part is invalid/wrong.

    Your described concept for resetting the minimum threshold value is correct, however it will unlikely remove the light. Check the actual reason is step one, especially since you have TS ready!
     
    #5 priumium, Dec 17, 2025 at 4:54 AM
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