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Low Tire Pressure indicator intermitantly comes on.

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Fireplug, Jul 9, 2019.

  1. Fireplug

    Fireplug Junior Member

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    Location:
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    Vehicle:
    2007 Prius
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    Two
    While driving at highway speeds, the low pressure light will intermittently come on every once in a while and then go off fairly quick. I can go several days without it coming back on, not sure what would cause this .
     
    #1 Fireplug, Jul 9, 2019
  2. RobertK

    RobertK Member

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    You might have a tire that is marginally low. The tire warms up as you drive, causing the air pressure to rise above the low pressure threshold and turning off the light

    Set all of your tires to the correct pressure after the car has not been driven for 6+ hours, then reset the TPMS using the button under the steering column. If you don't have a tire inflation device at home, set the pressure 5-8 lbs. over the cold setting at a gas station and then check them after the car has not been driven for 8+ hours. You can bleed the tires down to the desired values and reset the TPMS.

    If the TPMS light is flashing, you may have a bad TPMS sensor. The life of a TPMS sensor battery is about 10 years or 100k miles. If you have access to Techstream you can check the battery level in the sensors.
     
    #2 RobertK, Jul 10, 2019
    Fireplug and Mendel Leisk like this.
  3. Mendel Leisk

    Mendel Leisk Senior Member

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    Good answer.
     
    #3 Mendel Leisk, Jul 10, 2019
    Last edited: Jul 10, 2019
  4. Fireplug

    Fireplug Junior Member

    Joined:
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    Location:
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    Vehicle:
    2007 Prius
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    Two
    I just took your advice, will wait and see if that corrects it. Thanks.
     
    #4 Fireplug, Jul 11, 2019
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