Tire Pressure Indicator Issue

Discussion in 'Prius v Care, Maintenance and Troubleshooting' started by Phil Kennelty, Dec 3, 2018.

  1. Phil Kennelty

    Phil Kennelty New Member

    Joined:
    Dec 3, 2018
    1
    0
    0
    Location:
    Long Beach NY
    Vehicle:
    2012 Prius v wagon
    Model:
    N/A
    Recently my tire pressure indicator idiot light on the dashboard has been on, blinking when I start the car and remaining on as long as the engine is on. Repeated checks of my tires show that the pressure in each of the tires is approximately 30 psi, as it should be. Any ideas on what could be the issue?
     
  2. wjtracy

    wjtracy Senior Member

    Joined:
    Sep 19, 2006
    10,377
    3,032
    1
    Location:
    Northern VA (NoVA)
    Vehicle:
    2006 Prius
    First 30 psia is a little low...possibly that is low enough to set off the warning light. I'd try putting more pressure in the tires and hitting the RESET button.

    Otherwise, you might have lost a battery in one of the TPMS sensors, which requires a new TPMS sensor inside the tire, or live with the warning light as many do. Mine lasted 9 years but yours could be shorter life especially if you put a lot of miles on.
     
  3. fuzzy1

    fuzzy1 Senior Member

    Joined:
    Feb 26, 2009
    11,408
    5,170
    90
    Location:
    Western Washington
    Vehicle:
    2012 Prius
    Model:
    Three
    If the light blinks for one minute, then stays on solid, it means that one or more sensors are not being picked up (e.g. dead sensor battery), or some other system malfunction. My 2012 as had sporadic problems the past year with warnings while the pressures are good (both summer and winter wheel sets), but not frequently enough for me to track down the issue. At least the new ScanGauge firmware tells me which sensor is not reading, and I think it corresponds to my right-front wheel on this summer set. Hasn't repeated on the winter set since that firmware upgrade.

    If a tire is actually reading low, I'm not sure if it blinks continually, or stays solid from the start. But it should be different than the above pattern.
    That is too low for 15" wheels. I don't recall the recommended pressure for 17", but didn't think they were that low either.
     
  4. mikefocke

    mikefocke Prius v Three 2012, Avalon 2011

    Joined:
    Nov 3, 2012
    2,288
    871
    0
    Location:
    Sanford, NC
    Vehicle:
    2012 Prius v wagon
    Model:
    Three
    30 PSI would give you unresponsive handling, outer edge tire wear as well as poor MPG. I run mine at 42/40 and for many here that is low. Even my wife's plushmobile at 36.
     
  5. ChapmanF

    ChapmanF Senior Member

    Joined:
    Mar 30, 2008
    6,190
    3,952
    0
    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    Where are you getting the information for how it should be? I think the placard on your door jamb probably says 35 in front and 33 rear, doesn't it?

    30 is probably not low enough to trigger the warning light, but once the warning light is triggered, you'll need to go higher than that before it will go out. So if there was an especially cool day and the pressures went a little lower, enough to trigger the light, then it warmed a bit and now they show 30, you'll still have the light. Just air the tires back up to the correct 35 and 33 or so, and it should go out after a bit of driving.

    This is assuming you have nothing else wrong with the system. Normal behavior is the light comes on for six seconds when you turn the car on, then goes out, then comes back on steady if you have a low pressure warning. Is that what's happening (what you called blinking when you start the car)?

    The SET button under the dash shouldn't be anything you would normally futz with. Its only purpose is to change the pressure limit programmed into the system for the warning. If the programmed limit is right, there's nothing to gain by pushing the button.

    -Chap
     
  6. Robertto09

    Robertto09 Junior Member

    Joined:
    Nov 12, 2015
    38
    14
    0
    Location:
    Costa Rica
    Vehicle:
    2004 Prius
    Model:
    Two
    Someone knows some application to measure the pressure of the tires by bluetooth?

    Posted via the PriusChat mobile app.
     
  7. Salamander_King

    Salamander_King Senior Member

    Joined:
    Nov 8, 2015
    1,997
    1,486
    0
    Location:
    New England
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Premium
    Robertto09 likes this.
  8. RRxing

    RRxing Senior Member

    Joined:
    Jul 7, 2009
    1,916
    1,156
    0
    Location:
    Long Island, NY
    Vehicle:
    2017 Prius
    Model:
    Three Touring
    Carista does as well...
     
  9. Robertto09

    Robertto09 Junior Member

    Joined:
    Nov 12, 2015
    38
    14
    0
    Location:
    Costa Rica
    Vehicle:
    2004 Prius
    Model:
    Two
    Ok thanks you,I will try it


    Posted via the PriusChat mobile app.
     
Loading...