1. Attachments are working again! Check out this thread for more details and to report any other bugs.

2009 Prius Electronic Braking Warning Light

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by skarim, Nov 27, 2012.

  1. skarim

    skarim Junior Member

    Joined:
    Nov 27, 2012
    3
    0
    0
    Vehicle:
    2009 Prius
    Model:
    N/A
    Hi ,

    I have a 2009 with 34,000 miles.

    About 3 times in the last month or so, the amber electronic braking warning light has come on, then turned off by itself a couple of days later. After the second time, I brought it to the dealer, but they said that no codes were set off and they couldn't find any problem.

    Has this happened to anyone before, or know what may be the issue?

    Thanks,
    SK
     
    #1 skarim, Nov 27, 2012
  2. Patrick Wong

    Patrick Wong DIY Enthusiast

    Joined:
    Mar 8, 2008
    18,200
    6,482
    0
    Location:
    Green Valley, AZ
    Vehicle:
    2015 Prius
    Model:
    Two
    How about taking a sharp photo of the warning light(s) next time it(they) appear(s) so that we can see exactly which light(s) you are referring to.
     
    #2 Patrick Wong, Nov 27, 2012
    [email protected] likes this.
  3. skarim

    skarim Junior Member

    Joined:
    Nov 27, 2012
    3
    0
    0
    Vehicle:
    2009 Prius
    Model:
    N/A
    Here is a photo

    Thanks for the replies.
    SK IMAG0270.jpg
     
    #3 skarim, Nov 28, 2012
  4. archae86

    archae86 Member

    Joined:
    Jun 19, 2008
    153
    24
    0
    Location:
    Albuquerque, NM
    Vehicle:
    2006 Prius
    tire pressure warning, not a brake problem.
     
    #4 archae86, Nov 28, 2012
  5. Patrick Wong

    Patrick Wong DIY Enthusiast

    Joined:
    Mar 8, 2008
    18,200
    6,482
    0
    Location:
    Green Valley, AZ
    Vehicle:
    2015 Prius
    Model:
    Two
    I agree. A low tire pressure warning is not going to set a DTC.

    Check the tire pressure on all four tires and if necessary reset the tire warning system for the pressure that you use. Consult the owner's manual if necessary to learn about this process.
     
    #5 Patrick Wong, Nov 28, 2012
  6. KJ Fitz

    KJ Fitz Junior Member

    Joined:
    Sep 14, 2016
    55
    21
    0
    Location:
    Guam
    Vehicle:
    2015 Prius
    Model:
    Three
    Also, excessively low pressure in the spare will trip that light on. I discovered mine was 30 PSI, aired it up, light went right out!
     
    #6 KJ Fitz, May 12, 2017
  7. andrewclaus

    andrewclaus Active Member

    Joined:
    Sep 15, 2009
    993
    325
    0
    Location:
    Golden, CO
    Vehicle:
    2007 Prius
    Priuses in the US do not have a sensor in the spare tire. But it sure is a good idea to check it regularly.

    My friend's RAV4 has a sensor in the spare which would light up on cold days and it bugged him to no end until I hooked up my Mini VCI and found the fifth sensor in the spare.
     
    #7 andrewclaus, May 13, 2017
  8. Mendel Leisk

    Mendel Leisk EGR Fanatic

    Joined:
    Oct 17, 2010
    56,678
    39,222
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    You should be able to tell by just looking at the valve stem on the spare, if it has tpms sensor or not. TPMS equipped valve is metal, and regular valve is black rubber.
     
    #8 Mendel Leisk, May 13, 2017
  9. Mendel Leisk

    Mendel Leisk EGR Fanatic

    Joined:
    Oct 17, 2010
    56,678
    39,222
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Is your spare perhaps a full-size, or compact? If full-size, then it is likely to have the sensor.
     
    #9 Mendel Leisk, May 13, 2017
(You must log in or sign up to post here.)