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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

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    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

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    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
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  3. skarim

    skarim Junior Member

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    Here is a photo

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

    archae86 Member

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    tire pressure warning, not a brake problem.
     
    #4 archae86, Nov 28, 2012
  5. Patrick Wong

    Patrick Wong DIY Enthusiast

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    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

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    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

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    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 Senior Member

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    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 Senior Member

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    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
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