Speed Sensor ? warning lights

Discussion in 'Prius v Care, Maintenance and Troubleshooting' started by Tourswag, Aug 16, 2025 at 12:37 PM.

  1. Tourswag

    Tourswag Junior Member

    Joined:
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    Location:
    Arizona
    Vehicle:
    2013 Prius v wagon
    Model:
    Three
    2013 Prius V 95,000 miles - Arizona vehicle, no rain/snow/rust.
    Frequent wear of rubber parts.

    Yesterday ( 110º) while driving. and just after crossing over a speed bump at normal speed

    The Brake, Brake System, Traction Control and ABS icons lit up.

    Was ¼ mile from home seemed normal operation to driveway.


    First assumption is a front ( because of traction control) speed sensor

    Sound like barking up the right tree ?

    As luck would have it, was returning from having a procedure on dominant hand which will slow me down.

    What I plan: inspecting fuses & brake fluid level, inspecting wiring, removing and inspecting sensor pick ups for debris.

    Possible replace sensors.

    Comments, agree/ disagree welcome from someone who has experienced this or similar

    thanks, Mike
     
    #1 Tourswag, Aug 16, 2025 at 12:37 PM
  2. Mendel Leisk

    Mendel Leisk MMX GEN III

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    Vehicle:
    2010 Prius
    Model:
    Touring
    Could be purely electronic gremlins. I had a ScanGauge constantly connected to OBD, and started getting similar lights, plus what I like to call "work to rule" brakes, ie: they still work, but at first it feels like they're gone, it does take extra effort.

    This happened about 3 times, took to dealership each time, and with the last instance the mechanic pointed out his techstream connection to the obd kept dropping if he tapped the connection. Suggested I try disconnecting the ScanGauge, see if it helped.

    It did, problem never returned.
     
    #2 Mendel Leisk, Aug 16, 2025 at 12:43 PM
  3. Brian1954

    Brian1954 Senior Member

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    Vehicle:
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    Model:
    III
    You are only guessing that it is a speed sensor problem. The thing to do is use a scanner to read the trouble codes that the car is trying to tell you about. After you have the trouble codes, you can then plan how to fix the problem.

    If you do not have a scanner and the warning lights are still on, you can drive the car to an auto parts store that scans the car for free.
     
    #3 Brian1954, Aug 16, 2025 at 1:07 PM
  4. rjparker

    rjparker Tu Humilde Sirviente

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    If I had to guess without hooking up a capable scanner, I would say a speed sensor wire.
     
    #4 rjparker, Aug 16, 2025 at 1:15 PM
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