2019 Prius and speed sensor issues?

Discussion in 'Gen 4 Prius Main Forum' started by George W, Apr 29, 2026 at 3:44 PM.

  1. George W

    George W Senior Member

    Joined:
    Mar 12, 2018
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    Location:
    San Antonio
    Vehicle:
    2008 Prius
    Model:
    Touring
    I've owned my 2019 Prius Limited now for about 2 weeks. Hadn't an issue until after I went through a car wash today. Dashboard lit up, check engine light, yellow triangle, multiple system warnings to contact the dealership, all while I'm going 70 down the highway.

    When I stopped at auto parts store for a code reader, it only came back with one trouble code, for a left wheel sensor. I guess all the other things that popped up were downstream from this error. b917ee71-ebe3-40bd-887b-50035994878d.jpg

    Does this mean I can no longer do drive-thru car washes, or could it just be a coincidence? By the way, the place I bought the car from is going to replace the sensor. They gave me a 30-day warranty on the whole car. Thanks everyone.
     
  2. BiomedO1

    BiomedO1 Senior Member

    Joined:
    Mar 27, 2021
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    Location:
    Left Coast
    Vehicle:
    2021 Prius Prime
    Model:
    LE
    Look for rodent chew marks on the wiring harness. The car driving through puddles, in the rain is equivalent to a car wash. If it happens again; I would follow the sensor wire up into the main harness. The bare wires probably shorted to ground and/or signal was intermittent.