scantool confusion

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by david.martin8866, Apr 13, 2026 at 6:23 PM.

  1. david.martin8866

    david.martin8866 New Member

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    2012 Prius
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    Two
    Greetings folks,

    New here posting but have spent hours reading. 2012 Prius 2 was heating up on hills 155k from info here replaced engine water pump (Aisin part) easy fix.
    Traction light has been on solid no codes set I can see with a Scan Gauge 2. Would like to see wheel speed sensors and any faults the SG can't see. Ordered the BT adapter recommended by DrPrius for Android tablet. The software is confusing me a bit as DP seems to be about HV battery health and I am looking for data from controllers that effect the traction control system. I don't think the regen is working but read that system is disabled when the TCS light is set. I will be doing brakes and control arms soon and would like to take care of wheel sensors then if needed.

    A couple hundred for software would be fine.......Thanks Dave
     
    #1 david.martin8866, Apr 13, 2026 at 6:23 PM
  2. Brian1954

    Brian1954 Senior Member

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    #2 Brian1954, Apr 14, 2026 at 6:04 PM
    Last edited: Apr 14, 2026 at 10:22 PM
  3. cdherman

    cdherman Junior Member

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    Location:
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    Vehicle:
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    Two
    I did a lot of reading when one of my daughters cars sensor was acting up -- the codes may often show as "dirty sensor" or something like that, BUT generally, it seems to mean that the wheel bearings are going out. And go out they do, especially after 10 years and 150k miles. On the 2011, and 2014 Prius in my family, 3 of 4 rear WB and 2 of 4 front have died. All in the 140-160k range.

    In short, even if the code says sensor problem, there is an excellent chance the sensor is dirty because of internal problems. Or so was my experience.

    Your first post seems pretty correct in my limited experience. Good luck and welcome to the forum.....
     
    #3 cdherman, Apr 15, 2026 at 11:42 AM
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