Rear Speed Sensor - C0210 - Brake, VCS, ABS, (!)

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Cassie Matos, Jun 7, 2017.

Tags:
  1. Cassie Matos

    Cassie Matos Junior Member

    Joined:
    Sep 2, 2015
    5
    0
    0
    Location:
    San Jose, CA
    Vehicle:
    2010 Prius
    Model:
    II
    Hey everybody, to make a long post shorter, the bearings in my right rear wheel went bad and I had them replaced approximately 6 months ago. Fast forward to now I was doing my daily commute and the Brake, VCS, ABS, (!) lights came on. The brakes now have to be pressed a little harder but they still seem to function fine; just not as touchy. A buddy of mine works for snap-on so we used his scanner and these codes came up.

    U0151 - 763 Problem with CAN communication between airbag sensor assembly and power management control ECU

    U0155 - Lost communication with instrument panel cluster (IPC) control module

    P3107-213: Airbag ECU Communication circuit malfunction

    B1790: Airbag sensor assembly ECU communication circuit malfunction

    B2312 : Master switch of driver side door malfunction

    C0210 : Right rear wheel speed sensor signal fault

    After searching throughout the forums it seems the sensor is most likely the reason for the lights, but I'm having trouble finding out how to replace the rear sensor (front is easier I hear) I also read a thread that said we should replace the bearing as well since we'd have to remove it anyways, but with it being 6 months old I don't really see why that would be reasonable.

    Anyways, is this something that is a DIY for a handy guy? Do you agree that it is probably the sensor or do any of the other codes mean something more alarming to you? The car has had no big issues before these lights. Thanks a lot for any input as this has been very stressful.
     
  2. Raytheeagle

    Raytheeagle Senior Member

    Joined:
    Jul 1, 2016
    2,291
    2,371
    0
    Location:
    Fairfield, CA
    Vehicle:
    2010 Prius
    Model:
    II
    Have you gotten a chance to look at the sensor connection and see if it is loose? Inspect the wires for any damage (rodents, etc)? Are you using Techstream to retrieve the codes?

    The sensor is integrated into the hub assembly. I would look at the wires and the connection.
     
  3. tankyuong

    tankyuong Active Member

    Joined:
    Nov 9, 2012
    602
    139
    0
    Location:
    Central MO
    Vehicle:
    2010 Prius
    Model:
    III
    get a better bearing like timken next time,check your 12v battery too
     
  4. Cassie Matos

    Cassie Matos Junior Member

    Joined:
    Sep 2, 2015
    5
    0
    0
    Location:
    San Jose, CA
    Vehicle:
    2010 Prius
    Model:
    II
    I have not yet, I will try to look at the connections later today. We did just have it maintenenced at Toyota (while the lights were on) and they didn't find anything but I don't think they are that thorough. So if I just remove the tire I will be able to inspect the wire?

    - As a side note, the lights would be off when starting the car then would come on after driving a little bit. As of yesterday, the lights have continuously stayed on upon starting the car.

    Just curious what a better bearing do in this situation? I checked the 12v battery already it was fine. 12.6 at rest, 13.8-14 at ready. Didn't do a load test yet.
     
  5. ChapmanF

    ChapmanF Senior Member

    Joined:
    Mar 30, 2008
    4,479
    2,231
    0
    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    Five out of six of your codes have nothing at all to do with a speed sensor.

    Those battery voltage look fine, and I'm not a subscriber to the slightly-low-battery-causes-all-conceivable-codes school of diagnosis anyway.

    But looking at the collection you've got, I'd be thinking seriously about some more general issue affecting communication ... whether rodent damage to wiring, deteriorated ground points, some kind of interference-generating aftermarket equipment plugged in ... that sort of thing.

    -Chap
     
    Raytheeagle likes this.
  6. Cassie Matos

    Cassie Matos Junior Member

    Joined:
    Sep 2, 2015
    5
    0
    0
    Location:
    San Jose, CA
    Vehicle:
    2010 Prius
    Model:
    II
    Thanks for the reply every bit of insight helps. I think I got excited that it was the speed sensor since others found that theirs was bad and also had those lights. I took the wheel off anyway, didn't find anything in particular wrong with the sensor wire. Tried to reset the codes with the 4-13 short method, they didn't reset. We don't have anything aftermarket. Rodent damage and deteriorated ground points are still likely, but still haven't found anything.
     
Loading...