PKSB flashing indicator frequently on - rainy conditions?

Discussion in 'Gen 4 Prius Care, Maintenance and Troubleshooting' started by David Nelson, Jan 16, 2021.

  1. David Nelson

    David Nelson New Member

    Joined:
    Jan 16, 2021
    2
    0
    0
    Location:
    Washington
    Vehicle:
    2019 Prius
    Model:
    XLE AWD-e
    The PKSB indicator flashes on the dash frequently on our 2019 Prius XLE AWD-e. The dealer says everything is fine and that it may come on anytime there is inclement weather. Given the frequency of rain in the Seattle area, that means often. They offered to "change the sensitivity" of the sensor, but I don't think they did because it wouldn't come on the (dry) day we took it in.

    They suggested cleaning the sensors off, which I did. No light when I took it to the dealer. The light came on again on my way home from the dealer when it was showery.

    I wouldn't have a problem with this if it was just a solid light indicating that the system was off, but it flashes constantly. A flashing light indicates to me there is a problem that needs to be fixed. I have figured out how to turn it off, which leaves the light on but not flashing.

    Anyone else dealing with something like this?
     
  2. jerrymildred

    jerrymildred Senior Member

    Joined:
    Oct 28, 2016
    9,460
    11,548
    0
    Location:
    Tampa, FL
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Premium
    Welcome to PC. I just noticed your post. It's odd that I seem to be the first to respond after all these days, but here's my 2 cents worth. My wife's 2017 has that feature. A while back, we drove her car from central Ohio to eastern Iowa. Half the distance was in the rain. The light never flashed. It's been driven lots of other times in the rain. Never a hit of a problem. Something's definitely wrong with one of your sensors and it shouldn't be too hard for the dealer to chase it down.
     
    David Nelson likes this.
  3. thomassster

    thomassster Member

    Joined:
    Nov 2, 2015
    143
    46
    0
    Location:
    Colorado, US
    Vehicle:
    2019 Prius
    Model:
    XLE AWD-e
    I acutally have a 2019 AWDe XLE as well. it is true that it may go on during inclement weather. I always get it when I get excessive snow/ice. From what I recall though, the software turns that feature off for that trip (I thought). BUT doesn't rule out if you have an overly sensitive sensor. I'm assuming you are only getting this issue with ugly weather, but if this is happening at other times, it could be an issue. With dealers, they are going to push back on these types of issues, especially when it's part of the warranty period. You may have to continuously push them with this if they are resisting.
     
    David Nelson likes this.
  4. David Nelson

    David Nelson New Member

    Joined:
    Jan 16, 2021
    2
    0
    0
    Location:
    Washington
    Vehicle:
    2019 Prius
    Model:
    XLE AWD-e
    Ours seems to go on any time it rains and stays continues to flash for most of the trip, though it may stop intermittently. I'm in the process of documenting the activity and weather conditions when it happens now.

    I really wouldn't mind if it was a solid light just letting me know, but the flashing makes it seem like there is a problem.
     
    #4 David Nelson, Jan 19, 2021
    Last edited by a moderator: Jan 25, 2021
  5. MIkeDr

    MIkeDr Junior Member

    Joined:
    Sep 16, 2020
    96
    54
    0
    Location:
    Seattle, WA
    Vehicle:
    2020 Prius
    Model:
    XLE AWD-e
    We live in Seattle, too, and have a 2020 AWD-e XLE. I have never seen that light go on, and we’ve of course driven quite a bit in the rain.

    the backup camera though is worthless in the rain... of the half dozen vehicles I’ve owned with backup cameras, I never recall having issues with water on the lens as much as we do with the Prius. Poor placement presumably.
     
    David Nelson likes this.
  6. AzWxGuy

    AzWxGuy Weather Guy

    Joined:
    May 22, 2011
    778
    379
    0
    Location:
    Tucson, AZ
    Vehicle:
    2021 Prius
    Model:
    Limited
    You might want to consult your owner's manual. I have 12 pages in mine that describe the functions and various (numerous) malfunctions of the PKSB system. In just normal driving around in clear weather I've seen mine blink and buzz when in close proximity to another vehicle with those little ultrasonic detectors on it. It also likes to detect my recycle bin stationed near the front drivers side of the car when I'm pulling in to my carport. It will give me distance estimates to the obstruction, which is interesting. The owner's manual warnings make it very clear that the sensor array needs to be kept very clean, and looking closely at a sensor I see an isolator ring around the sensor where dirt could accumulate. You might want to check all of those, especially up front where insect debris may accumulate.
     
  7. thomassster

    thomassster Member

    Joined:
    Nov 2, 2015
    143
    46
    0
    Location:
    Colorado, US
    Vehicle:
    2019 Prius
    Model:
    XLE AWD-e
    I think the OP understands what the manual says, but is determining an issue of potential over sensitivity. Cleaning the sensors is one thing, but one cannot clean the sensors when inclement weather hits and you are driving and driving and still a ways away from your destination. I’ve seen these sensors cause flashing indicator during snow but never rain. What I think to do is monitor if this happens again and determine which sensor might be causing this flashing and see how often this occurs. If it occurs with multiple sensors, maybe decrease the sensitivity.
     
    AzWxGuy likes this.
Loading...