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PCS warning keeps coming on

Discussion in 'Gen 3 Prius Technical Discussion' started by pfarris, May 19, 2012.

  1. pfarris

    pfarris New Member

    Joined:
    May 19, 2012
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    Location:
    Missouri
    Vehicle:
    2010 Prius
    Model:
    Five
    I have 2010 Prius with adv tech package. Off and on the PCS warning light comes on when I start the car. I have checked the switch below the dash and it is engaged. has anyone else had this problem. I am over 36000 miles so the cost to fix this will be on me if I go to the dealer.

    HELP!!!!!!
     
    #1 pfarris, May 19, 2012
  2. mad-dog-one

    mad-dog-one Prius Enthusiast

    Joined:
    Dec 31, 2009
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    420
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    Location:
    Whereabouts Unknown
    Vehicle:
    2017 Prius Prime
    Model:
    ----USA----
    We had the PCS warning engage a low-level warning, without braking, when we drove over a concrete bulge in an asphalt highway and once when driving in the rain. We were able to repeat the error by driving over the bulge, repeatedly. The false alarms were fixed by adjusting the aim of the radar sensor slightly upward, and all else seems to be working fine. The service manual calls for the radar to be aimed half a bubble above horizontal and ours was aimed about half a bubble below horizontal.
     
    #2 mad-dog-one, May 19, 2012
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