Prius v (lowercase v for the Prius v wagon)... Vacuum Switching Valve Fault Killed Engine...

Discussion in 'Prius v Care, Maintenance and Troubleshooting' started by David Warshaw, May 10, 2016.

  1. David Warshaw

    David Warshaw Junior Member

    Joined:
    Jan 9, 2013
    9
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    Vehicle:
    2012 Prius v wagon
    Model:
    Two
    My 2012 Prius v (lowercase v for the Prius v wagon) (~80,000) bucked/almost stalled at the hybrid/gas motor handoff when starting to roll (very low speed). Check Engine light came on. I drove home (60 miles, highway) using the POWER MODE without problem. Next morning, on my way to take car to service, several warning lights came on. I began to travel, and apparently the car was in EV mode only, which drained the batter. Car crapped out on a highway entry ramp. It started up after several tries and I was able to get to the dealership.

    Was told diagnosis would cost $127.00. BUT... when service tech called, I was told problem was VACUUM SWITCHING VALVE shorted out the system. AND... THANKFULLY... there was a service bulletin on this issue so the replacement/repair was done under warranty at no cost. Had to send out for part, but was provided a loaner vehicle, so was not inconvenienced. Got car back next day.

    Tech said although this is a known fault, it is not frequent enough for a recall; although there is quite a bit of risk should this happen when the car is on the highway, or -- as in my case -- on a blind-curve entrance ramp.
     
  2. Chazz8

    Chazz8 Gadget Lover

    Joined:
    Sep 19, 2008
    744
    234
    61
    Location:
    Central New York
    Vehicle:
    2012 Prius v wagon
    Model:
    Five
    Were there any error codes on your service write-up that you can share with PriusChat that members can use to diagnose this problem?
     
  3. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    95,253
    43,192
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    thanks for the heads up. tsb's vs recall's are strange bedmates. unfortunately, in the big picture, car makers are not concerned about the possibility of a few accidents/injuries/deaths, compared to the cost of a recall.
     
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