Smart Key System Troubleshooting

Discussion in 'Prius v Care, Maintenance and Troubleshooting' started by micltho1, Mar 25, 2026 at 7:19 AM.

  1. micltho1

    micltho1 New Member

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    Location:
    Memphis
    Vehicle:
    2016 Prius v wagon
    Model:
    Five
    Wifes 2016 Prius V 5 <60k miles (New to us) The smart key system stops working randomly.

    Obviously not a good situation for mom. The system will lock / unlock / start the car a bunch of times then it will do the key not found and the fob has to be put against the start button to work. Have any of you ran into this?

    1. I've changed the 12 volt with a known good one. Also confirmed the suspect battery is good.
    2. Replaced the key fob batteries twice with new ones, and replaced with a known good battery.
    3. Neew fob programmed, and getting the same result so not the fob?

     
    #1 micltho1, Mar 25, 2026 at 7:19 AM
  2. Air_Boss

    Air_Boss Senior Member

    Joined:
    Jun 2, 2012
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    Location:
    New Yawk
    Vehicle:
    2012 Prius v wagon
    Model:
    Five
    Based on what is described and actions already taken, sounds intermittent SKS sensor communications (antenna or wiring to SKS processor behind glove compartment or to ECU) or radio frequency interference. Any codes set?

    Here is the Toyota pre delivery service task card: https://static.nhtsa.gov/odi/tsbs/2016/MC-10140584-9999.pdf
     
    #2 Air_Boss, Mar 26, 2026 at 8:48 AM
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