Can’t reset maintenance required light after replacing head unit?

Discussion in 'Gen 3 Prius Audio and Electronics' started by fgaston, Aug 22, 2025 at 4:30 PM.

  1. fgaston

    fgaston Junior Member

    Joined:
    Nov 13, 2023
    4
    0
    0
    Location:
    Old Lyme, CT
    Vehicle:
    2023 Prius Prime
    Model:
    XLE
    Replaced the head unit of my 2014 prius with an aftermarket stereo. That causes me to lose the ability to reset maintenance required light after an oil change.

    I tried looking up and resetting codes with an obd2 scanner but no luck. Any suggestions?
     
    #1 fgaston, Aug 22, 2025 at 4:30 PM
  2. AzusaPrius

    AzusaPrius Senior Member

    Joined:
    May 27, 2020
    2,150
    909
    0
    Location:
    California
    Vehicle:
    2010 Prius
    Model:
    IV
    Buy the harness that allows you to use the steering wheel controls.
     
    #2 AzusaPrius, Aug 22, 2025 at 11:48 PM
  3. ASRDogman

    ASRDogman Senior Member

    Joined:
    May 29, 2018
    7,331
    3,833
    0
    Location:
    Florida
    Vehicle:
    2010 Prius
    Model:
    Two
    I believe you put the trip display on "A". With the car off, press and hold the mph/kph button,
    then start the car. That's how I reset mine.

     
    #3 ASRDogman, Aug 23, 2025 at 7:38 AM
  4. Mendel Leisk

    Mendel Leisk MMX GEN III

    Joined:
    Oct 17, 2010
    59,276
    40,786
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    When the maintenance required alert is displayed does it block display of other info? Just curious, in Canada we don’t have this “feature”.
     
    #4 Mendel Leisk, Aug 23, 2025 at 8:23 AM
  5. AzusaPrius

    AzusaPrius Senior Member

    Joined:
    May 27, 2020
    2,150
    909
    0
    Location:
    California
    Vehicle:
    2010 Prius
    Model:
    IV
    Pretty sure the OP has reset the oil message before, just now he lost controls because he installed an aftermarket radio without a steering wheel control harness.

    Also yes it blocks all other info when you can not reset it.
     
    #5 AzusaPrius, Aug 23, 2025 at 11:37 AM
(You must log in or sign up to post here.)