HeadsUpDisplay that shows ICE on /off for G2 Prius ?

Discussion in 'Gen 2 Prius Accessories & Modifications' started by cDxA, Oct 14, 2025 at 3:59 PM.

  1. cDxA

    cDxA New Member

    Joined:
    May 16, 2025
    25
    6
    0
    Location:
    Texas
    Vehicle:
    Other Non-Hybrid
    Model:
    N/A
    Is there an aftermarket HUD that is able to show when the car goes from ICE to EV ?
    If not, how hard would it be to hook up a dash mounted LED that comes on when the ICE is on ?
    I can't always hear or feel when the ICE is on, and this would be a non distracting way to know.

    I'm posting a lot recently, so instead of creating another thread, I'd also like to ask what you guys prefer for a MPG gauge, and why.
    The ScanGauge, or something else ?
     
    #1 cDxA, Oct 14, 2025 at 3:59 PM
  2. dolj

    dolj Senior Member

    Joined:
    May 14, 2012
    8,361
    4,261
    0
    Location:
    Wellington, New Zealand
    Vehicle:
    2007 Prius
    Model:
    N/A
    Both of those functions are natively on the MFD's Energy Monitor screen.
     
    #2 dolj, Oct 15, 2025 at 12:34 AM
    cDxA and BiomedO1 like this.
  3. BiomedO1

    BiomedO1 Senior Member

    Joined:
    Mar 27, 2021
    3,231
    1,713
    0
    Location:
    SacTown, Ca
    Vehicle:
    2021 Prius Prime
    Model:
    LE
    Yep; simply change your default display options.:rolleyes:
    You can still buy that stuff, if that money is burning a hole in your pockets. A better excuse would be to give the car the ability to do hands-free phone.:):eek:o_O:whistle:
     
    #3 BiomedO1, Oct 15, 2025 at 12:41 PM
    cDxA likes this.
  4. xw20_driver

    xw20_driver Junior Member

    Joined:
    Feb 4, 2025
    72
    35
    0
    Location:
    PNW
    Vehicle:
    2007 Prius
    Model:
    Touring
    Someone a while back posted about this. I picked up a P10 Pro OBD2 HUD. It connects to the OBD2 port under the dash and has multiple display options and data. I have it set to speed (mph/kmh), rpm, coolant temp, and oil temp. When ICE kicks on it displays the rpm and when in EV mode, rpm reads 0.
    PXL_20250831_001328468~2.jpg
     
    #4 xw20_driver, Oct 15, 2025 at 2:42 PM
    cDxA, bisco and VelvetFoot like this.
  5. Mendel Leisk

    Mendel Leisk MMX GEN III

    Joined:
    Oct 17, 2010
    59,711
    41,058
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Maybe a gen 2 thing? Our gen 3 I find it unmistakable, both due to sound and feel.
     
    #5 Mendel Leisk, Oct 15, 2025 at 2:53 PM
    BiomedO1 likes this.
  6. BiomedO1

    BiomedO1 Senior Member

    Joined:
    Mar 27, 2021
    3,231
    1,713
    0
    Location:
    SacTown, Ca
    Vehicle:
    2021 Prius Prime
    Model:
    LE
    Is there an engine oil temp sensor on a gen2? I know there's an oil pressure sensor. You sure that other temperature sensor isn't for the EV coolant system? That should be running cooler than the engine coolant sensor.

    Just asking; not that familiar with a gen2.
     
    #6 BiomedO1, Oct 15, 2025 at 8:29 PM
  7. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    113,434
    51,623
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    i could easily feel/hear it in gen 2 and 3
     
    #7 bisco, Oct 15, 2025 at 8:30 PM
  8. cDxA

    cDxA New Member

    Joined:
    May 16, 2025
    25
    6
    0
    Location:
    Texas
    Vehicle:
    Other Non-Hybrid
    Model:
    N/A
    I'm deaf in one ear and partially so in the other.
    As I get to know the car better, I may be able to feel the difference.
    Regarding the MFD, I can't see it easily, since it is located in the middle of the car instead of in the driver's line of sight.
    The plastic screen is also heavily fogged over.
    Even if it was in the line of sight, it would still be distracting, so I was thinking of adding in a dim ( blue ) LED light that is in my peripheral vision.
    It was suggested that I could easily do this simply by connecting the LED to one of the fuel injector wires.
    As the ICE comes on, the light would go on.
     
    #8 cDxA, Oct 15, 2025 at 9:04 PM
    Mendel Leisk likes this.
  9. xw20_driver

    xw20_driver Junior Member

    Joined:
    Feb 4, 2025
    72
    35
    0
    Location:
    PNW
    Vehicle:
    2007 Prius
    Model:
    Touring
    No clue. The instructions call it oil temp but I have no idea what data it is reading from OBD2.
    Screenshot_20251015-185945.png
     
    #9 xw20_driver, Oct 15, 2025 at 10:00 PM
  10. ChapmanF

    ChapmanF Senior Member

    Joined:
    Mar 30, 2008
    27,200
    17,840
    0
    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    Possibly the temp of the transmission oil. It would be easier to be sure if the app showed the ECU address from which that PID is retrieved.
     
    #10 ChapmanF, Oct 15, 2025 at 10:03 PM
(You must log in or sign up to post here.)