1. Attachments are working again! Check out this thread for more details and to report any other bugs.

Limiting engine startup in cold weather

Discussion in 'Prime Main Forum (2017-2022)' started by sylvaing, Oct 30, 2023.

  1. sylvaing

    sylvaing Senior Member

    Joined:
    Jul 15, 2023
    1,185
    495
    0
    Location:
    Canada
    Vehicle:
    2017 Prius Prime
    Model:
    Plug-in Base
    That's one reason I like to drive the Prime in the city but when going on a trip, Autopilot is such a dream to use.
     
  2. Karkus

    Karkus Junior Member

    Joined:
    May 9, 2005
    38
    1
    0
    Location:
    Boulder, CO
    Vehicle:
    2019 Prius Prime
    Model:
    Prime Advanced
    To get some defrosting without automatically kicking on the engine, I find it usually works to manually set the climate screen to Foot+Defrost (with fan off), and then turn on the fan to the lowest setting (or second lowest usually works too, but I don't usually go beyond that). This works even below freezing, when it's in the 20s F. Typically my heat setting will be in the 70s when I do that, and we live in Colorado, with low humidity.
     
  3. Northerner

    Northerner Active Member

    Joined:
    Feb 26, 2020
    121
    103
    0
    Location:
    Midwest
    Vehicle:
    2020 Prius Prime
    Model:
    Limited
    I live in MN and almost never use defrost. I just set the automatic temperature control on at 64F when it’s too cold to use the seat and steering wheel heater alone. If I’m generating too much humidity for this to work (eg… sweating from a workout or shower) I might also crack open a window to exchange some of the air.
    However, I typically park in an attached garage and that surely makes a difference.
     
    vvillovv likes this.
  4. sylvaing

    sylvaing Senior Member

    Joined:
    Jul 15, 2023
    1,185
    495
    0
    Location:
    Canada
    Vehicle:
    2017 Prius Prime
    Model:
    Plug-in Base
    I try not to use Defrost either. Thinking about it after going through winter (almost over), I think it's going on highways that started the engine. Maybe I've pushed the car enough that the engine needed running. I've been running in EV down to -10°C without any issues since then.
     
  5. vvillovv

    vvillovv Senior Member

    Joined:
    Mar 19, 2013
    3,907
    1,338
    1
    Location:
    NY
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Plus
    The first winter I did that as well and the engine never came on for me all winter. I have a long hooded parka and if I was breathing to much moisture onto the windshield I'd open the window(s) and breath into the parka as much as I could. I never used the seat heater either. If my hair was wet I'd have to tuck it in under the hoody and open all the windows. I didn't do that too often, brrrrr. I never went more than 45 mph and stayed closer to 30 or 25 if possible and always early in the wee hours of the morning to avoid as much traffic as possible. I hated when I'd see another car coming up behind me and look for a spot to pull over safely and let them pass. And if I couldn't find one in time I'd have to speed up which would throw off my calculations for the trip.
    I was able to keep my EV range in the low 30's remembering around 34 for most trips and it was always a tossup if I'd be able to make it home of would I have to stop and the closest charger 3 miles form home to be able to get home without running the engine.
    The other daily driver drives it like a regular car, during rush hour, so that made it easy for me to always beat the EV estimate by at least 10 miles, sometimes 15 in the summer if I could go slow enough.

    I got bored and frustrated padding the EV range 2 years ago, even though my back off the Go Pedal foot muscles are still pretty strong. I was amazed at how trained the Pedal foot gets to push down instead of pulling back off the damned thing.