No EV at startup?

Discussion in 'Prime Fuel Economy & EV Range' started by gene, Nov 6, 2021.

  1. gene

    gene Member

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    I'm still seeing this issue, but there are some patterns:
    • This started when temps were under 40F at night pretty consistently
      • No heat, no front defroster, etc. are on
    • It typically happens the first time I drive the car for the day (or couple of days)
      • Battery is typically fully charged at least a few hours (4-5) before, sometimes the day before
    • It falls out of EV within the first mile or driving
    • On the highway, twice, I would turn on cruise control... EV would go off. Turn off cruise... EV kicks right back on. I was able to reproduce this 3-4 times in a row.
    • Once the engine warms up (~4-5min), EV mode kicks back on
    • Subsequent driving it stays in EV mode
    We'll see what happens once the weather gets even colder during the day. I'm guessing maybe Toyota tweaked something for 2021+ so that the engine kicks on even more easily when the traction battery is "cold". Its definitely annoying, and I'll be even more annoyed if it does this even more often when the temps are colder, but we'll see.
     
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  2. vvillovv

    vvillovv Senior Member

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    Prepare to be more annoyed unless you can change driving patterns enough at those times when the engine turns on, to help the car keep the engine off. The car, more than likely can be coaxed to keep the engine off with a bit of babying, it just takes time and sometimes lots of frustrating time to learn why the engine is turning on when you think it should not have to. It nearly always gets more frustrating to keep the engine from starting unexpectedly as temps approach freezing and drop below.
     
  3. gene

    gene Member

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    Yeah, I expected it when it got really cold. I didn’t expect it at 40+F though. I’d also love it if the car communicated why it’s coming out of EV mode.

    I’m guessing that’s “Toyota proprietary algorithms” and not something I can determine from an ODB scanner or similar?

    Next vehicle will definitely be a full EV.
     
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  4. bisco

    bisco cookie crumbler

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  5. Bill Norton

    Bill Norton Senior Member

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    But you'll miss doing oil changes on engine oil that may have only 3500 miles on it, right?:whistle:
     
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  6. bisco

    bisco cookie crumbler

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    90 bucks every year, whether i like it or not
     
  7. Bill Norton

    Bill Norton Senior Member

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    Are you saying this is what you pay for a simple oil change?(n)
     
  8. bisco

    bisco cookie crumbler

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    yep, 4 qts of mobil one, a filter, enviro charges, shop supplies and labor.