Prius (2010-12) Fuel :: Can't Get Into EV Mode - Excessive Speed Message At 8 MPH
Aug 3, 2013
Just bought a 2010 Prius IV and loving the car.
Minor annoyance, but wondering why it's so difficult to get the car to enter or stay in EV mode.
When I'm able to get into EV mode, it often beeps that it's leaving EV mode due to excessive speed, but I'm often doing barely 10 mph when this happens. I was under the impression that I could do up to 25 mph. Yesterday, I was floating at 8 mph and it said that was excessive speed.
More often, though, I can't even get into EV mode. It says "EV mode currently unavailable" and why. Doesn't matter if I'm not moving or if I'm driving slowly.
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I was under the impression that when you enable EV mode the car will stay in EV till around 40 mph or something close to it? I can't seem to go above 10 mph without getting a message stating "EV Mode disabled due to excessive speed"? Is this a glitch or can you really only go 10 mph? That seems pointless if that is the case.
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I have questions about ev mode for my Prius c. I just got the car in December and was using the ev mode frequently. It would work when I was going 25mph or lower as long as I wasn't rapidly accelerating or climbing a hill. Now it seems I barely get up to 10 mph before it clicks of saying "ev mode deactivated excessive speed". This happens when I break to come to a stop or when I slowly accelerate. I took it to where I bought it and the kid rudely told me to read my manual so I did and this isn't covered. I have lost 10 miles on my mpg and I have been doing the same commute since I got this car. Before I was getting 52.3 now I'm lucky if I get 40.
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I've been using the EV mode - the EV portion of the curve without pushing the EV button - to run around town and to maintain speed once I've accelerated to traffic speed. It really boosts the mpg numbers and I'm able to get 55-60mpg on my 47mi. Roundtrip mostly highway commutes (hills included). Without the running in EV it's probably 42-48mpg.
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I've backed out of my garage the last few mornings and attempted to use the EV mode and have had a message on the display that reads "EV mode is unavailable at this time" or something to that effect. BTW, the traction battery is at normal charge, about 62%. ????
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I have only been driving my Prius for a month. I have been paying close attention the to the Car energy usage screen. I have been noticing the car (while on cruise control) entering into stealth mode (Engine seemingly off and power getting drawn from battery only w/ about 3/4 bar on EV) on the highway @ 60mph going down a slight decline. I have been trying to mimic this on my own w/o the cruise control, but no matter what I try (P+G and other techniques) I cannot get the same results.
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What's top speed for EV mode? I was able to keep it in EV when driving through town, after a hill, and keep it around 41-42 for a little while before my speed dropped and I had to use a little more throttle.
I don't understand why you can't lock in EV and deplete more of your battery at times, such as a few miles before getting on the freeway. Seems a bit wasteful, since the highway portion would give you plenty of time to build up charge again.
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I've been driving an 2007 Prius unitl last week, when I upgraded to an 2010 model. I'm very happy with it so far.
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Well been playing with all the mode to see what they do and the one thing I have noticed is I get worst mileage under ECO Mode. Why it doing this.
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I've been hitting the EV switch to keep the car in EV mode for the first couple minutes. It kicks off at about 20 mph. It does let me get up to speed using EV mode so my hope is that will translate into higher fuel savings.
The default and Eco modes require starting up too slow while hitting EV lets me apply more power and faster acceleration. Wondering why Toyota didn't engineer that into the car though?
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In reading the manual, I note that it says to use the ECO mode when you're doing a lot of stop and start driving. Does that mean I should NOT use it on the interstate? My daily commute consists of 11 minutes start and stop to interstate, 11 minutes on interstate, and another 11 minutes of start and stop. My Prius is not quite a month old, so i am still learning.
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New to Prius. I have read everything I can find on getting better MPG and find different ideas about using EV. My car is a 2014. Most say DON'T use EV except to move the car or just before the ending of your trip.
My thoughts are the ICE is not very efficient at or below 25 mph. Why not use EV excelling from a stop? Or driving 20 mph anywhere? I notice my car goes electric below 45 mph using very light throttle on a level or slight down slope.
I haven't lifted my foot to force it there, just driving to go with traffic or maintaining speed. So some Toyota software engineer thought it best to use electric even if I'm doing 44 mph ???
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I searched but did not find a post about entering diagnostic mode of Prius 2010. Is that possible at all?
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It has been documented that the computer will let the ICE coolant cool to a lower temperature before mandating it to fire up again to maintain that lower limit.
Why isn't this done in other modes? Is this compromising anything when it comes to emission or engine protection? Since full power is available in ECO mode, one can force the ICE to drive with full output, even when it is a little cold.
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We have 2 trips coming up this summer (600 miles and 1400 miles), these will be my first long distance with the Prius.
Did anyone tested fuel economy using the cruise control in ECO vs NORMAL vs PWR ?
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Gen 3 .... Driving in Power Mode to obtain the best mileage? I find I am getting better mileage in Power Mode.
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This morning I was playing around with my 2010 Prius "B" mode - I realize today that when the Prius CVT is in "B" mode the Prius ICE won't turn off even when it is at a complete stop -- instead the ICE runs/idles at a 996 RPM / .20-.40 GPH while stopped in traffic. The coolant temperature (@190F ) doesn't matter, Battery State of Charge (54% soc) doesn't matter. To re-enable the stop-start idle technology - I had to switch the Prius CVT back to "D" mode. I end up burning a bit more fuel on this trip because it took me a while to realize that I was in "B" mode and that the stop start idle technology had disabled in the "B" mode ...
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Two weeks ago we were driving across rolling hills in southern Ohio. I started to wonder, "What would be the perfect road for the Gen 3 Prius?" Is there a road shape that would allow the benefits of pulse and glide without the speeding up and slowing down?
Let's assume no net elevation change on an interstate highway and a driving speed of 60 or 65 mph. To stay in the most fuel efficient engine ranges for the ICE, we'd want down-hill stretches where the power demand shown on the hsi would be in the bottom 1/4 of the total Echo range, and up-hill stretches where we could stay in the top 1/4 of the hsi Echo range (just below Power).
Would the optimal ascent and descent angles be the same, or would the angle of decline be shallower that the assent angle? Would mileage (mpg) be better on this ideal up and down road than mileage on a flat road at constant speed?
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Recently I have been doing a lot of highway driving with my 2007 Prius. There is noticeably an excessive amount of wind noise at highway speed due to the gap between the front and back door.
After applying a piece of weather stripping from the hardware store, about $5 the wind noise is greatly reduced.
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I have a 2007 base model and for the last two months I keep getting three beeps and on the mfd shows up "Cannot Change to EV Mode Now". I haven't done any mods to the car. It seems to happen during the first couple of miles after start up, but it also happens when I need a little extra power to pass a car on the highway or if I've been coasting for a few seconds and then hit the accelerator again. I live in Atlanta and the temps have been 60-80 degrees for the last few months, so it's not getting to hot / cold.
This might be a coincidence, but it seemed to have started doing this after my last emissions test. The gentleman who did the test acted like he had never seen a prius before and took him a good 10 minutes to hook up his equipment. As this is going on, he proceeds to touch all kind of buttons on the MFD and got to screens I have never seen before. It wasn't until a younger co-worker came over and showed him how to hook it up that he stopped messing with buttons. My question is, could he have done anything on the screen that would cause the issues I'm having.
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I have a concern about my 2010 Prius V(five). I've noticed some issues lately that may all tie in to one big problem.
1. My ev mode will not work at all. My battery will be fully charged and not in "B" mode. Turning car off and on will not work.
2. Engine will not turn off when coming to stops. Mind you when the battery is above 3 lines.
3. Throttle response feels like it's in PWR mode(super sensitive) but the engine is leggy. If I floor it for a sec the RPMS are super slow to come down.
4. The Eco line is quick to go in PWR portion and I'm not pushing it any harder than I was before all of this started. It seems like when I push the gas it skips the electric and automatically pulls from the engine.
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