Prius (2004-09) :: Can No Longer Engage EV Mode - Battery Going Bad
Nov 17, 2013
Hard to put it all in a title. I have 149K miles on our 2009. The warranty expires in 1000 miles. I've noticed recently that I can no longer engage the ev mode with the ev mod. I always get a "cannot change into eve mode" message on the MFD. It used to be that I could do it before the engine started or after all warm up cycles were complete.
Now, when first powering on, ev mode won't engage before engine start and there is no MFD message. After warm up is complete, the message appears on the MFD whenever I try to change to EV mode.
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Just recently I"ve noticed my Pri-v is taking longer, and not as often switching to EV. All these observations are after the car has been fully warmed up and driven for several miles with a sufficient battery charge. Previously it would always switch to EV at 43mph when letting off the accelerator.......and I could keep it going usually till about 45.... A quick let of the accelerator would almost always accomplish this. Recently it has not been consistent...a few times not even shutting off when the car is stopped. The car has about 88,000 on the odometer. I've always noticed when it does go from ICE to EV, the transition is not a smooth too. That I"m guessing is the transmission fluid?
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I have noticed that my 2008 Prius does not always engage EV mode (after I push the EV button) when the battery is green (nearly fully charged) and speed is well below 45 km/hr. Message displayed is "switching to EV mode is invalid now". So it seems there are factors at play other than the speed and the level of traction battery charge.
What these are? Is battery temperature monitored? Will the operation of the air conditioner affect it? Most times it doesn't but I wonder if under certain circumstances it might.
I use it at times if I am going up a slow speed incline, often from a standing start, knowing that there will be plenty of opportunity to recharge shortly after.
Weather here is pretty warm- around 30C maximum during the day.
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I've had my 2009 Prius II for about a year now and I have NEVER been able to turn on the accessory mode. I followed the manual and put the smart key in the slot and pushed the power button while keeping my foot off of the brake pedal but I get NO RESPONSE. I tried holding the power button down, pushing it just once, and pushing it repeatedly. I've successfully engaged accessory mode on a similar interface before (on a hybrid Highlander) with no problem.
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I have a problem I can't figure out. 06 Prius with 105k.
Current codes: P3000, P3020, C1259, C1310, C1378
Car will run and drive but is in limp mode
HV battery fan is at full blast, but charge does not fluctuate
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A couple of weeks ago my amp went out and it was replaced. I didn't use the USB port previously b/c my MP3 player is old and wouldn't connect. However after having the amp replaced it dawned on me I could use my phone (motorola cliq) to play music with the USB. It worked for a couple of days and then nothing. The tab on the mode options for the USB would no longer light up. I can still play music from my phones SD card via the aux and via bluetooth, but not the USB. Took the car back in and two days later they are telling me its my phone. Maybe, but considering it worked prior and nothing has changed on my phone I am at a loss.
Today, they called to tell me they were able to hook it up to a ipod and everything worked great! Mine DID work, so what changed? They suggested I use a stick/thumb drive. Went and bought one, loaded one album onto it and it won't work either. The USB tab won't even light up for me to choose it as an option. I do NOT want to go by a ipod when I have a perfectly great 16 g sd card in my phone that DID work! But I also want to use my touch screen to choose songs and go through my music files without having to use my phone while driving. The USB port is recognizing my phone as it charges it while plugged in. I have tried setting the phone to SD card on, and then off (charge only setting). Nothing causes that USB tab to light up and give me a choice to see whats going on.
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When battery is low (purple bars IN DISPLAY) EV mode is not allowed, obviously; but WHY is it not allowed when the battery is full or nearly full (green bars on display) ?
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I am pretty new to Toyota Prius. Today I went to test drive a jap import 2nd Gen 1.5 Prius with 50k miles. What I found weird with the car was that, on the startup the petrol engine also started and it was on for the duration I was driving. I then turned on the EV mode and the petrol engine turned off but looking at the battery capacity on the screen, the battery drained pretty quickly possibly (2-3 minutes) and the petrol engine kicked in. Is this normal for 2nd gen prius cars ?
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Have a 2014 Prius III. Was getting 50-60 mpg until i took it in for the 5k mile service. Immediately afterwards the mpg dropped to 43-50 mpg. It seems when the car is cold, it will start in EV mode for a few seconds and then the engine will kick in and it will not enter EV mode for the first few miles even with the battery 80% charged, driving under 20 mph, a/c off and keeping the Hybrid system indicator in what should be the EV range.
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Maintenance Mode is useful for running the engine continuously without it shutting off, such as when you do a coolant drain and fill and want to purge air out of the cooling system. This thread was created to clarify the procedure for engaging Maintenance Mode on the G3 Prius after attempting to do it according to the Prius service manual and finding that the manual does not clearly describe or include all the required steps.
Perform the follows steps in less than 60 seconds to engage Maintenance Mode for the G3 Prius.
Begin with the car and all accessories turned off.
Set the parking brake.
With the car in Park, and your foot off the brake pedal, turn the Power Switch "On" by pressing it twice.
With the car in Park, and your foot off the brake pedal, fully depress the accelerator twice.
Step on the brake pedal and use the shift lever to shift from Park to Neutral.
With the car in Neutral, and your foot off the brake pedal, fully depress the accelerator twice.
Step on the brake pedal and press the Park switch/button to shift from Neutral to Park.
With the car in Park, and your foot off the brake pedal, fully depress the accelerator twice.
Check that "Maintenance Mode" is displayed in the multi-information display.
Step on the brake pedal and then press the Power Switch to start the engine.
Important: DO NOT drive the car in maintenance mode to avoid damage to the transaxle.
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Second dead battery in 2 years. ??? Car never sits for longer than 12 hours and no internal lights on. I have a III with Sunroof.
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I believe my GX470, 03 model, use to unlock the drivers door automatically when I removed the key from the ignition. Now that the battery has been replaced the doors no longer unlock when removing the key. Is there a way to reprogram this?
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We use the EV mode when going home for last quarter mile because its mostly downhill so for fun have the electric motor tow us home. What is "quirky" about this mode is sometimes EV won't engage even if big battery is full, gas engine is warmed up.
We know that going faster than 25mph cancels the EV and that short trips prevent EV from engaging. Other times EV just cancel citing excessive speed when we are going 10-15mph. So this is no problem but wondered what the parameters are for EV engaging and dis-engaging.
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How long should 12V battery last in accessory mode?
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Every once and awhile when I take off in the c the car drains the battery like it gets stuck in ev mode. The ev light will be off and the ice will be running but from a dead stop take off, the instant Mpg will read between 50 and 75 Mpg till it drains the battery gauge .
After the drain it works normal charges the drained battery and might not happen again for a couple of hours or a month there is no time period it happens.
Does this sound like a normal hybrid behavior? That's what I thought at first but because of the inconsistency of the behavior.
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After 2 days of not using my Prius V, the 12v battery was dead. I couldn't figure out what I accidentally left on. I jumped it following the instructions in the manual but right after, it went into EV mode and then it required to be jumped again. I finally got the engine revving enough that it stayed on. I had never really listened to the engine rev before, but while revving it sounded higher pitched and tinny as compared to my old 6 cylinder, German car.
Is this higher pitched, tinny, electric sounding revving sound normal?
Is there anything to worry about after jumping the car?
Is there a way to see the charge on the battery? (In my old car if you hit specific buttons when starting you could enter a diagnostic mode where you could see many readings, live the current battery voltage. It would also be great if the tire pressure reading could be accessed this way.)
Also is it possible to use the hybrid battery to jump the car?
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Alright so I've had this car for about six months now and the clutch was supposedly replaced by the dealer I got it at. The clutch usually grabs about half way up but sometimes it's higher. I replaced the master cylinder because it blew out, when changing my I take I noticed the slave was starting to leak so I replaced that about three weeks ago. Ever since then, the clutch seems to grab differently and seems to be taking longer to engage.
Now, I did the "slave mod" on the old one AND the new one so it's not that. Do you guys think the new slave is bad? I have high temp dot 3 in there (I try to only use the best fluids for my cars). It just doesn't seem to grab as hard as she used to. Like it takes a bit longer to engage. The clutch (should) only have 15k miles on it. The clutch parts are under warranty but I'd still have to pay for labor since it's a wear part. I'd like to avoid replacing it if it's that new u less it's definitely going.
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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 been driving a bit different to try and get some more mpg. I will pulse up to about 45 then let off till ev kicks in and keep the bar right at the verge of going into ice. I can usually cruise at 40 mpg doing this on flat roads while only using the battery. Although if I'm able to do this ev mode for a long distance my battery runs down then the ice kicks in even with the bar below the ice line.
I'm still only getting 50-51 indicated mpg this way but much better than the 42mpg I got just driving it... My route has some hill and my tires are no lrr so I'm think that's has some to do with my low mpg.
Question is does driving 40 mph in ev mode till battery runs dead then recharge with ice just to run battery down again coasting with ev do any harm to the battery?
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Wondering if there is another factor involved here...such as the wrong gauge. I'm routinely seeing battery temps in the mid to low 90s even when it is pretty warm weather and I am in EV. Is this possible? On my old Gen3 even when I use the battery just a little bit on warm days it would go over 110. Does the lithium chemistry just keep it that much cooler? Or does the cooling system keep it that much cooler? Or both? What are other people seeing for battery temps?
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I feel that I press the gas pedal less when the battery is at high level to get to same speed than when the battery is at low level. Is it true? I am operating in Eco mode, but I am staying in ev region with ev indicator on during the comparison. High means 7 bars, low means 3 bars.
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