Prius (2010-12) :: When Braking Engine Would Sound And MPG Indicates Fuel Consumption
Jul 28, 2016
Yesterday we were on a 10 hour trip and the engine was acting oddly; when braking, the engine sounded just like the engine brake, but the MPG indicated that it was consuming fuel (engine brake does not consume fuel). When braking, the engine would sound, and the MPG indicator indicates fuel consumption, it would go down to 50, with the heavier braking, like when stopping... then at a certain point it would suddenly stop
It seemed to happen most times but not always. This issue didn't happen before.
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When I go out to do errands around town (I live right in town) I get horrendous gas mileage. Now, I understand gas mileage is high at the beginning of a trip, but for this long and this high and under these circumstances? I'm getting ABOVE 10l/100km when I have 80% charge available (for americans, that's disgustingly high MPG like, pick-up truck high), AND my foot is completely off the gas. Literally, coasting, or braking, and I'm still sucking up gas. What the heck?
Is this just because it takes a certain amount of time for the engine to run no matter what or something? I still don't see any reason for me to be eating up all that gas when my foot isn't even on the gas AND most importantly, I have charge available. Feels pointless for me to use my car for what I use it for 70% of the time, which is for quick errands around town at low speeds. Thought the prius was suppose to be a superstar for this kind of thing.
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Just bought a 2012 Prius Three last Friday. The MFD (upper display) shows an average of about 53 mpg so far, and the corresponding 1 & 5 min bars seem to make sense (we have an 07 TCH so we're reasonably familiar).
But the Display Audio unit (6.1 inch) Car>Consumption graph seems to show 100mpg most of the time/most bars. That can't be right and it looks nothing like the MFD display. What am I missing?
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Just bought a used 2010 prius II about 2 weeks ago with 10000 miles on it. As I've been driving I feel the consumption display is misleading. It averages around 52-53 mpg, but I'm only getting about 480 miles before I'm running on empty. The tank capacity is 12 gallons right? If so I should be getting at least low-mid 500's before I need to fill up again. Hopefully I'm calculating something wrong and its not the car itself.
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So, my 2005 Gen II Prius went for a scheduled service on Wednesday, 70k miles, Toyota main dealer. They called and said it needed new front brake pads and disks, I was surprised but gave the go ahead. There would occasionally have been a mild squealing sound from the brakes at very low speed so I accepted the pads might need replacing, I was surprised the disks needed replacing but it hard to argue about brakes, especially as I only have the car a year (I'm the second owner and it has a full Toyota service history). It had a "major" service, new spark plugs, new front brake pads and disks.
Since collecting it I've noticed that the engine seems to kick in more often and needs higher revs. The fuel consumption seems higher, normally mid 50's MPG (imperial gallon) now 35MPG. However it hasn't been driven many miles since its been serviced so its a low distance for calculating MPG. I've also noticed that the car seems to slow more quickly without applying the brakes, a regularly driven hill that I coast down at 48kph now only gives 35kph. Also, if I drive on a flat road for a mile or 2 and coast to a stop the front brake disks feel VERY hot, way too hot to touch, drivers side more so that passenger side.
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In Menu -> Info Phone -> Fuel Consumption
How can I reset the fuel consumption?
I couldn't find it on Owner Manual...
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What is the hourly fuel consumption for a Toyota Prius at idle? Purpose is keep cabin warm for 8 hours. Would this damage engine?
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It's great on gas below 2200 rpm. Averaging 34 combined. However whenever I'm in a situation where I need to accelerate, such as beat the yellow light, up a hill, or pass someone and I shift to a lower gear I lose 1-2 MPG at the drop of a dime. And then it takes forever to recover. What is going on here? Is the engine being flooded with fuel?
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When slowing to a stop and turning to the right, there is a ticking sound (not loud) coming from the front. The ticking rate slows as the wheel slows and continues until almost stopped. Break pedal pressure does not affect the sound. The dealer tech heard the sound on a demo drive but they had no clue what it was and found nothing wrong.
The tech, sitting in the right seat thought the sound was coming from the left side. I hear it coming from the right side. Maybe that means it comes from the middle? I only hear it when coming to a stop. Maybe road noise covers it up at higher speed but I don't know.
Currently at about 38,000 miles.
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My '10 is just over 2 years old now and virtually trouble-free. But since new, I have a noticeable turbine/whining sound slowing to a stop esp while braking from 20mph to a stop. I wrote it off to the motor generator and brake regeneration - hybrid sounds. All fine and well. But I have ridden in two other '10s in the last year and they both seem to make less sounds while decelerating and braking than mine. Is it my imagination or is there something to it? I'd rather not blindly bring it to the Dealer as I'm sure it would get a "normal operation" finding.
1. Is there a TSB out on this by chance?
2. My 3/36 warranty will be up in 10 months. Is there a master TSB listing available on PChat or elsewhere (for free) to check on open G3 Prius TSBs?
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I changed the throttle body , PCV , clean the EGR tube and put new gasket in my Prius B 2010 hybrid.
The car was burn oil 1/2 liter per 1500km and since I changed the throttle body I noticed that the car burn 1/2 liter per 400 km .The job by the dealer.
Is there any problem in the installation?
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How do I turn the "fuel consumption comparison" off? I want to see only the quantity and price off the gasoline I have consumed.
There isn't a "disable" feature, so I am guessing I set it to 0 mpg?
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I have a 2002 Prius that started sounding weird about a week ago... sounded like a jet engine when accelerating and braking. Also, it felt like it wasn't going into gear right when accelerating from a stop in either R or D.
I took it to the Toyota dealer, and the Prius guy drove it, and told me it was the "transmission,' which would cost about 5K to fix. I should get a computer diagnosis. So I took the car in earlier this week, and the only code that showed up was P0, random system misfire.
Well, last night, I was driving and 3 warning lights came on all at once:
1) power system warning light
2) hybrid vehicle battery light
3) hybrid system warning light
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Since I got Prius I've noticed that driving at 50mph returns 80+mpg , 90+mpg if I let it gently glide at -1mph per 1 mile. As it gradually slows down, the mileage starts to decrease. By the time I get down to 45 mph the mileage shows around 70mpg,
I get down to 40mph, I'm only getting 50mpg. When I keep my speed between 40 and 45 I get about 52-55 mpg for the day. If I keep my speed between 45 and 50, I get 55-60mpg for the day.
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I bought a Prius 2nd Generation (2008) Japanese domestic). When I go to Consumption view it shows blank Graph for the past 5min - 30 min graph. How to fix this.
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I kept a record of every drop of fuel used in my 2008 Gen II Prius. It was easy with only two simple screens: Energy and Consumption. After writing down the numbers I reset the Consumption screen at every fill up. I entered these into a spreadsheet that did a bunch of calculations telling me all kinds of interesting things.
Now to my new 2014 Prius v Two. I'm confused regarding all the new information available. (A good thing) Which screen and number am I looking for that is equivalent to the Miles and cumulative MPG on the old Gen II?
Would like to sort this out before my first fill on the new car.
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how much fuel is consumed during a typical warm-up period for the Gen III? I realize there are variables related to ambient temperature etc..
my interest is to get a baseline consumption figure to compare warm-up saving devices/techniques against.
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Regarding my problem (outline below):
>> Went for a refueling stop, and thereafter proceeded onto the highway
>> Approx. 500m into the drive onto the highway the car started jerking and running rough with an initial puff of smoke (none thereafter)
>> Immediately after this initial jerking/shuddering there was a significant increase in fuel consumption i.e. from a familiar 8.2L/100km to 18L/100km in the cruise
>> We continued driving not knowing what it was (I suspected a spark plug may have stopped working)
>> Pulled up at the gas station to observe what went wrong inside the engine bay - no signs of any leaks, fuel sprays, etc. but only that the engine was shaking
>> I checked the rear of the car while the car was idling and observed a pulsating sound...some light smoke and a fuel-rich egg-like smell
>> Asked around and I was led to think the catalytic converter was ruined, so the next day I had the catalytic converter cut out
>> After removing the catalytic converter the problem persisted...although the engine operated with slightly less flow resistance
Attempt at diagnosing the problem
>> My wife called in a technician from BMW at Canal Walk to come have a look and what errors were flagged
>> The tech ran the diagnostic and no fault codes were indicated, except a few short circuit faults due to my incorrectly placing -ve on +ve when I tried to charge my cars battery with jumper cables
>> He proceeded to ask if we changed the spark plugs, I said yes. He then looked at the oil on the intake manifold and said there could be a torn valve on the intake manifold and that air that is not measured by the air mass flow sensor is entering the engine, which is causing the car to rev hunt (this problem of rev hunting has been with us for a while). The engine also shuts down uncommanded at stops and sometimes between shifting gears with the subsequent loss of power steering (very dangerous!!)
>> We also had the O2 sensor replaced a month before this occurence
The images attached (#1- #3) are marked up to indicate the component I am referring to.
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[IMG] FilesImage_2.jpg[/IMG]
[IMG] FilesImage_3.jpg[/IMG]
Went to Cape City VW in Cape Town and the part number for that orange thing/diaphragm is 06A 198 205A 'Repair kit for valve'. Is this significant? The car sounds as strange at idle...as if has noisy valves. I can upload (if there is an option) a sound clip of how the car sounds if this assists.
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I have a 2010 Prius that I've owned for a little over 2 years. I know basically nothing about auto mechanics. When i purchased the Prius, I was told by the salesperson to use engine braking "B" as often as possible to extend the life of my brakes.
Although I don't live in a mountaineous region, I have found engine braking to be useful in the snow, in the occassional steep hill i come across, and also in my daily commute where travel is at 55 MPH with a stop light every half mile or so.
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The 30 minute fuel consumption yellow bar graph doesn't display on my 2006 Prius. It shows my current mpg but not the previous 5 minutes sections. It also doesn't show the green battery regeneration icons. Everything else seems to be working fine.
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I am trying to figure out how to turn on this display for the odometer. Surely this wasn't designed to only show avg consumption for trips right?
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