Prius (2010-12) :: Engine Sound Is Very High While Driving Even After Enough Warming Up
Dec 20, 2012
I have purchased a 2010 III Prius with 73K miles last week after my 2006, everything is fine for me but I have a scary problem , the engine sound is very high while driving even after enough warming up, specially when the ECO meter reaches the PWR area or when accelerating hardly, I tried changing the engine oil with synthetic 0W-20 and the filter and the sound still the same.
Check the video attached and also note that
- Its winter here and temp is 50F.
- The car was imported from the US,
- The speed in the video in KM/h.
- I am using clean OCTANE 95 fuel.
- The video was after driving 20 Miles.
- I have latest version of Techstream with original Mongoose MFC...
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Basically, when driving shortly after turning on the car (when the engine is still warming up) I often experience a 'shot' of acceleration despite not further depressing the accelerator. In other words, I'll be driving along smoothly and suddenly the car will speed up slightly by itself without me having done anything. This only occurs when the HSI is past the middle (i.e. when the engine is powering the car) and when the car has recently been switched on. It's almost as if the sensor that detects my acceleration is re-calibrating itself while I'm driving, increasing the input to the engine.
The first time it happened it was a bit of a shock and I was a little scared, however I'm used to it by now and can anticipate it happening (however it doesn't happen 100% of the time). It's nothing too serious - it probably only accelerates a couple of KMs above what I'm actually doing but still is a bit of a worry. I'll be taking it in for a service shortly and seeing what they say about.
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Noticed the barely audible (with good ears) high-pitched sound that emanates from the car when you let off the throttle enough to prevent any charge or discharge bar from showing? It goes away if you completely release the throttle or if you press the throttle a tad bit more.
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16 K miles- the noise level when highway driving is beyond belief-- difficult to hear the radio and conversation is a strain. Tires are beginning to cup. Close a front door with a window open produces cheap noise, not a solid thump. Toyota agrees there is noise, but will do nothing about it. " that is the way they are".
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2013 Elantra (40k miles) just started having intermittent high engine rev while driving at low speeds (30-40 MPH). The rev last 1-3 seconds no engine codes showing up. The transmission does not feel like it is slipping.....
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When I'm leaving the house and I pull out onto the street, I have to go close up a very annoying gate which takes a good few minutes to do. The car is still in it's warm up mode so the ICE is running the whole time. I know just turning it off would save gas, but would it be bad for the engine, to turn it off with the key before it shuts itself off?
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I bought a 2010 prius 3 weeks ago and a squeaking sound came out after driving it for a week. The sound is like a wooden bed not screwed tight being shaken. My prius has 40000 miles on it and the warranty has expired already. I brought it to a toyota dealership and they could not find where the noise is coming from. I decided to bring it back to the dealership I bought it from and they also could not determine where its coming from. They said they need more time to find it. The squeaks often comes out in wavy roads and bumps and in both low and high speeds.
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I was driving today and had just gotten off the highway. I was going at no more than 10MPH when I heard some high pitched sound. At first I couldn't figure out what it was and thought maybe it was some outside noise. It quickly got louder over the span of the next few seconds and then I realized it was the engine. I had the pedal barely down so was definitely in electric mode.
I quickly glanced at my Scan Gauge and actually saw the RPMs go from 1200's up to 3400 in no more than 10 seconds. I have never had the car rev this high, probably just 2400s when I'm on the highway going 70's. By this time I was getting very perplexed and worried, and had my foot completely off the gas pedal. I immediately pulled to the side of the road and parked (hit the P button). The car seemed to go into park mode fine and then over the next few seconds the RPMs went back down to 992, and I made it back to the house no problem.
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A few nights ago while driving my 2010 Prius III on the highway I suddenly heard a whistling sound, as if my window was cracked open. It was not, and I guessed that there was some other piece of the car that had come loose (similar to a previous incident with my splash guard under the bumper and I just popped it back into place and re-secured the pin).
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My Prius IV with about 10K miles started to emit a high-pitched electrical humming sound under the hood when it was in Ready mode. It did not have this sound before. I opened the hood and found the sound was coming from somewhere around/under the engine area. I want to know if this is normal on Gen 3 Prius? I have seen post on the same noise in Gen 2 Prius but the posts (thread) stopped without a resolution.
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My '13 Prius Four has started to make a really annoying buzzing sound from the rear while driving. It can be heard inside the car but seems to be louder for passengers in the rear.
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How the synergy drive is working. Why when coming down on a long down hill (mountain pass for example) the car stays at high RPM ? That usually happens when battery is charge to its MAX of 80%.
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2010 Prius making knocking sounds. Not exactly the "death rattle" that sometimes happens when you first start the car.
* While driving, the sound reminds me of the Raptors in Jurassic World.
See example videos:
Knocking at idle (Knocking Noise starts at ~19 seconds into the video):
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Knocking while driving: (Good examples at ~24 seconds into the video):
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Knocking while driving with Torque OBD2 Monitors: (Noticeable example starts at ~28 seconds into the video):
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The car has over 300K miles and the problem started a few months back. At first the sound only occurred while driving under certain load conditions.
The problem would occur at intermittent times. Normally at low speeds with heavy loads (going up hill with low to medium acceleration). Also occurring for a short time when letting off the accelerator. Never occurring at moderate to heavy acceleration. Never at idle. Recently the shaking / raptor noise started to occur while idling.
* This problem is now easily created at idle each and every time the HV battery drops below 2 bars and requires charging. The engine change is immediate and starts and stops in sync with the extra load of the HV battery charge cycle.
Placing the car in the maintenance mode, the car will start and idle normally then immediately start and stop the knocking when it switches from HV charging to non-charging mode. There are no Check Engine light. Things I've done to troubleshoot the problem:
* Swapped the following parts with another working 2010 Prius.
** Coils and spark plugs
** VVT solenoid
** Cam Sensor
** EGR Valve Control
** Fuel Injectors
** MAF Sensor
** MAP Sensor
** Evap Control Valve
* Cleaned the intake manifold (It was full of carbon)
(This was done about a month before this problem started to intermittently appear). Prior to cleaning the intake manifold the car was shaking and misfiring under certain high torque condition and generating a P0304 check engine code). Once I cleaned the intake manifold the problem was fixed. I had no more check engine incidences and the shake was gone.
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I just drive my 2011 new Prius class 5 off the lot, and I notice the front driver side or front tire make a lot of noise. Also I turn a low speed I can hear that noise. It sound like a shock noise sometimes and it sound like tire driving on bad surface noise. Pretty much I can hear it all the time the noise is very annoying because my wheel, tire, car is brand new with 49 miles.
I'm asking Prius owner with 17 alloy wheel, do you have the same problem? Or the 15 inch wheel? I test drive the 15 and it was sort of bad but the 17 alloy make a lot of noise. I being to dealer they say it normal because of the big wheel and small tire. The bs to me, on the phone they say they will give me a same car to compare but when I got there there no Model for me to drive.
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Every morning 1.8T idles high when warming up usually takes a minute or two to idle down. When your running late kind of annoying when I drive before idle goes down to normal brakes seem way to responsive and jerky...
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Had a first-time issue with my car today. Background, 2010 II bought in June, just short of 15K miles, never had any kind of mechanical issue.
While en route to work this morning, I was about halfway into my 15 minute drive to work, when I noticed my engine was idling very high, I would guess 2500 rpms. It started doing it while I was driving around 35 MPH, then continued doing it while I stopped at a traffic light, and continued when I continued driving to a speed around 50 MPH. The high idle while stopped was not transferred to the wheels, so it was not a safety issue as it would be in other cars.
When I got back up to 50, curious to try something, I hit the ECO mode button and the car returned to normal. I took ECO back off and the car was still fine. I had no further problems.
I would point out that this morning was about the coldest temp that the car has experienced. Outside temp ranged from 7 to 10 degrees.
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I have noticed thru the cold months after I start my 2001 F250 7.3L 4X4 after it sits about a minute "warming up" that it goes into a high idle. The high idle will stop once I press the brakes. Is this normal?
I think this is a unrelated issue, but just started over the weekend. Was riding home, and pressed my brakes and the pedal moved almost to the floor. Not normal conditions for my truck. Usually the pedal is very stiff. I have noticed that my power steering pump has had a hum for months. I changed the fluid (ATF Mercon) within the last 6k miles and that calmed it down a bit.
After the pedal went to the floor, the hum seemed to quieten down even more. The power steering still works and the reservoir has adequate fluid and so does the brake fluid reservoir. I haven't noticed any leaks around the truck. I'm going to bleed the brake in an hour or so. The brakes pedal seems stiff when I press it after the high idle, but then it gets soft after a pump or two.
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My Prius just reached 200000 km this week. I bought it at 180000 km 2 years ago, I don't drive it that much simply because I work from home.
Today, a sunny day, 0 degrees, the check engine just lit-up. I opened the hood and checked fluid levels, all OK. I started it and listened to the engine, running as usual. However, when the motor stopped (hybrid ON), I can hear a high frequency noise. I don't remember hearing this noise, but I don't think I ever opened the hood with the engine Off but powered On.
How can I get the check engine code ? I assume I need a connector, right ?
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Bought a 2011 Santa Fe in May. When I'm warming up the car, there is a banging or knocking sound coming from the passenger side wheel area (I think). The colder the outside temp, the louder the sound.
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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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I have a 2010 model and have had this issue for the past year. When I open the drivers door I get an immediate buzzzzz sound from the engine that can last 10 to 30 seconds or so. What is this???
I believe it is somehow associated with ignition issues This last winter (in Texas) I have had to push the start button sometimes several times before the engine would startup. I brought it into the dealer and left it overnight. Of course there were no problems when they started it the next day. Anyway, I have noticed a worsening of startup problems (none in the summer) along with an increase in this buzzzzz sound. Is it just my imagination?
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