Prius (2004-09) :: Continuous Whirling Or Humming Sound When Engine Starts - Possible Bad Transmission?
Mar 25, 2015
My wife's 2006 Prius is having some problems. The car has 187,000 miles on it. When the engine starts it makes a continuous whirling or humming sound. WHen I try to drive it has minimal power and can not be driven above 15-20 mph on my street. I bought an inexpensive Actron code reader and got the following codes. P0A92 P0300 P0303 P0304 P3191. Does it sound like a definite transmission problem and those other codes are caused by the transmission problem.
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My 2008 Prius had a front quarter panel replaced after my wife back in to a fire hydrant.The body work looks fine , no issue there, but now when the car is coasting with the gas engine off you can hear a humming sound that was not there before the repair.Also it does,nt seem to be recharging the hybrid battery at the same rate.My thought is maybe the body shop caused some damage to MG1 by spinning the front tires on a emision testing machine or rollers.Does special precautions would have to be used when testing wheel clearances after a quarter panel replacement on a hybrid? Would a body shop need to do this ?
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About three weeks prior to leaving for Helen, GA I began to notice a whirling sound from the engine bay. I could tell it was the radiator fan, but it wasn't very loud and just figured the engine was really warm. So I left it and it went away till a few days later it came back and then stayed pretty regular, again not much louder than usual but had a slightly different sound. Three days before we leave for SoWo it turns into a monster. It sounded 10x louder, so I immediately called the dealership to find out how much a radiator fan would be and if they had it in stock. The larger of the two fans is about $380 and the smaller is about $320 or so [yes, we have two radiator fans if you haven't checked]. This doesn't even include labor. So I asked if they have it in stock, and of course they wouldn't know until they look at the fan to see which brand it is. I decided to leave it for the trip, with anticipation of driving with a group of friends and having my AAA card in my wallet [which is now gone, forever ].
Thursday, early morning [@3am] I was packing up the car for our trip to SoWo, I turned it on while I finished loading the roof rack to get the car nice and cozy temperature wise inside. It started off the 'normal loud' I had been experiencing the last couple of days, then it grew into some ungodly sound akin to a turbo prop plane building up thrust for take-off. We trudged on, hoped for the best and secretly expected the worst. I kept an eye on the engine temps, but ran into no issues. The sound abated and persisted till I made a run on ToD Friday afternoon. The sound stopped, and the car performed like a champ all weekend, and drove all 1700 miles without incident or real concern.
I felt relieved. The problem fixed itself!
That is till today, the sound faintly came back this morning
Here is what I know so far about the issue.
The noise is coming from the larger of the two radiator fans. There is no CEL but there are codes in the computer which indicate low rpms [possible obstruction] of the fan. I did a visual check, but could not find any issues. I cleared to codes with the thought that maybe this was a fluke but after clearing the code, it came back later that day when I got home from work.
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I've noticed about the last 4 weeks my 2008 touring Prius (85k miles) seems be running louder than it always used to. There is a sort of humming noise that follows the speed of the car, whether the engine is running or not, in neutral or drive. No warning indicators on the dash. No change in mileage observed. Seems slower to accelerate too, though I'm not entirely sure. I'll probably bring it in to get checked.
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I am slowly coming up on my 3 year anniversary with my Santa Fe 2007 3.3 AWD transmission , and after 50,000 trouble free miles I've encountered a problem.
It started this summer when I was towing my trailer on about a 300 mile journey. It sounded like a high pitched humming or whirling from the dashboard, while decelerating. It would stop at around 15 MPH. You cannot hear it while cruising. After days of head scratching I determined that the noise is coming from the transmission. It comes from the output side, as it shifts through all the gears smoothly, however it makes the sound with the engine off while coasting with the transmission in neutral too.
I noticed the transmission fluid was slightly burnt. As I am student, the problem was solved by turning up the radio, and as the car shifts great no thought was given.
During Christmas break I drove the car out to the west coast and about 400 miles into the journey the whining really got loud and frankly freaked me out. The car now sounds like little aircraft jet engines whinding down when you decelerate. OK its not as loud but when you're 400 miles into a 1600 mile trip you tend to get panicky about such things.
The car made it back fine. It still shifts great except for the whiney turbine noises that disappear below 15mph. I've got transmission fluid so I will start today by doing a couple drain and fills, but I suspect that since I've been a bit too lackadaisical about the problem that will not be sufficient.
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When my AC turns on or changes speed - a humming sound occurs. It only lasts for about 1 - 2 seconds.
Is this normal
It sounds similar (higher pitched, but not as loud) to the humming you hear when you turn the vehicle off.
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2007 GX470 - Just noticed a distinct whining/humming sound similar to tire hum you would have with aggressive off-road tread tires. Seems to come alive around 20mph (or at least that's when I can hear it) and gets louder with the increase in speed. As I slow the sound goes away. Only does it while moving and not in neutral with engine rev.
We bought the car at 59k and it just hit 70k . Only oil changes, tire rotation have been done since we bought it. The tires were new when purchased so they have about 10k on them. No noise when we first got the car so I tend to think it's not related to the tread.
I was planning to do the front/read diff and transfer case drain/fill. Wondering if that may be the cause.
Something else - at low speed in tight turn (i.e. backing out of garage, pulling into parking spots) I do feel some roughness - almost like the differential is locked. Not sure if that is an indication. Was thinking it may be a wheel bearing but there is no clunking when turning.
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My first VW was a 2001 4-door Golf (Silver), traded to 2003 GTI (Silverstone), traded to 2006 Jetta Wagon (Blue). Then the wagon was traded for a SUV. Well last week, I have decided to pick up my 4th VW. It's a 2012 CSG 4-door GTI.
After driving the car for a week, and putting on 350 miles, I heard a high pitch continous "whistling" sound from the engine. Took the car to the dealer this afternoon. Tech came out and loosened the coolant reservoir. I heard a "pooof", sound of air build up. The tech said VW is aware of this problem. Something to do with the water pump bearing. It has to be replaced. They took the car in to replace the water pump.
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Ok, been trying to track down an odd humming noise on my 08 f150 CC 4x4, 4.6l. kind of sounds like a hub bearing going. starts around 25-30mph and never quites down.
Turning left or right to load each side of the suspension doesn't change tone or intensity of the noise, different pavements doesn't change Tone or intensity. Hubs are tight, CVs are tight, 4x4 works as it should. Cant figure this sound out and it's quite loud.
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I have a 2005 Prius with about 185,000 miles on it. I've noticed a water sloshing sound coming from the engine area whenever the ICE starts up and I'm accelerating from a stop. This sound does not occur when just running off the battery in electric mode... only right after the engine cranks up. After a few seconds the sound goes away until the next stop.
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I would describe the noise as a whirling/vibration sound that can be heard as soon as the gas engine portion of the car kicks in (even in park) but gets louder and more noticeable as the car is in motion, especially at highway speeds (55 - 65mph). Opening the hood and listening to the engine block, the noise is definitely coming from around the area of the silver-covered portion by the driver's-side, which I believe is the hybrid synergy engine. The noise has gotten to the point where I really get bothered by it driving anywhere, and I have to turn up the radio to try to drown out the noise.
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Recently (5-6) months my Gen II has been making some weird sound when I turn it on before the ICE starts. Also when I turn it off after the ICE shuts down. I really don't know how to describe the sound so I took some clips of it. Sort of a high pitched grind maybe? Car has 45xxx, just had the Hybrid water pumped replaced.
[URL] .....
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I have a 2009 Prius with about 56K miles on it that I absolutely love. Now I know from reading in the forums an my own experience that when the A/C compressor starts running you hear an electric whirring sound. My question is... is it a cause for concern when the sound it makes seems different -- the pitch sounds lower to me now. The A/C still works fine, but I didn't know if this changing sound means the compressor was on the way out.
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How is the turbo in this new design cooled? Sometimes when I restart a hot engine, there is a high pitched whirling sound before I take off. Is this the turbo in action? Are there active shutters in this car? Twin Power Turbo 2011 BMW 535i....
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I hear this humming sound when hit 70mph and I am on the gas. However it lasts till 73mph or so and go away!. Below is the pattern I observed;
1. On gas (accelerating), when hit 70mph (not even 69 mph) I start hearing humming sound. It will last till 73mph and goes away. Not able to pin point the source. I feel it is originating somewhere closer to transmission shift.
2. Decelerate from above 73mph and no gas given, when hit 70 I don't hear the sound. Press the gas pedal, I hear.
3. Set the cruise at 70, I hear.
4. The hmmmm sound appears only between 70-73 mph speed and while on gas.
What is this sound?. What is the source?
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I have a 2001 Chevy Malibu ,I have noticed a whirling sound coming from my steering wheel whenever I am turning. I am wondering what could be the cause and should I get it checked out.
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Finally got the Tech to acknowledge the Humming/Groaning from the Engine as I sat behind the wheel at my 5000 mile service visit. His response was that the sound we were hearing ( at start-up) was "NORMAL"
The RX drives and sounds fine after that mileage, but many times my destination is less, and I feel like I am driving a reject.This has persisted since new, @ frigid and high temps; as we approach 7500 miles.
Engine sound varies in pitch when acceleration increases the RPM's ?
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A little less than a month ago my wife's old 1999 Mustang had the tires replaced. Since that time there she has noticed two new sounds:The first is whirling/grinding sound coming from the front right wheel that comes and goes. The second is a low, loud groan that seems to come from the front of the vehicle when the brakes are applied. The groan varies in intensity but seems to always be present when the brakes are applied. The groan is not unfamiliar to anyone that's driven an older car, but it is much louder than I have ever seen on any other car (on the other hand I usually drive a Corolla so it may be normal on a V6 Mustang ).
The first sound seems to have been reduced but not eliminated since I followed the advice in this video below and pushed the plate behind the wheel back a bit with a screwdriver. Now it is only audible when the engine is off and the wheel is spun (in other words, when it is sitting on a jack and the wheel is spun by hand), but it is still there.
I took it into the shop where the tires were purchased and mounted. The good people at the shop did rotate and balance them, but both noises remain.
I looked at the calipers and discs and everything seems in order except (possibly) two things. The discs have rust around the edges not unlike the ones in this photo below and I have no clue if that is normal or a problem. The rust is present on all wheels and only the one makes that noise, so I think that may not be the source of the sound,. On the calipers some substance (paint?) is peeling off, but otherwise they look fine and again the same is true on all the wheels so it seems that is unrelated to the noise. I have not been able to get a look at the pad, so I don't know what condition they are in.
Other information: The serpentine belt was replaced a few days after the new tires were installed. The radiator was flushed at the same as the belt was changed. They also threw in an oil change and all the fluids checked at the same time. The tires are new Michelin Defender size 205 /65 R15 and all 4 tires are new. The engine is a V6 and the transmission is automatic.
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My wifes 2006 mountaineer V8 overheats. She says itll only do it sometimes after the truck has been warmed up. She will come top a stop and the temp will spike and she will get a warning light then it will go back to normal and be fine. When the temp spikes she hears a loud whooshing or whirling sound coming from the motor which I supposed is the fan? Could it be a bad thermostat or waterpump?
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I began hearing a whining/humming sound just a couple of days ago esp when hitting 45mph and then would notice as I took my foot off of gas. I had hoped it was either tire or bearing related, but Toyota tried for over an hour and finally determined it was transmission related..a new transaxle assy etc would cost a total of 6500$. However, they said they did not think I had to do anything right now as everything is well lubricated..they even thought it could remain the way it is for a year to two. My Prius has 180,000miles on it. Should I attempt to find a salvage transaxle and risk having it put in? Or should I cut my losses and given up?
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It's starting to get a little chilly, and I'm hearing a strange noise. When the car is cold and the heater fan is on 3 or 4 "marks", I can hear a hum coming from behind the dash on the drivers side. The hum will have a haearbeat type sound to it every second or so. It's definitely some type of motor sound. It seems to go away (or maybe I can't hear it) when the car heats up.
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