Prius (2004-09) :: Unexplained Whirring / Whining Sound During Deceleration
Mar 20, 2016
My "05" Prius has 164K, I'm the original owner and I have had great success with this car. I know some owners talk about the loud whining humming sound from the A/C unit which I am aware of but this newest sound is different and after 4 hours with a Toyota tech all they can come up with is an A/C compressor going bad. I only hear this sound after I reach 40MPH+ and then decelerate. It then winds down with the speed of the car sometime intermittently. If I accelerate it goes quiet.
I've also tried speeding up to 40MPH and then move into neutral. It will stop the noise. I'm adding a video and I realize there is standard road noise but if you watch my energy monitor you will hear the noise whirring winding when the green arrows point back to the electric motor. Pay close attention to the viseo frames at 13 seconds, 22 seconds and again at 29 seconds. Turn up the volume. Of course inside the cab it is much more pronounced. I'm finding it hard to believe this is an A/C compressor. Sounds more like an electric motor whining/whirring. I'm concerned about driving my car for safety reasons.
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Bought a Jetta GLI 2004.5 in January. 94K miles. No noises accelerating or while coasting (clutch or neutral). However, when I decelerate in 3rd and 4th gear w/ no foot on gas, there is a very apparent whirring sound from the front-end (maybe in the engine bay). But I don't hear it while decelerating in any other gears. What is the cause? I will try and capture sound later when I get home. Just wanted to see if this was a common fault.
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Started getting a whirring / rubbing sound during deceleration and took it into dealer for diagnostics. They said driveshaft needs replacement. Fortunately they are covering under warranty but it's got me concerned about longevity.
I've got an APR Stage 1 ECU upgrade but otherwise stock. Not a track car and i'm not moonlighting at the drag strip dropping the clutch at 5000 RPMs to try and make into the 11's so am baffled by the issue.
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So, I'm minding my own business pulling out of Starbucks with my gingerbread latte, making a nice and easy right turn when I hear "clunk" ("pop" maybe??). I hear a scraping/whirring sound on deceleration only (once I get past say 30-40 miles per hour). NOT brake related at all, occurs only when I let up on the accelerator. My baby is a 2000 Ford Taurus with 238,000 (yep, you read that right). I'm thinking transmission (and, I really want to be wrong). I've had the transmission flushed every 30,000 miles and serviced at 150,000 per Ford's maintenance schedule. I have taken very good care of my vehicle, but I do put a lot of miles on it every day as I drive 120 miles round trip to work 5 days a week.
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Our V6 just turned 40k and it's developed some interesting sounds. First of all, from time to time at highway speed a whirring/whinning sound has developed. I was driving down the road the other night, no rain, about 60 degrees temp outside, and between 50 and 80 mph this noise seemed constant. I turned off the radio, turned off the climate control and the problem still existed.
It *sounds* like a drive train noise (my old jeep would make a sound when it was in a low gear that is similar). Second, also intermittent, a clicking relay from inside the dash on the drivers side. The frequency and rate are inconsistent and I can't correlate it to anything happening while driving.. just highway driving.
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Well, today i had my first bout with tranny issues of any kind either before or after my BTS installation. After sitting all day at work, heading home, the shift i guess from 2-3 at about 40-50 mph shifted really hard, BANG. Heard a whirring/whining sound, lots of slipping with the TC. After a lil ways it was like it was in neutral.
Coasted to stop. Went thru the gears from park, rev, and drive about 3 times, got movement each time. Got out, looked for obvious, no fluids or linkages apparent. Drove thru town about 25-30 mph. Felt like it was "hunting" and shifted like a manual grinding gears. Got on highway and no overdrive and im thinking no high gear either.
Push button on shifter light changes, but no change in operation. Running 60 and rpms are turning 2700ish. Still "hunting". But while hunting it isn't wide rpm swings, just a small amount, not wide enough for a gear shift. I am thinking that its torque converter constantly engaging and disengaging.
While letting out of gas it coasts down with TC still locked up all the way down to about 1100 rpm before unlocking. Then I start seeing the OD light flashing. Ok, classic wire chafe in steering column. But it doesn't always flash, only sometimes. And fuses are good. Temps never got above 150 during this 50 mile drive.
So i get home (and its frigging dark already, i hate that this time of year) and I log on and start reading up on this again to refresh my memory. I had called Brian over at BTS when it happened as i was going down the road, he was busy at time. He called me after i got home and i explained and he talked me thru some things. Wanted me to pull the codes and get back with him tomorrow. I did that and the screen shot is below. I will talk more with Brian tomorrow.
But during some of my reading i think i came across some others that had similar trans codes and the issue ended up being the alternator. Alternator ? For trans issues? Is that right? I guess stranger things have happened. I have a high output alt waiting to be installed but haven't yet. I guess we shall see. Brian thinks it something telling the TC and trans to act that way. Doesn't think anything mechanical, yet, leaning towards electrical.
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I have a concern about not hearing the whirring sound after shutdown anymore. I know that the sound comes from a small electric-pump that pumps 3 liters of coolant into a thermal container (to keep it hot) everytime I turn the hybrid system power OFF. When the power is turned back ON, the coolant is pumped back into the engine.
I've noticed that after I got an oil change and tire rotation at Pep Boys the sound is no longer there after shutdown or power up. Then after a couple of days I took the car to the dealer to fix the tire rotation (because Pep Boys didn't do a good job at rotating the tires, there was a woo woo woo sound while driving) and the dealer also did a multi-point check, but they didn't say anything was wrong with the car.
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It's been cold, but I've been driving. When I park and power down, I'm hearing a high-pitch sound...like a fàn...it lasts about 10 seconds.
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We are only one week in to owning our 2006 Prius! Question is why does it sound like a motor whirring sound after turning it off? It only lasts 20 to 30 seconds, just wondering if this is a normal sound?
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I have a "05" Prius problem that I'm stumped on. I have 165k miles. I am the original owner and have maintained this car really well and it really runs incredible. I just started to hear a strange new whirring/winding sound coming from the front when driving. When accelerating it goes quiet. When I let off on the gas it starts whirring. Between 40-45 MPH if I let off on the gas it will whir but then when I drop below 40MPH it does it intermittently. It almost sounds like it is attempting to slow the car down . I've looked over the forum and other sites and hear about other sounds like this (ex: A/C motor), but nothing that matches my symptoms. I can say this, it in no way affects the performance of the car, just very annoying. If it is serious I would like to jump on it right away and try for 200K .
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For about 3 years, our SF (about 125,000 miles) has experienced the whirring/whining upon acceleration whenever the AC was running. I didn't do anything about this as the AC still worked well.
Just a few days ago, while running the AC for a "recharge" during our recent cooler weather, I realized that the AC was not cooling below outside ambient temperature, nor was the whirring present any more. I assume that the compressor finally seized. (?)
To keep repair costs low, and based upon the description above, where should I begin to look to see where the problem lies? Is it most likely a seized compressor/clutch? I am unsure if this is the issue, since even when driving with the AC turned to "Max", I now notice NO detrimental effects upon the engine/power output, which makes me wonder if the compressor actually seized. Wouldn't a seized compressor actually be very hard for the belt to turn, or possibly burn the belt?
I know the compressors and AC systems on these cars are notorious for dying too soon...
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My 2008 Prius has started making a noticeable soft whirring sound whenever the engine is running. You can hear it both inside and outside of the car. The sound lasts exactly 30 seconds, then pauses for 4 seconds, than repeats . When the car is turned off, the sound can be heard for about another 10 minutes before it shuts off entirely.
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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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Prius owner. I have 200,000 miles on the car and have done nothing except change the oil, tired and battery. No other maintenance was performed.
While driving straight the front wheel seems to vibrate some and make a whirring/roaring sounds. When turning to the left the noise is greatly reduced. When turning to the right it still exists.
Any potential causes? Possibly the struts? They as well as all the front end components are original.
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I just bought a 2005 fx4 and there is a whining or whirring sound coming from the rear of the truck when I hit around 70km/h. the second i let go of the accelerator it stops.
Today when I got home after a 15 minute highway drive, i got under the truck and felt the differential area. it was warm but not hot. and there was a wet spot on it. i wiped off a drop of oil. there was also a wet spot on the bottom, seemed to be just water? I'm not sure.
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Back story, I've been borrowing my father's 2008 Prius off of him since I took a new job and my Tacoma doesn't get the best mpg, and finally purchased it off of him. Its making a new sounds though and he wants to get it fixed if its something major.
Its a quiet peeping that can be heard inside the car when coming to a stop (just when its quiet.) I've tracked the sound down to the engine bay but cant pinpoint where it is exactly, somewhere on the drivers side and its more of a pulsating whining sounds. The water pump was replaced about 10k miles ago at 65k miles under warranty.
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It's not entirely repeatable but only happens on tight left turns under deceleration such as a u-turn or turning left into a parking spot. The noise is a continuous whirring like a bit of plastic is rubbing the front passenger tire tread and continues for a moment even as I straighten the wheel out. I'm going to take the wheel off tomorrow to change my brake fluid and will take a closer look then. I'm on stock suspension and wheels.
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I have a 2006 Chevy Malibu Max with automatic transmission, 129,000 miles. It's got a higher pitched whine that increases as I accelerate between first and second gear and between 2nd and 3rd. I can't hear once it's in 3rd gear. It sounds like an RC car or early video game race car sound. I can hear it winding down as I slow down through those gears. It's also audible when the car is in neutral or park, but not then the brakes are fully applied. I can't really hear it in reverse.
I bought it used with 65,000 miles on it. I'm not sure what was done before that as far as maintenance/preventative maint. I did get a transmission flush three years ago (don't know the mileage at that time). I don't think this will impact things in any way, but I just changed the spark plugs and wires a few weeks ago.
It has a rough/shuddery idle (but doesn't feel like it's goign to stall out) and seems to be riding rougher than usual lately. I feel it more in the seat/overall car vibrations than through the steering wheel.
Transmission Oil Pump? Planetary Gear Set? I was really hoping to not have an expensive repair, but I am fearing the worst.
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Have some 'whine' coming from the rear differential under deceleration. In my case it just started occurring last night and seems to be audible over 55MPH and while in 5th or 6th gear after I let up off the throttle as to engine brake.
It seems like the answer or solution pertains to the input shaft pinion retention nut eventually backing off, as well as oil starvation to the unit, but has this actually been confirmed? My rear diff was replaced over 4 years ago under warranty after it failed and enduring 2 wheel drive for a bit.
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I parked the little dear in the garage about 9:30 last night. I went into the garage this morning around 6:30 and I noticed how still and quiet it seemed. I then opened the garage door and went outside for a few minutes. When I came back in, I hear a low whirring sound. I went back outside to listen, but it was definitely coming from the Prius, perhaps near the back, underneath.
The hatch was open; I closed it, but the sound didn't change. The fob was in the house, and I didn't open the driver door, so it wasn't the brake pump. It lasted at least 2-3 minutes, at which time I was too bored to continue listening, and I went back to weeding and watering.
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I've got a 2004 Elantra, 4 Door Sedan. My wife drove it yesterday and parked it. She later attempted to start it, and it won't start. When she turns the key, the car makes whirring sound like it's about to start up and gets to the point just to where it should turn over, but never does. Lights come on, etc, so it appears it's not a battery issue. We're not super mechanically inclined, but sometimes things like this can be easy fixes.
On another quick note: her car had it's engine light come on a few weeks ago. Took it to the car parts store and read it as a catalytic convertor issue. It went away after she refilled up on gas, so we figured maybe it was some bad gas.
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