Prius (2004-09) :: Constant Variable Humming Noticeable When Driving Over 40 Mph
Sep 24, 2015
I was sure it was a wheel bearing I'm at 198k miles. I replaced all the wheel bearings in the car and the noise still persists. The old bearings were definitely in need of replacement so I'm fine with that.
Neighbor mentioned my rotors looked warped and they may be vibrating the calipers but the they don't seem to vibrate harder under heavy braking. There's no vibration through the steering wheel.
When I did the front bearings the CV boots are still holding up. I kinda busted some of the dry and cracking boots around the tie rods and ball joints but that's for another day.
Anyways, I run winter tires all year round being in snow belt and they are cheaper. Wear is worse on the front tires outside edges from cornering and I'm gonna replace and go for an alignment soon.
It has to be something that is spinning on the car from the noise I'm getting. Worse at higher speeds, constant variable humming.
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I've got a 2007 Touring with 40k miles on it. Never had any issues until about 2k miles ago, when we started noticing noise while driving on the freeway. The higher the speed, the louder the noise. It starts to be noticeable at about 40mph and gets really annoying at 65 - 75mph. It seemed to come from the RH-side, and the dealer was quick to blame it on out-of-alignment tires. Dealer 'investigation' was about 2k miles ago.
We've changed and aligned the tires this week; alignment on all four corners was almost within tolerances (off by a small amount). I've also changed the oil, since it was due.
Nevertheless, the noise is still there; now it seems to have 'moved' directly in front of the driver. What could it be?
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my 2006 GX has 95000 miles and recently i've noticed a slight hesitation followed by a slight surge in speed while driving at a constant speed. it almost feels like i'm pushing the accelerator then releasing it. its a very mild difference but i'm guessing tranny and have 5k left on my warranty. it occurs at a variety of different speeds but most noticeable at about 35-40mph and up around 55mph.
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It seems to me my Prius 2007 decelerates noticeably when I take my foot off the accelerator. It's noticeable but not even near the level of the engine braking in B mode. The change seems to have happened since my last service but the I won't swear to it, and the dealer says there hasn't been a software change.
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Our 2011 w/140,000 miles has a variable front end noise that I suspect from past experience with other vehicles is a bad wheel bearing. I've seen posts of the procedure for replacing the Gen 2 bearings that requires the hub and bearing be pressed out and new bearing back in which would limit the DIY'er, but looking at the replacement parts diagram for the Gen 3, it appears that the hub and bearing unit is bolted in with 4 bolts and may not need a hydraulic press to install.
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Had this truck a few years now, and it has always had a slight miss/hesitation and maybe a few codes. The timing chain skipped a tooth and the truck was down for about a year. I have 4 other trucks, so it wasn't a big deal. I finally had time to put a new oil pump, chains, guides, tensioners, phasers etc. The truck actually runs very well and quiet. But, now misses far more than I remember it doing.
When driving in town constant at 25-30 mph occasionally it will loose power for a brief moment(<1 second) and then be fine, the security light on the dash turns on for a few seconds. It drives at 55-65 just fine, unless I am going up a hill or something else increasing the load.
2004 5.4 3v 2wd
CEL-
P0453 (fuel tank pressure issue)
P0351 (ignition coil a primary/secondary circuit malfunction)
P0356 (ignition coil f primary/secondary circuit malfunction)
The coil packs are new, and I have injectors on order. Also found this thing on the back of the motor, it connects to the fuel rail on the drivers side. Where it should go. I looked on my other trucks. But my other 04-4wd has a box by the battery it connects to, but mine doesn't have any of that stuff. And my 08 doesn't have anything like this at all.
And a pix of the truck in question.
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Just got recently used prius 2010 and noticing low humming noise while driving.. every couple of minutes at slow speeds.. not sure how it is at higher speeds. Sounds that noise coming from somewhere front.. and remind like air conditioner in older car moving some parts when you switch from hot to cold . is that normal? sounds happen when ac is on and off.
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Right now I am seeing roughly 41 MPG and that is after changing the spark plugs with brand new NGK Iridium's, Air intake filter and did an oil change since it was due for one. I have driven the car roughly 2,500 miles since all of this stuff was done and it just seemed to continue to drop to the 41 MPG mark.
What I have noticed though is that when the motor turns off it shudders and the when it restarts while the car is in park the car will roll back and forth slightly. I have also noticed that the car seems to struggle to get up to the posted speed while climbing an incline and also while the car idles in park or at a complete stop there seems to be a bit of a miss fire. Could that be caused by a bad coil? Because I have tried everything short of taking it to the dealer which I really do not want to do again and be told there is nothing wrong with it when I know there is.
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I normally run my climate control in manual mode, and I notice that my blower doesn't always run at a constant speed. I know that if you use the Auto setting the fan will change speeds, but I didn't think it should do that if you are using a manual setting. Is that right?
I was thinking I would make an appointment with the dealer to check it out. But didn't want to do that if this is normal behaviour.
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I recently had the inverter pump replaced under recall. it now makes a the pump noise even when I am driving. I hear it when car is not fully warmed. Back when it had the original inverter pump, it only made noise at startup and shut off.
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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 started my 05 prius this morning, and it starts up and is running in normal time. But there's a constant long beep tone that doesn't shut off and after it starts it shoves the break pedal back out while my foot is still trying to keep it depressed. There's a brake light that is on after, but no error icon on the display. I didn't try driving it to see if it lets me, because of something possibly wrong with the brakes. What might cause this?
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Sometimes (but not always!) when I turn my Prius (2008) off and open the driver door, there is a constant beep. There are no interior lights left on. I think whatever I am doing wrong might be draining the 12v battery as it keeps going flat.
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I loved my 2009 Prius until this weekend. I just turned over 31,000 miles and now a loud humming noise has developed under the hood while driving. It has not been cold here and this doesn't start until I reach around 24 mph. It remains while the gas engine is running or I'm coasting with the engine off. The humming is there in D or in N and there no sound while turning. When I am under 24 mph the noise is gone. I have set up an appointment with my Toyota dealer for this week, but wanted to know ahead of time if any other Prius owners have had this issue.
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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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I can hear a strange noise from the front occasionally, independent to my operation. It sound like rolling a cassette tape in a old driver. The sound repeats every several minutes, and lasts about 5 seconds each time.
When I standing outside the car, it hears louder from under the bonnet.
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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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this is regarding a 2001 taurus sedan 3.0 liter 116,000 miles.She developed an intermittent starting problem. No particular time or situation to when it would do it.Had it diagnosed as a crankshaft sensor which was replaced. fixed the start issue but then had a noticable missfire or jerkiness to the car while accellerating. I was told it could be fuel filter so replaced that.After getting it back it still had a very noticeable jerking to the drive. Was next told it might need injector cleaning. The exhaust sensor light would come on at times. So it was suggested to change an injector in cylinder 1 as that was the problem cylinder. Not sure if that has fixed the problem as I have not yet got the car back as there was a problem reinstalling the tank that required parts from Ford to fix.If I get it back and it still misses what else could it be? I was told maybe a valve for that cylinder, does that say the end is near for this vehicle?
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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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I have a 2008 Prius, and I have a couple noises, one of which is related to the airplane noise. I've noticed recently mine starts to make that humming noise in the 50-60mph range (less so at higher or lower speeds). There is 44,000 miles on the car.
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I just purchased my brand new 2014 F150 4x4 STX 5.0L single cab short box about a month ago. I noticed when I drove it off the lot that it had a slight vibration at low RPMs. I boiled it down to brand new stuff working out all the kinks and running around for the first time, bought a brand new jeep in 2005 and it made interesting noises and had funny vibrations for a while, but this is starting to get annoying. I have a very noticeable vibration at low RPMs both in park and while driving, more noticeable at speeds between 35-45 with RPMs anywhere from idle to 1500 or so.
I have not had it at the dealer yet, I want to be armed with a little bit of knowledge when I go in an talk to them if possible. I know how stealerships work and since it seems similar problems are somewhat common in these newer F150s, I don't want to get the "oh it's common in these trucks and perfectly normal". In my opinion a brand new truck should run smoother than melted butter on hot flapjacks, especially one that only has 1400 miles on it.
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