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.
View 19 RepliesI finally got a recording of this, after trying to describe it without much success. Dealer drove the car 2x and claimed they don't hear it.
Video here, turn up your sound... noise happens just as the gas is let off...
As you can hear (if you turn speakers up, recording isn't very sensitive), it's kind of a high pitched whistling sound or whining sound. Happens when coasting (foot off gas) at 60mph. In gear or neutral, same noise. Only around that speed, only when foot off the gas.
What do you think this is? Some have suggested wheel bearing but if you listen this is more of a steady high pitched noise, not a helicopter like sound.
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.
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.
View 19 RepliesI'm stuck in a bad situation. With my work schedule it will be literally a month until I have time to look at my car during daylight. I may be able to drop it off next week.
Anyhow, the R is making a horrendous high pitched noise while coasting to a stop. This starts at just under 30 mph and is most pronounced in neutral. Accelerating in gear stops it. It is loud inside and louder outside and there is some rough "clanking" associated with it. My guess is a belt or bearing. It is coming from the front passenger side.
Yesterday after a 45 minute drive home (GA and above 90 degree heat), I noticed a moderately high pitched whining noise after shutdown. The noise continued for about 5 minutes. From my understanding, the inverter coolant pump redistributes the coolant after shutdown and I have heard a humming noise previously which I assumed to be this action.
View 10 RepliesI'm rolling down the freeway in stop and go traffic, so I have been EV stacking. Clicked from EV to HV several times over the course of 5 minutes. Then, I hear this fairly high pitched revving sound - even and constant rev up, not rev/idle/rev. I thought it was the truck next to me, so I turn down the radio and away from the truck but it happened again. I would stomp on the gas for a moment, and it would subside - not completely because it would start doing it again very soon. I'm not accelerating, but it would be like throwing it into neutral and revving. When I come to a complete stop, it would not go to EV - the light isn't on like when it is warming up the ICE.
My exit was coming up soon, so I would alternate pumping the brake and gas to get it to stop. Only when I was at the light that I powered off the car to reboot. Since then, it did not recur. Strange... Perhaps related, but I doubt it - I had bumped into a vehicle around 3-4 mph the day before. I was... drowsy.
I have a 2002 prius with 147612 miles on it and a problem with my braking system. When I turn on the car the ABS and Brake light turn on and there is a high pitch sound that beeps continuously. Sometimes after a while the warning lights and beeping stop only to return a little while later. I can drive the car when the warning lights are on but i have to press harder on the brakes than normal to get the car to stop and the braking system feels looser. However, when the warning lights turn off I can brake as i normally do and the system feels normal. This problem goes on intermittently as I'm driving.
I took the car to the dealership today and paid $143 for a diagnostics and was told that DTC C1251 was retrieved from the diagnostic computer. The technician told me that the ABS Motor is bad and because of that the car thinks I'm skidding so the ABS shuts off. He recommended that I get the ABS Motor ASSY ( Part #47071-47010) replaced.
Also, I read a post to resolve it by flushing the brake fluid. I checked the brake fluid level in the cylinder and it is at the max level and there aren't any leaks. Would that be an option?
About a month ago, I purchased my 2013 Prius Four. I've put on about 2,500 miles so far and recently started noticing when I start the car up, it is giving off a high pitched squeaking noise. This happens both when the car is using the electric battery and when I can feel the gas engine kick in. After about a minute or two, the noise goes away and doesn't come back.
View 5 RepliesLast week as I was returning home I had a strange event in my Prius. I was coasting at about 30 mph when I heard a very faint pop sound a bit like a balloon breaking. It sounded like it came from the right rear area of the car. Afterwards I thought I detected a very faint chemical smell. Could this have been something involving the HV battery?
View 10 RepliesI have had my certified 2010 Prius II, not two because it is a 2010 and 2010 used uppercase roman numerals for model designation, with 82000 miles about 3 months and sometimes when I apply the brakes I hear a high pitched whirring noise. I think the closest thing to compare it to would be a skill saw but not that loud.
View 2 RepliesWhen 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.
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....
View 6 RepliesI am a V8 owner and have about 6,000miles on the car...recently the car has been making really high pitch exhaust sounds (rasp/high pitch/weird) @ WOT...it did not do this before...
View 2 Replies I just got my MKVI late January, and it currently has 3k miles on it. 2DR CSG.
Almost everyday in the mornings when I drive my car to work, there is this high pitch ticking/clacking sound coming from the passenger side vent/dash/A Pillar area.
It only happens over dumps on uneven surfaces or when I launch from a stop/red light. Keep in mind I have a manual. Its a rapid ticking/clacking sound that goes with the uneven surface or any sort of vibration on the road.
It usually goes away maybe after 20 mins of driving (I'm thinking it has to do with the temperature warming up). Or if its sunny out, it just magically goes away.
I've brought it to the dealer at least 3 times with no cure, because it takes me at least 20 minutes to get there. The tech would literally have to come to my house in the morning and listen while i start the car up and drive to "duplicate" the sound.
I originally thought it was static coming out of the right speaker due to bad wiring. Had the right speaker replaced already, sound is still there.
So I'm driving home late at night, few cars on the highway, I turn off the radio and I hear a faint, very high pitched whine coming from the engine bay when going 40-50 mph. It sounds like an electric motor spinning at high speed and frankly it's a bit irritating. The sound is there whether the engine is running and charging the battery, the car is using the traction battery or it's coasting and regenerating power. The sound stops for a moment if I gently accelerate and then lift off, but it comes back on coasting.
It's different from the louder, low pitched subway-train sound that comes from regen braking at low speed. Could this be the dreaded CVT whine reviewers complain about? Or is it the normal sound of the MG1 unit? This car is really quiet so weird noises pop up more.
High pitched noise when car is running at idle and when not on the gas. Whenever I accelerate it goes away. Pitch/Loudness seems to be higher with RPM's. Could be coming from front of the car.
Checked so far:
I read some other posts about this and fully disconnected my aftermarket radio. I'm pretty sure it is not a ground loop as no power to HU shouldn't still create the whistle.
What I have:
I have an EIP aftermarket street exhaust. I checked the exhaust to see about the flapper, but I don't believe I have any of the items involved - maybe I'm wrong. After some more reading it sounds like a vacuum leak as it goes away upon acceleration. I need identifying what vacuum hoses are still in place/clamped off with having an aftermarket exhaust.
I do not have a CAI, just a K&N drop in.
I have a weird issue, whenever I'm driving in pretty wet conditions (or drive through a puddle and make a "wall of water") I hear a high pitched squealing sound. Sounds like it is coming from the front right (passenger side) of the car when driving in wet conditions.
View 7 RepliesI noticed when I first start of my 2006 Azera at night or even during the day and make the first turn of of my driveway or out of the parking lot at work there is a high pitched whining sound. Sounds like it maybe coming from under the car maybe from the back. I thought at first it maybe a belt (power steering) under the hood but it sounds like it coming from the back side of the car. It only does it one time mostly when its cold outside. What can it be?
View 8 RepliesHaving problem on mrk 6, sounds almost like a high pitched vacuum leak but I can't find it.
View 11 RepliesI have a 1997 Honda Civic w/ about 150k miles on it. The belt was changed a little under 2 yrs ago. Just started making a high-pitched sound when backing up. Sounds like a note on a flute, and doesn't sound like grinding. It only happens when backing up. As soon as I stop, shift and go forward the sound goes away. Began 2-days ago. I try to find parking spaces where I don't have to back up.
View 6 Replies