Prius (2004-09) :: Whining From Engine Compartment When Coasting And Accelerating - Bad Transaxle?
Feb 17, 2016
I had whining from the engine compartment when I am coasting and accelerating, much noiser than in the past. I had been getting a C1310 code along with C1253 , C1241 and C1300, but I changed out the Anti Skid ECU and these went away. However I still get the red triangle of death VSC and ABS lights on after driving on the highway for about 10 minutes at speeds over 65. So I then got P0A2B 250 codes, Drive motor A temperature sensor. After it rested a while and I restarted the car, all but the red triangle would go out. After two more starts the Red triangle went away too. This happened for a few weeks, until one day after a trip, the car just stopped. Would not start at all, no ready light went on. Testing gave me a P0AA6 526 code, Hybrid Battery Voltage System Isolation Fault. Now I know the 526 could be multiple faults but with the whining and the P0A2B, I am thinking the transaxle is the smoking gun.
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Developed a whining type noise in my '07 prius engine compartment. Noise only there when gas pedal pressed. If I let off on gas the whining noise stops.
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I need to diagnose an issue I've had with my 2007 Prius with 79,000 miles on it. Several months ago I noticed a distinctive whining/humming noise coming somewhere from the engine compartment of the car while driving. The noise may be present at lower speeds, but the volume of the noise appears to increase proportionately with my acceleration and as such is most noticeable at highway speeds of 50 - 70 miles per hour. As I accelerate faster, the noise level seems to increase. If I take my foot off the gas and coast, decreasing speed, the whining noise gets lower in volume. I believe I first noticed this noise about 6 months ago, but wasn't more proactive about it like I normally would be because at first the noise didn't seem overly loud and my extended warranty unfortunately was up once I hit 77,000 miles. Now 6 months after I first noticed the noise, I believe it's definitely louder than it was when I first heard it, so much so that I can pick it out over the radio being on at a decent volume.
After checking some forums I thought the culprit might be a wheel bearing. I took it into a local Midas shop at they informed me that my passenger-side front wheel bearing was actually breaking apart in pieces. Obviously I had that wheel bearing replaced but I was also hoping this was the source of the whining noise. Unfortunately that wasn't the case as driving it home the noise was still present. They also said the tires were not balanced properly (from my Toyota Dealership no less when I had them install new tires) so I had the tires rebalanced as well. They did take the car for a test drive but probably stop looking for issues with the car as soon as they saw the wheel bearing in that condition. Also that shop does not specialize in Prius' or hybrids so they might not be able to notice the noise that shouldn't be there like I can.
Other than wheel bearings, where this noise could be coming from. Some posts on here possibly pointed to the ICE water pump or transaxle fluid (which as far as I know has never been replaced since I bought the car new).
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Any way, my 2007 Sonata with 57,000 miles just developed a whining noise on the right side of the engine compartment. It sounds like it is concurrent with RPM and I thought it might be the alternator, the drive belt or some pulley. I have even seen on the general internet that some others had a bad oil filter. To me, the noise seems to be coming from the alternator area. It is a relatively high pitched noise that almost sounds like an electric motor. Would love to get it fixed. I am nearing the 60,000 max on replacement from certain items and do not know if the alternator is covered.
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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 purchased a ES300h in March 2013. Starting end of September I noticed a rattle (pebbles in a tin can tumbling sound) when I went up a slight grade, accelerating from a stop, or accelerating after a brief coasting on the freeway. The first time at the dealer they said stop using Costco gas and use Top Tier. I used Shell and Chevron and there was a 80% improvement but the nuisance still continued, some days more and some days less, meaning when it rained it poured.
On the third visit to the dealer, with two specialists on a ride along of course it does not make that noise, but left it there for them to find the continued problem and they conceded it is engine knock to which there is nothing out of specs with the engine AND say that this is normal. I have never had a car do this, maybe specific to hybrids? The service advisor goes on to tell me that they filled my tank with 91 octane to stop the knock, BUT, the manual says use 87!!!
Some say this can lead to engine damage, some say only blown gasket, the dealer says no problem! A friend of mine has the same car and has no issues.
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First off it's a 2008 Prius with 80K on it.
There is a new sound that has started coming from the front of the car in the engine compartment or even lower. It is a turning turbine like sound that is mostly obvious when driving at 60 mph, but my guess is that it is always there, but not as audible at lower speeds. The air and heater are both off and have no effect on this sound. The only thing that could have had anything to do with it is that a day or two before, the tires were low so I filled them to 40 psi. The other thing is that it clicked over to 80K the last week and the friendly red maintenance required light came on.
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I have a 2004 Prius that has a ticking noise coming from the engine compartment It speeds up and slows down with the idle of the engine or the pressing of the accelerator. Appears to be coming from the passenger side (US). No diagnostic codes have come up.
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A few days ago, while on a road trip from CA to CO, I noticed a loud squeak from the engine compartment every time I pushed the brake pedal, no matter how lightly, no matter what speed. It even happened when the car was off. I have almost 60K miles on my '05.
When I arrived in Denver, I dropped the car off at a Toyota dealer for troubleshooting. They isolated the fault to a bad ABS actuator. They had to overnight the part, and spent a day and a half installing it. Sounds like a major project!
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I first noticed a strange noise coming from the engine compartment a day ago. I had left the car to sit in the sun for a few hours. When I got in the A/C was set to on and the system was on auto. I tested to see if the noise went away when I turned off the A/C and it did. I turned it back on and it returned. I know the A/C operates at different speeds based upon cooling needs and that it can get sort of noisy but I didn't think that it could/should get this loud. The system seems to begin working quickly and it does seem to put out cold air. If the noise is unusual do you think that it indicates another underlying problem in the A/C system?
Just to clarify, the ICE is not running in the video. The cabin fan is set to low and the temperature is set to low. The person in the car presses the A/C button and the cooling fans in the engine compartment come on as well as the A/C unit. The sound gets louder a few seconds in. Here is the link to the recording I made of the sound.
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I have a 2007 Azera with a 3.8 engine. It has 16000 miles without any problems. There is a clicking noise coming from the engine compartment when accelerating. The noise only occurs when the engine is cold and seems to be more pronounced when accelerating quickly. I do not hear it when the car is idling.
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My mechanics found today when the car is on the lift, that the transaxle oil is leaking a little. I can see the fresh oil there (not dipping though). He said to open the transaxle and change the gaskets probably will cost $300.
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I purchased this 2001 Passat with 138,000 miles on it approximately 4 months ago. Since the purchase I have had the timing belt, water pump and tensioner belt replaced, also replaced the valve cover gasket, plugs, plug wires, back brakes, back rotors, bushings and linkage in sway bar. Now it is making a whining noise when accelerating and when the engine is revved while in neutral. The power steering fluid is between min and max. What this could possibly be? I am about at my end with this car!!!
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I have an 08 Prius it has done 190,000 miles last week it suddenly started shaking from what felt like the transaxle. The car still drove and seem to shake a lot worse when it was in park or reverse it definitely felt like it was a bearing or something mechanical broken in the trans unit. After a bit of research I decided to remove the trans, strip it down and have a look convinced that I would find fragments of bearing or something blatantly wrong. Yesterday I removed the unit (nothing to be scared of, dead easy really) and today I have stripped the transaxle down (after viewing a very useful youtube video) much to my disappointment I cannot see anything wrong I am now thinking I was a bit too hasty and maybe it could be something else.
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My 2004 Prius Transaxle overheats and causes a warning on the dash. When I checked the fluid level I found pink foam in the resevior. Do I need to replace the fluid or bleed the system. Also the AC shuts down when this condition occurs.
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I've got 2013 es 350 with 10,000 miles on now. I have recently noticed that there was whining/whirring noise coming from the engine(I guess) while accelerating up to 45 mph. It seems that the noise goes along with the RPM since it gets louder when accelerating. It makes same noise when decelerating from 30 mph and it goes away when the car stops. A friend of mine drove the car once before but did not hear anything until I told him about the noise, so I guess it is not very noticeable to some people. At the 10,000 miles check up at the dealer, I mentioned about it and they said they did not hear anything, but I know for sure there is whirring/whining noise.
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I just bought a truck, it has a whining noise while accelerating, stops while letting on the gas, does not do it in neutral even if i rev up the engine. Only whines while there is some force on it, ie.. accelerating, or going up a hill at any angle, and does it from about 10-15mph- atleast 60mph.
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I seem to have gotten a hum coming from the front end when I reach 40mph & higher. Todate, I have not gotten any warning lights, red trinagle etc, but wanted to see if maybe there were some codes thrown.
Lastnight, I put the front on jack stands & had my wife put the car in D & step on the gas while I was laying under the car. The noise is coming from the transmission where the axles plugin. My fear is I need a new tranny.....but if its a code related to the hybird system, I might be covered under warranty.
By the way, my Prius is a 06 w/ 108xxx miles. I changed the CVT fluid around 70xxx miles.
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Car was deemed a total loss. I didn't think the damage was too bad and one of my friends at a bodyshop told me to go ahead and do a car buy back that I can't go wrong with a prius. My mother said $20 gas a week. So I did and gave my mom the difference. The Car drives going forward and in reverse just find. Besides the body damage I got underneath the car and I see a bent tie rod end and maybe a lower control arm. The thing is when I hop inside to move the car I notice the car reads transaxle disengaged and battery system won't charge in neutral.
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I have a 2010 Prius and need to change the Transaxle fluid. I have the Haynes repair manual, but it only shows the drain and fill plugs for the Gen II. I have found what looks like the drain plugs but am not sure of it. Fill appears to be right next to the CV axle and the drain is straight down from the CV axle. Are these the correct fill and drain plugs?
Also, this transaxle seems to have a whine to it. Whines only at kind of a neutral throttle. Throttle pressure or backing off on the throttle reduces the whine. Is this normal or what?
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My 07 Prius is leaking transaxel fluid into the inverter cooling system. Transaxel fluid is sweating through the inverter coolant hoses. Before my taking ownership of this vehicle, it had previously been in a front end collision (that’s a whole other story). Anyhow – if I replace the radiator, should that take care of this problem? Are there any other ways these two cooling fluids could become cross contaminated?
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