Automatic Transmission Problems of Toyota Prius - part 1

The contact owns a 2006 Toyota Prius. The contact stated while she was sitting in the vehicle that was parked in the garage, the vehicle accelerated on its own and proceed to move forward while the emergency brake was on, and no warning light illuminated. The vehicle struck the contacts home going inside the home. The contact stated the vehicle was not on, but the vehicle started on its own once the vehicle was pulled from the inside of the home. The contact legs when stick in between the front side door and the vehicle and but did not have any minor injuries and did not seek no medical attention. The airbags did not deploy. The police report was filed. The vehicle was not towed. The dealer or the manufacturer was not contacted. The failure mileage was 168,000.

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2022 Toyota Prius. Consumer writes in regard to unintended acceleration.

The contact owns a 2012 Toyota Prius. The contact stated that after the vehicle was parked in a residential garage, it started to roll away in reverse independently. The contact stated that the vehicle rolled all the way into the street knocking her down to the ground and into a mail box. The contact sustained a laceration to her left leg which required medical attention. The dealer was not notified of the failure. The vehicle was repaired. The approximate failure mileage was 23,900.

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The contact owns a 2008 Toyota Prius. While parked the contact stated the gear shift would not move from neutral to drive. The failure occurred intermittently. The failure would occur when the gear shift was also in reverse. The contact shut the vehicle off and after several attempts was able to move the gear shift to the desired gear. The vehicle was not taken to the dealer for diagnostic testing. The vehicle was not repaired. The approximate failure mileage was 57,700.

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Exiting from a parking garage. After passing through the pay line, I headed down the exit ramp toward the street. The vehicle refused to accelerate as I pushed on the accelerator. . It did very slowly accelerate to 11 mph and then started to decelerate. I stopped the car on the ramp, turned the engine off and restarted it. After that, everything was fine, and I was able to drive home. . If this had happened while I was trying to merge into traffic. It would have been hazardous.

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On the day prior to the event, the weather was around 55 degrees and misty with occasional light rain. Our 2010 Toyota Prius iv was parked during most of the day. While driving on interstate 35 in texas going 70 mph, all of a sudden 4 different warning lights illuminated on the dash along with the large rectangular warning message saying "check hybrid system". The vehicle lost power to the wheels, the accelerator did not work even though the gasoline engine was still running, the vehicle coasted to the shoulder where it was immobile and had to be towed to the nearest Toyota dealership. This was the first time we had any trouble with the vehicle. The odometer reading was ~3,500 miles. The dtc code was dtc p0a3f "drive motor a position sensor circuit". The dealer initially replaced the entire inverter assembly, which did not correct the problem. Then they replaced the entire transaxle for the vehicle. This corrected the problem. I do not have either of the parts that were replaced, although I am sure Toyota does have the parts.

My 2006 Toyota Prius was parked in a driveway. I powered it on then tried to put it in drive. The shift kept bouncing out of drive without my moving it, into n, r and finally back into drive at which point I released the hand brake, then eased my foot off the brake pedal. I did not pushed the accelerator pedal in order to turn onto the road slowly. But the car suddenly accelerated really fast. As it did so the red triangle 'problem - check engine' symbol came up on the dashboard. The car went across the road and into a neighbor's front yard where there was a lot of snow and a snowdrift by the road, and ran straight into the snowdrift which stopped it. I was then able to turn off the power. The foot brake had had no effect. The car was heading on a line at right angles to the house and had there not been that snowdrift there, would have hit the house head-on. This was not driver error, but 'uncontrolled acceleration'. There may be a connection to the following battery failure: on 1/11/11 a recently installed start-motor battery (installed 1/3/11) went dead, after 1636 miles, and had itself to be replaced. The car is now being checked by the local Toyota service and dealership.

The contact owns a 2004 Toyota Prius. The contact stated that he applied the brakes and depressed the shift button to shift into park. As he removed his foot from the brake pedal, the vehicle then rolled forward until pressure was reapplied to the brakes. The contact noticed that there was a malfunction in which the vehicle was not actually shifted into park after he engaged the park button. The failure recurred intermittently. The vehicle was not taken to have the failure diagnosed or the vehicle repaired. The failure and current mileages were 52,700.

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I have a 2010 Toyota Prius version 3. When I push the dash button to put the vehicle in park, the car sometimes will roll 1-2 inches forward before engaging in park. The dealer was able to duplicate the problem on 01/04/2011, but stated that this was normal because when engaging the vehicle may not have been in the right position for go right into park vs. Needing to move a little bit so it engages properly.

The contact owns a 2008 Toyota Prius. The contact stated that he shifted into reverse gear and the vehicle moved forward. He was able to apply the brakes in order to stop the vehicle. The contact stated that the failure occurred approximately ten times but he did not take the vehicle to an authorized dealer. He stated that the failure occurred in a parking lot when the brakes were applied and crashed into another vehicle. No damage was done to either vehicle. The driver sustained a knee injury. He called the dealer and they referred him to the manufacturer. The manufacturer was called but they have not returned his call. The failure had been on going for six months. The failure mileage was 19,000 and the current mileage was 22,300. Updated 10/05/10 updated 10/07/10.

My 2004 Toyota Prius has left me stranded for 15 minute periods of time while parked on my street. All the dashboard lights come on as well as the following red warning "caution - transmission "p" lock mechanism is abnormal. Park in a flat place and apply brake. " I was parked on a mild incline and I always use my parking brake. This however makes me suspicious of whether the parking brake is hardy enough to work when parked on the crown of a street parking space. I applied and re-applied my parking brake without success. I open and closed the hood without success. I open and closed my door without success. I placed all my passenger seat items on the floor without success. I held the ignition button without success. I placed my key fob into the ignition without success. And when trying to remove my key fob so I could go call a tow truck, the entire dashboard housing for the ignition key came loose and dis-articulated in my hand. I just carefully pushed the plastic housing back into the dashboard. . . . However, that was depressing to see. Finally, after all the tinkering for 15 minutes, my car finally turned off. I was then able to turn it back on and drive away without a problem. In retrospect, this has happened on at least 4 occasions since December 24, 2009 and I just assumed that during the bout with my injured leg that I was not adequately placing enough force on the parking brake. . . . . But should this happen so easily?? I have seen many other similar complaints online. I would like to know if this is part of the whole safety issues with cars not being able to stop while running. Thanks.

2003 Toyota Prius - developed rattle and took to the dealer. After a long examination, dealer determined the problem was with the power steering rack. Dealer acknowledged that there had been no accident and could not determine a cause. The repair cost quoted was $3,500, one half of the resale value of the car. I contacted Toyota motor sales and was told that since the car had approx. 62,000 miles, they would do nothing. The dealer has indicated a willingness to negotiate on the repair price.

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2010 Prius ii, purchased late July 2009. In November of 2009 the car refused to stay in d when attempting to pull out of a parking space. After turning the system off and sitting for about 30 minutes the car operated normally. The same thing happened again that afternoon. A few days ago my wife was preparing to cross a 4-lane highway when the car "popped" into n from the d position. After several "reboots" the vehicle would still not stay in d. Then my wife held the joystick in the d position and was able to drive it back to our house (about 1 mile). An hour later the car operated normally.

Severe safety concerns with a 2008 Prius are the following: the answers and solutions to the following are necessary before anyone could be considered safe driving this 2008 Prius: 1. Why did our Prius have a power failure on April 13th while driving at 60 mph on a flat stretch of hwy 101 going north at the blithedale exit in mill valley, CA? 2. Why while driving up divisidero around 11:30 or 12 noon on April 25, 2010 did the car begin beeping loudly when going up the hill in pacific heights? 3. Why did it then start making two different beeping sounds? we then pulled over and found that the transmission indicated that it had jumped into reverse even though the car was still going forward. We had not touched the shift lever, both hands were on the wheel. It jumped into reverse by itself. 4. Why , after we then returned the shift to drive, were we able to go further up the hill and the loud beeping started again while the transmission was still in drive? we stopped the car and kept a foot on the brake pedal until help arrived. Aaa came. Aaa drove the car without beeping to a more level part of the street to load it upon a truck and carried the car to the san francisco geary Toyota service center. They have yet [5. 20. 10] to accurately diagnose and correct these problems so it is safe to drive.

After reading about the run a way Prius in san diego Monday, I attempted to put my Prius in neutral. Neutral does not exist or does not work. While accelerating one cannot put the Prius in neutral. This is a concern. I called the dealer and the rep said that Prius' are a breed all there own and pretty much agreed that the neutral did not work. People should know this.

Purchased 2010 Prius on Aug ll,09. Have returned to dealer 5 times, beginning on sept. 29, 09, to report same problem. . . Which is that at random times when I shift from "p" to either "d" or "r", the vehicle lunges and when I apply the brake, it is like hitting a brick wall. This process is repeated several times in sequence. . . Lunge, brake, lunge, brake. . Then it corrects itself and drives normally. I cannot predict when this will occur, sometimes it is weeks and hundreds of miles between occurrences; sometimes only a few miles and hours between incidents. The dealer always says they have not been able to reproduce the problem, therefore no diagnosis or repair. I have reported to Toyota customer ser. And was assigned a case #. Have had ongoing conversation with tcs rep to report this and several other problems, I. E. Various warning lights at inappropriate times. . . "key detected in vehicle" while driving down the road. . . Etc. Am always told "scan shows no problems". I think there is a problem with electronics. Unsafe, frightening. Latest incident on 3/05/10. Dealer installed software fix for brake recall on 2/10/10. At times must repeatedly move gear shift lever before it responds.

While turning into a parking spot, I experienced a total loss of braking while the vehicle began accelerating without gas pedal pressure. After jumping a curb, the brake pedal became active and the car was stopped.

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My wife and I were on our way to the Toyota service center, 1357 richmond rd. , charlottesville, va 22911, for a 50,000 mile routine service appointment for our 2007 Prius. While driving at about 45 miles per hour in traffic on route 29 the accelerator pedal suddenly lost power. The brake, steering and display panel continued to function. We rolled to the side of the road, cutting through one lane of traffic without power. We stopped at the side of the road and turned off the ignition. When the ignition was turned back on the power returned to the accelerator and we continued to the Toyota service center without further incident. We described our problem to the Toyota technician. When I picked up the car at the end of the day the technician said that they checked the computer system and did not find any problem so no action was taken. This was the first time that this car lost power to the accelerator. We have not had any problems with it until now. We are concerned about the possibility that this could happen again since the problem was not diagnosed. It could result in a serious safety problem if it occurred in traffic on a highway.

Automatic Prius 2009 sometimes even though I shift to a new gear it sticks. So if I went in reverse and shifted out so that I should now go forward, the car goes in reverse. This happened the opposite way too. It has happened at least once a month.

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I brought my 2010 Prius in on 2/5/10 for the service work relating to the recent recall. Today, the problem recurred; however, this time, my car slipped while I was driving (but not braking) as I was turning west onto congress from northbound columbus. The road surface there is uneven. Previously, this situation occurred only while braking on an uneven road surface. This time, I put on brakes prior to entering the turn; I was not braking at the time the car slipped. The car did not surge, but I did feel momentarily like I had lost control of it.

The contact owns a 2003 Toyota Prius. While the contact was driving 5 mph out of a parking lot the vehicle suddenly stopped accelerating after the vehicle traveled over a patch of ice. The vehicle has not been taken to the dealership and there were no prior warnings. The current and failure mileages were 150,000. Updated 03/30/10. Updated 09/28/10.

Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6) [xxx]I own a 2007 Prius that I bought new in 2007. It's been a good car except for one dangerous safety problem. Background: I am 57 years old and a 20 year + car salesman and that happens to be a certified Toyota consultant. My background also includes 5 years as a service manager for a domestic. The 2007 Prius has an automatic cvvt transmission with a traction control feature. Problem: the danger is the moment traction control is triggered a lost of traction by a signal from the wheel area it "powers down" the engine to no power for 1-2 seconds it takes the system to recover. Hitting a manhole cover or a pothole going down broadway at 30 mpg can set it off but the most dangerous situation is pulling onto a busy road. The seconds it takes to recover seems a lot longer when you are in traffic. The sensors in the wheel areas that activate the traction control feature are set up too sensitive. The Toyota advisors know of no reprogramming fix either. Toyota offers no shut off for this feature. It is horrid trying to get up the slightest snowy incline. I'm no engineer but suspect it's a feature selected by Toyota to protect the cvvt transmission against the enormous torque produced by the hybrid motor's almost 300 foot lbs. I would be happy to show you. The Toyota service advisors did not need to drive it. They are aware of the complaint. I contacted the service departments at both groove Toyota on s broadway and go Toyota on arapahoe both were very courteous and professional. Both of the service advisors told me that there is no fix because the system was designed that way. I have 39,500 miles and am on my second set of 4 tires. The two advisors I talked to told me that there are many of the same complaint and that Toyota's suggest to keep new tires on the car. I found it strange that both said to call Toyota but that I won't get anywhere.

I own a 2009 Toyota Prius. I was pulling into a parking spot in a shopping center when my car suddenly accelerated. I hit a small tree and the car beside me. The car is being towed to camelback Toyota in phoenix az. The car seemed to accelerate even though I stepped on the brake. I did not step on the breake hard but the car just pulled ahead.

I brought my 2010 Prius in on 2/5/10 for the service work relating to the recent recall. On the way home, the problem recurred; however, this time, my car slipped while I was driving (but not braking) on illinois east of michigan, where there is a metal plate on the road. Previously, this situation occurred only while braking on an even road surface. This time, I was not braking. The car did not surge, but I did feel momentarily like I had lost control of it.

I have a 2006 Prius. When going over bumps, I experience a total loss of power for 1 or three seconds -generally. A yellow light also comes on the dash board. It often happens daily. I have only had one or two experiences when the power didn't return so quickly and then I was afraid because I had no brakes and was just skidding. I believe that I have seen this problem discussed by other Prius owners of chat sites. It can occur at any mileage speed but I was only able to put a mileage number in the box can it be fixed?.

I was driving 2010 Prius type iii on downhill. Because it was downhill, I released gas and prepared to push brake. The road was slightly turned to right side and the surface was a little bumpy. When the car passed the bumpy surface, it suddenly accelerated even though I did not push gas. As the result, I pushed the brake and fortunately the car stopped. However, I definitely felt the car was accelerated suddenly at high speed(I do not know how much it was accelerated).

I am also an owner of a 2010 Prius. I have driven this car since August 2010. When you go over a bump when braking there is a sudden burst of acceleration. It absolutely happens and is reproducible. I go over the same bump every day on my commute home, and this happens repeatedly. It has never caused an accident, but it is a defect and is disconcerting. Given the other acceleration problems Toyotas have experienced, this needs to be investigated.

I have a new 2010 Toyota Prius, purchased 15 Jan. 2010. I have since put 3,292 miles on the vehicle on a trip from washington to California and back, during which conditions from mountains, snow and ice, and dry freeway conditions were encountered. The random problem occurred several times when using the brake pedal to disconnect the cruise control to slow down. The problem is most pronounced when the power applied to the vehicle is increasing to maintain selected cruise control speed. When the brake is applied in these situations, the vehicle tries to accelerate for a second or so, giving the driver the feeling of not being in control. The problem is most pronounced when climbing a steep (6% to 8%) grade. In those cases (2 to 3 times) the power surge was pronounced and seemed to last for 2 to 3 seconds with the smell of burning brakes after the acceleration ended. On the freeway, while the problem is less severe, the driver is left with an uncomfortable situation if coming up on a slower moving vehicle as your vehicle continues to gain on the vehicle ahead even though you are trying to slow down. These incidents occurred over a period of three weeks, so the date below is not accurate.

I have a 2010 Prius and saw an article about there being possible brake problems with the model. I have had this problem probably about 6 times since I got the car last July and, when I mentioned it to the dealer, they said there wasn't anything wrong with the brakes when they ran the diagnostic. When it happens, I'm in the process of braking, and there's a "push", almost like the brakes didn't "take", followed by a loss of steering for a second or two. It's also happened to my husband one time. There doesn't seem to be any rhyme or reason as to when it happens (wet road vs. Dry road, turning or going straight, flat or hill). I originally associated the problem with the brakes because I also have the "sliding" icon come on the dashboard when I'm completely stopped and lean forward in my seatbelt. However, I'm now wondering if it's not the brakes, but the transmission, since it sort of feels like it's not downshifting when it's supposed to, or it shifts back into a higher gear for a second while braking. I came to this conclusion after waiting in the car while it was running. With the car on, emergency brake on, but not in park, there was a definite "jolt" when the gas engine would turn on and then off again a few minutes later. Although there hasn't been a crash yet, there were two times when it came really close to that, as I was turning and almost hit the cars on the side street that were in the left turn lane waiting to turn onto the street I had been traveling on.

While braking at a speed of about 25 mph, wheels hit a pothole and the car seemed to accelerate and lurch forward for a fraction of a second before braking resumed.

With the motor running, the transmission in park and the emergency brake set, the car lurched forward. The engine was warm at the time. On another occasion with the transmission in reverse and the brake pedal depressed, the car lurched rearward almost striking a pedestrian.

I own a 2007 Prius with 35,000 miles on it. We have been a 2 Prius family for 6 years, so I am highly familiar with driving one. I have had three very frightening incidents happen in about the last 4 months in my car. Each has happened in exactly the same spot during a commute that I do several times a week. I have been exiting from a freeway, going 65 mph, down a gentle downslope. When I exit (continuing the downslope) the engine starts revving at a speed that I never have heard during any normal driving circumstance. This is while I am braking to stop at a light at the bottom of the exit. I have had a car next to me roll down the window and the driver ask if I needed help. Over the last 15 years I had done this exact exit thousands of times, in many different vehicles, and have never experienced anything remotely like this. Each of the three times I shifted the car into neutral, but the high rev continued. The only thing that stopped it was to pull over and to turn the car off and restart. I immediately checked the floor mat each time and it was mounted securely exactly in place hooked on the mounts. This has happened three times, completely randomly. I took the car in to be serviced at Toyota of berkeley on 2/2/10 and was told that until the car did this on a "frequent" basis that there was nothing that Toyota could do. He checked the log for warning lights and there were no entries (I checked the dash each time this has happened, and no lights warning lights were on. ).

2006 Prius was arriving at work and pulling into a parking space. My foot was removed from gas, but accelerator stuck open. The car bounced over the concrete curb, over a snow bank and over a second curb into the university driveway. Car sustained $3800+ in body damage and another $370 in service repairs for brakes, tires, suspension and dash warning systems that erupted. Vehicle was recently repaired. Local dealer would not accept any responsibility or acknowledge any problems with the car. Final repair invoice states the vehicle floor-mats, abs and pedal stroke sensors were all working properly. Claim was made to our insurance company [erie insurance].

Several near miss incidents due to no acceleration on slippery surfaces - wheels do not even spin to no traction is even possible. This is especially so when pulling into traffic on snowy days. Simply unable to get out of the way of oncoming traffic. Toyota dealer tells me "this is normal. " I am 63 and of all the vehicles I have owned, this Prius is the only one with this problem. I could be dead, or someone else could be dead.

Sudden acceleration loss of braking while driving over bumpy road at slow speed. This has happened several times. No accident resulted. Having read reports of this in the news, I wanted to report it as well.