Toyota Sienna adaptive cruise problems

Filed Nov 7, 2026 · Acceleration, Engine · NJ

the engine stoped unespectly the cruise control also stoped after a warning light apear.

Filed Mar 25, 2024 · Transmission · UT

On Sunday, [XXX] (at 78,793 miles), our MY17 Sienna XLE AWD suddenly displayed a Malfunction Indicator Lamp (MIL) and a message advising "Check AWD System". The vehicle disabled its cruise control system and AWD system, and no longer displays the Eco indicator when traveling at constant speeds on flat terrain. There was no obvious change to vehicle shifting behavior; the shifting has always been sluggish and occasionally "hangs" at higher RPM before downshifting. There were no symptoms or MILs prior to this incident. We consider AWD to be a safety feature when driving with snow or rain, and we frequently traverse Box Elder Canyon where the summit is nearly 6K feet above sea level. We stopped by an auto parts store (O'Reilly) where they pulled codes from the OBD-II sensor. Their reader showed 3 codes: P2714, P0741, and P2757). The vehicle is currently at Young Toyota in Logan, UT. Young Toyota advised that while the vehicle codes are consistent with bulletin [XXX] , that it is not included by Toyota under their list of affected transmissions. The service agent said a solenoid that governs locking the torque converter was "stuck". Since it is outside the 60K miles/60 month powertrain warranty, Toyota is unwilling to provide goodwill towards a fix. The dealer recommended a "software fix", which may or may not solve the issue, and that a transmission replacement would follow. I am simply in shock that a vehicle we purchased new, have carefully maintained (including through Toyota's maintenance plan for 60K miles), could potentially have a failing transmission below 150K miles. This is the UA80F 8-speed automatic transmission, which I believe was first-equipped on the MY17 Sienna, replacing a reliable 6-speed A/T. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Dec 30, 2022 · Tires · MI

Costco installed 4 tires on my 2012 Toyota Sienna on 11/10/2021. The tire had 80,000 mile warranty. At the time of Tire installation, the mileage on my vehicle was 253,405. I did my tire rotations every 5000 mile at Suburban Toyota in Farmington Hills. I took the vehicle for tire rotation at 283,618 miles and the dealership refused to rotate the tires because the tread was below 3/32 seconds. I thought that this was a mistake and went again to rotate the tires at 288,789 miles. I went to Costco on the same day and told Costco representative at the counter [XXX] that the tire needs to replaced under warranty. I informed him that I drove only 30,000 mile on the tires. He checked all my mileage papers when I did the tire rotations. He went inside and talked to [XXX] (Tire section manager) and told me that the tire need to be under 2/32 seconds for Michelin Warranty to work. I asked him to arrange a tire rotation and scheduled the tire rotation on 12/20/2022. I took the vehicle to Costco on 12/20/2022. The mechanic called me after 30 minutes and informed me that the tire tread is under 2/32 second and cannot be rotated. I talked to [XXX] about it and he went to talk to [XXX]. He told me that the mechanic is going to rotate the tires and I can come back after one month to check the tires again. I informed [XXX] that he, Costco, and Michelin are playing with the safety of my family. He told me that Costco is not concerned about the safety of my family. If I am concerned about the safety of my family, I should change the tires without the warranty. I believe that Costco and Michelin are installing 30,000 mile tires as 80,000 mile warranty tires. I drive most of my driving on the freeway and on cruise control. So there should not be any issue with my driving. I got tires from Discount Tire Company before and had no issue like this. I request NHSTB to investigate the issue and warn people of this issue before people die. INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).

Filed Jul 13, 2021 · Acceleration · NM

I have a 2000 Sienna with 305000 miles. I have never had trouble with this vehicle until about 2 weeks ago. When I am stopped and my car is in drive, I just tap the gas pedal for a second and the engine RPM will increase to about 2000 RPM and will stay there until I put the car in neutral or turn the engine off. This is a problem because my breaks barely hold this and I must put the car into neutral for the car to stop pulling forward. Putting the car into neutral resets the rpm. If there is no car in front of me, I can release the brakes and the vehicle will continue to accelerate until the transmission switches to second gear, at this point I can drive normally. One time the vehicle continued to accelerate even after switching gears, I put the vehicle into neutral and the engine went to over 4000 RPM, the brakes could not stop the vehicle, I had to turn the engine off. The gas pedal is not sticky or stuck, floor mats are not in the vehicle. I can rev the engine normally when I am in park, this only happens when I am in gear. I have checked the Throttle Body, Throttle Position Sensor and disabled the cruise control module, I can see no reason for this to happen. I have seen many complaints about this same issue online but have not found a resolution. I can buy an ECM but this is an expensive trial. I will take it to the dealer from here.

Filed Apr 22, 2020 · 32,148 miles · TX · 1 injury

The pcs stopped our van abruptly with no warning and did not slow down. Cruise control set at 75 MPH north bound on tx hwy 69 between alto and rusk, tx. No rain smooth road late at night only the car in front of us. No other traffic. I screamed. Husband had fallen to sleep at the wheel even though we had taken a long nap in huntington, tx. We were on our way back home from my sister's funeral in nederland, tx.. I could see inside the read window of the car we stopped behind. No collision but injured my neck. Have medical records, was treated for neck injuries in jacksonville, tx and tyler, tx

Filed Dec 17, 2019 · 125,520 miles · WA

Unintended acceleration problem. Two episodes, months apart, both at very low speed. Was stopped behind two cars. Two cars in front started up to go through intersection. I took my foot off the brake and moved it to the gas pedal. Car started up normally. Then a child pushed to crosswalk signal which started to flash. I moved my foot to the brake pedal, and the car started slowing down normally, but then the car suddenly lurched forward. Both I and the passenger thought we had been rear-ended (but there was no car behind). It was a similar feeling to when the cruise control kicks in to accelerate, but no cruise control had been activated. I took my foot off the brake and slammed it back on the brake, and the car stopped. The previous episode had a similar series of events.

Filed Oct 22, 2018 · Brakes, Electrical · 160,000 miles · KS

When driving the vehicle regardless of speed or driving condition the traction control system randomly activates (it is always when going around a curve, but road conditions are dry, speed could be 70 or could be 20, there is no loss of control by me as a driver). This causes the car to abruptly brake. The computer system shows no issues when the dealer looks at it. When I deactivate the traction control system using the button the van will still beep loudly indicating a loss of traction control. It will also kick off the cruise control, but does not activate the automatic braking feature. This has been happening daily for 2 months with multiple visits to repair shops.

Filed Jun 26, 2018 · Acceleration · 13,000 miles · IN · crash · 3 injuries

Tl* the contact owned a 2015 toyota sienna. The contact stated that the cruise control failed to deactivate when the brake pedal was depressed. As a result, the vehicle was involved in a front impact collision. The air bags deployed. The contact sustained a severe head injury, the front seat passenger sustained a broken nose and cracked ribs, and the rear seat passenger sustained minor injuries. Medical attention was required. A police report was filed. The vehicle was destroyed and towed to a salvage yard. The manufacturer was notified of the failure. The failure mileage was approximately 13,000. The VIN was not provided.

Filed Jun 28, 2017 · Electrical · 36,200 miles · IN · fire

The dash was randomly freezing for about 5 minutes and then reset itself while driving. Once it reset itself, it went back to the default settings. It was at heart city toyota multiple times for this problem. Each time they said that they could not get it to duplicate the problem. After dropping it off in april of 2017, the technician stated that he was able to duplicate the problem of the dash resetting. He did a software update and a hard-reset in order to try fixing it. Low and behold, two days later it happened again. After having it at heart city toyota to have the problem with the cruise control light flickering, for the fifth time, fixed, I reported about the dash still having the problem of resetting itself. The manager of heart city toyota told me at that point that I am not welcome back to their dealership. After contacting toyota corporate about this, I was told that they are able to refuse service even with the warranty still present. They explained that I needed to take it to another toyota dealership to have it diagnosed. So I contacted jordan toyota and explained the situation. The service manager there informed me that if heart city toyota was not able to diagnose the problem, then they were not going to start from scratch to diagnose the problem themselves. Three weeks later, while driving on a county road, the dash began to smoke and I pulled off of the road. When it began to smoke even more, I exited the vehicle and as I was getting as far away as I could I seen flames. I called 9-1-1 right away. By the time the fire department was able to get there and extinguish the fire, the van was destroyed. Which ended up being a total loss. All of which seemed to be due to an electrical fire in the dash. Luckily no one was hurt.

Filed May 22, 2017 · Electrical, Suspension · 7,000 miles · IN

I have a 2015 toyota sienna xle with 35,800 miles. - (no specific conditions or driving styles) it is on it's third transmission (second replacement was at 29,800 miles) - newest recall on the side doors opening randomly. - (no specific conditions or driving styles. Happens completely randomly) cruise control lever light flickering. It was replaced three times now. It was just replaced the third time recently, so I'll see if it happens again. - (no specific conditions or driving styles. Happens completely randomly) dash randomly freezes for about 5 minutes and then resets to the default settings (it has happened seven times and continuing) and toyota still cannot figure out the problem. - (while driving on a clear day on a city street) climate control shut off completely by itself without touching any buttons while driving. I was able to turn it back on, but it should not shut off without any action. - bad support bearing for axle on front passenger side (22,900 miles)