2006 Toyota Sienna vehicle speed control problems

“My vehicle steering/control has frozen a few times in the past 18-24 mos. This happens for me in wet conditions at slow speeds while trying to turn, usually to the right. The car also seems to slow on its own and pull to the side at these times. This has also happened while reversing out of a parking spot. I do not recall seeing any lights engage but I am more focused on steering the car safely and exterior factors at these times so I haven't noticed the dashboard. It feels like the power steering fails, and I have no control. Thankfully, I have not been moving at high rates of speed, nor been in a position to go into the lane of on-coming traffic or had someone in a lane near me, and have been able to hold in position or manually turn as much as needed. Steering seems to return once the turn is complete. I have been fearful of hitting someone or being hit from behind each time. My mechanic has been unable to recreate the experience and was unable to suggest a direct answer. I see others have had similar experiences and the same lack of answers from even Toyota. Having come across this website and seeing responses here to this exact problem I have had, I am…”

“The vehicle stability control system randomly engages and activates the brakes without cause. This can happen on a gentle curve going under the speed limit. It is very scary and I am afraid it is going to cause an accident. Internet research shows many owners with this issue and no information on the cause or a fix”

“While driving vehicle on dry, non slippery roads with slight to moderate curves, vehicle illuminates Traction Loss light, sounds alarm buzzer, and at times applies brakes and dethrottles engine, even when no loss of traction has occurred. This happens while driving on straight roads with slight unevenness. Had to disconnect wheel speed sensor harness to disable ABS/VSC system. When this happens, the vehicle automatically applies brakes to certain wheels and dethrottles the engine, this can pull the vehicle to one side sharply and can cause an accident.”

“AT SPEEDS OF ANYWHERE BETWEEN 30-60 MPH, TRACTION CONTROL SYSTEM ENGAGES WHEN TURNING SLIGHTLY LEFT. ALARM COMES ON, BRAKES ARE AUTOMATICALLY APPLIED. VERY DANGEROUS”

“WHEN DRIVING AT SPEEDS OF 38 MPH OR MORE AND TURNING THE STEERING WHEEL/TIRES, THE VSC WARNING ALARM WILL GO OFF. WHEN THIS HAPPENS, THE CARS AUTOMATICALLY BRAKES. THIS HAPPENS WHEN THERE ARE NO PROBLEMS WITH THE DRIVING CONDITIONS. THE SEVERITY OF THE BRAKING AND LENGTH OF ALARM VARY. IT IS ESPECIALLY PROBLEMATIC ON TIGHT TURNS. IT DOES NOT MATTER WHETHER YOU ARE GOING UPHILL, DOWNHILL, OR TURNING ON A FLAT ROAD. WE DO NOT KNOW WHAT IS CAUSING THIS UNSAFE ISSUE. WE HAVE TRIED TURNING OFF THE TRAC. IT MADE NO DIFFERENCE.”

“TL* THE CONTACT OWNED A 2006 TOYOTA SIENNA. WHEN THE BRAKE PEDAL WAS DEPRESSED, THE VEHICLE INDEPENDENTLY ACCELERATED TOWARDS AN INTERSECTION. AS A RESULT, THE CONTACT CRASHED INTO TWO OTHER VEHICLES. THE CONTACT'S VEHICLE CAME TO A STOP WHEN IT CRASHED INTO A POLE. THE CONTACT SUFFERED INJURIES TO THE BACK, NECK, SHOULDER, CHEST, KNEES, AND HIPS. THE PASSENGER SUFFERED INJURIES TO THE SHOULDER AND STOMACH. MEDICAL ATTENTION WAS RECEIVED. HUNTINGTON BEACH POLICE WAS AT THE SCENE AND FILED REPORT NUMBER: [XXX]. THE VEHICLE WAS TOWED. THE MANUFACTURER WAS CONTACTED AND PROVIDED CASE NUMBER: [XXX]. THE CONTACT ALSO STATED THAT THE MANUFACTURER'S ENGINEER WOULD INSPECT THE VEHICLE TO DETERMINE THE CAUSE OF THE FAILURE. THE VEHICLE WAS DESTROYED. THE APPROXIMATE FAILURE MILEAGE WAS 112,297.*PM ('PARTS OF THIS DOCUMENT HAVE BEEN REDACTED TO PROTECT PERSONALLY IDENTIFIABLE INFORMATION PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).')*JB”