2008 Toyota Sienna

I have had the traction control go on while driving on the highway even when I turn it off. Sometimes the VSC and TRAC OFF lights go on while driving. The roads are dry. Whenever I take it in to the mechanic, all the lights are off. They pulled a zero calibration code and recalibrated. It still kept happening. Then I was driving around a curve on highway speeds when the traction control light went on and the van suddenly braked on its own and I almost lost control. The tires are new and the roads were dry.

Issues with VSC. The sensor alarm goes off when driving at more than 50 mph and slightly turning the steering wheel. The car brakes itself and this is DANGEROUS. It happens all the time, it has been more than 5-6 years and we are to the point of not using the car on the freeway to prevent a potential fatal accident. I found posts describing the same issue with this model of Toyota. Car should be recalled to get this fixed.

2008 Toyota Sienna. Driving down steep right turns, VSC light comes on, urgent beeping alarm and tires grip and grip vehicle brakes going 20-30+ mph on dry road. Very scary and dangerous, and has continues repeatedly over the past year on curvy right turns. Local mechanics don't know what is wrong with the vehicle. Many Sienna owners have similar problems listed on Carguru. https://www.cargurus.com/Cars/Discussion-c9152_ds656326 Please insist on a manufacturing recall for this vehicle. It is unsafe and could easily cause an accident. Thank you. Concerned original car owner.

THE VEHICLE STABILITY CONTROL WILL UNEXPECTEDLY ENGAGE IN INSTANCES WHERE IT SHOULDN'T ACTIVATE. THE MOST COMMON IS A LONG, SLIGHT CURVE ON AT FREEWAY SPEEDS ON DRY PAVEMENT. THE SECOND MOST COMMON SCENARIO IS ACCELERATING TO ENTER THE FREEWAY. WHEN VSC ENGAGES, THE VEHICLE WILL LURCH TO THE SIDE IT WAS ACTIVATED ON AND CURTAIL ANY ACCELERATION. THIS MAKES THE VEHICLE HARD TO CONTROL WHEN ON A FREEWAY CURVE AND WHEN ATTEMPTING TO ACCELERATE TO MERGE ONTO THE FREEWAY, CAUSING UNEXPECTED MOTION THAT IS A HAZARD TO REMAINING ON THE ROAD OR CAUSING THE VEHICLE TO BE IN AN ACCIDENT WITH OTHER VEHICLES. THERE IS NO INDICATION THAT THERE ARE MALFUNCTIONS IN ANY SYSTEM THAT WOULD CAUSE THIS TO OCCUR. NOTE: MILEAGE ON THE ODOMETER IS ~170,000 MILES.

ABOUT A FIVE YEARS AGO THE SLIP INDICATOR LIGHT (CAR WITH SWERVY LINES) STARTED COMING ON INTERMITTENTLY WHILE TURNING ON HIGHWAYS ETC. (BUT NOT WHEN ANY RISK OF TIRES SLIPPING). I BROUGHT IT TO TOYOTA THREE DIFFERENT TIMES OVER THE YEARS AND TOYOTA ALWAYS STATES THEY CAN NOT DUPLICATE ISSUE AND STATES THEY CAN?T FIX IT BUT MAYBE DRIVE SLOWER (REALLY IT HAS NOTHING TO WITH MY SPEED AFTER YEARS OF DEALING WITH THIS ITS BEEN SOMETHING WE JUST DEAL WITH). THE VSC LIGHT ALSO COMES ON AND ALARM SOMETIMES SOUNDS WHILE DRIVING. TWO MORE TRIPS TO TOYOTA AND SEVERAL VISITS TO DIFFERENT MECHANICS AND NOBODY CAN FIND OUT THE PROBLEM. IN THE LAST 6 MONTHS THE ABS SYSTEM IS ALSO BEING ACTIVATED WITHOUT ME APPLYING THE BRAKES. IT DOES IT WITHOUT WARNING. ALL OF THESE ISSUES CAN BE ON A CURVE AT DIFFERENT SPEEDS OR ON A SLIGHT OR MEDIUM TURNS (NOT REAL SHARP TURNS), GOING UPHILL OR DOWNHILL AND LEFT OR RIGHT. OUR VAN HAS ABOUT 150,000 MILES ON IT NOW ON 2020 BUT WHEN THE PROBLEM FIRST STARTED IT ONLY HAD AROUND 110,000 MILES ON IT. WE HAVE CHANGED BRAKES, TIRES, ROTORS, BRUSHING ON ADVICE FROM DIFFERENT MECHANICS TO TRY TO FIX THE ISSUE. NOTHING WORKS. TOYOTA CANNOT FIGURE IT OUT. IT'S BECOMING MORE DANGEROUS BECAUSE NOW THE ABS IS BEING ACTIVATED WITH THIS PROBLEM. I CAN'T TELL IF MY BRAKE LIGHTS COME ON SO THAT DRIVERS BEHIND ME CAN TELL THAT I?M SLOWING DOWN VERY QUICKLY. THIS JERKS THOSE IN THE CAR AND I?M AFRAID WE MAY LOSE CONTROL. I HAVE READ ON DIFFERENT WEB SITES THAT THIS IS COMMON WITH A TOYOTA AND IT'S JUST NOT MY VAN. IF I HAD THE MONEY I WOULD BUY A DIFFERENT VEHICLE BUT BEING ON A FIXED INCOME I DON'T HAVE THE LUXURY TO DO SO. HOW CAN A CAR COMPANY HAVE SO MANY COMPLAINTS FROM CONSUMERS ABOUT THIS COMMON PROBLEM BUT STILL CAN'T TELL US HOW TO FIX IT? IT'S TOYOTAS DESIGN THEY SHOULD BE ABLE TO TELL THE CONSUMER WHAT IS CAUSING THIS ISSUE AND HOW TO FIX IT. *TR

THE TRACTION CONTROL, STABILITY, AND ABS ENGAGE IN TURNS (STEERING INPUT) RANGING FROM SPEEDS OF 25-55 MPH. IT HAPPENS ON FLAT SURFACES, INCLINES AND DECLINES. THE TURN RANGE FROM SHARP TURNS TO SLIGHT TURNS THAT THERE IS NO REDUCTION OF SPEED TO NAVIGATE THE TURN. WHEN IT OCCURS THE VEHICLE RAPIDLY DECELERATES AND PULLS TO THE RIGHT. WHEN TRYING TO ACCELERATE IN A TURN THE VEHICLE WILL NOT ACCELERATE UNTIL THERE IS NO STEERING INPUT. DEALERS AND MECHANICS CAN NOT DETERMINE THE CAUSE. IT HAS BEEN OCCURRING DAILY FOR ABOUT 6 MONTHS. THIS HAS CAUSED MANY NEAR CRASHES.