2005 Toyota Sienna Electronic Stability Control Esc Service Brakes Engine Problems

THE TRACTION CONTROL SYSTEM IS ACTIVATING IMPROPERLY. THE VEHICLE'S ANTI-SLIP INDICATOR WARNING LIGHT ILLUMINATES; AN ALARM SOUNDS; THE ABS SYSTEM ACTIVATES; AND THE VEHICLE SOMETIMES LOSES POWER. THIS HAPPENS ON DRY ROADS, MOST COMMONLY EITHER GOING DOWNHILL OR ELSE ON A CURVE, EVEN A MILD ONE. THIS HAPPENS ABOVE 20 MPH. WHEN IT HAPPENS, THE COMBINATION OF ALERTS AND SENSATIONS ARE VERY STARTLING TO THE DRIVER, CREATING A DANGEROUS SITUATION. IT HAS OCCURRED WHILE TRYING TO ACCELERATE TO MERGE ONTO A HIGHWAY. THIS WAS EXCEPTIONALLY DANGEROUS AS THE VEHICLE BEGAN LOSING POWER AND VEHICLES BEHIND US ALMOST HIT US FROM BEHIND AS WE WERE SLOWING INSTEAD OF INCREASING SPEED. FROM MY INTERNET SEARCHES (INCLUDING NHTSA COMPLAINTS), THIS APPEARS TO BE A RECURRING ISSUE WITH THIS MAKE/MODEL/YEAR RANGE. THIS HAS BEEN HAPPENING FOR THE PAST 3 MONTHS. OUR VEHICLE HAS APPROXIMATELY 135,000 MILES ON THE ODOMETER.