NHTSA Complaint #10689798 — 2011 TOYOTA SIENNA

HELLO, I OWN A 2011 SIENNA LE V6. IN COLD WEATHER, IT HAS A PROBLEM WHEN BREAKING WHERE THE VEHICLE LURCHES FORWARD AS IT COMES TO A STOP (A SIGNIFICANT INCREASE IN RPM IS SEEN JUST AS THE VEHICLE IS ABOUT TO STOP). SO MUCH SO THAT IT SEEMS AS THOUGH IT'S GIVING ITSELF GAS (INCREASED RPM) AND DRIVING ITSELF, CREATING A HAZARD. I CAN LITERALLY TAKE MY FOOT OFF THE BRAKE PEDAL AND THE VAN WILL INCREASE IT'S SPEED TO ABOUT 35MPH WITH NO INPUT FROM ME IN REGARDS TO THE GAS PEDAL. AFTER WARMING UP, THE PROBLEM DOES TEND TO FADE AWAY. BUT THE WARMUP PERIOD, ESPECIALLY ON COLD NORTHEAST DAYS, COULD TAKE AS LONG AS 20 MINS. AND 8 MILES OF CITY DRIVING TO OCCUR (AND THIS IS AFTER A 5 MIN. PARKED IDLE WARMUP PERIOD), AND EVEN THEN, THE VAN STILL EXHIBITS THIS REVVING ISSUE SOMEWHAT, JUST NOT AS SIGNIFICANT AS WHEN IT'S IN THE WARMUP STAGE. ON MY FIRST COMPLAINT LAST WINTER, THE DEALER CHANGED OUT THE THERMOSTAT AND CONSIDERED THE PROBLEM FIXED. HOWEVER, THE VAN CONTINUES TO SHOW THE SAME PROBLEM THIS WINTER. AS YOU CAN SEE ON THIS INTERNET THREAD, MANY OTHER OWNERS HAVE THE SAME ISSUE. HTTP://WWW.SIENNACHAT.COM/FORUM/193-PROBLEMS-MAINTENANCE-REPAIR/158410-ENGINE-REVVING-UP-JUST-BEFORE-STOP.HTML THIS ISSUE IS NOT JUST ANNOYING, I BELIEVE IT IS A SAFETY ISSUE, PARTICULARLY ON SLIPPERY SURFACES SUCH AS SNOW AND ICE WHICH ARE LIKELY TO OCCUR IN THE COLDER WEATHER THAT PRECIPITATES THIS ISSUE. I BELIEVE EITHER THE ENGINE OR TRANSMISSION PROGRAMMING NEEDS TO BE MODIFIED TO ADDRESS THIS ISSUE AS SOON AS POSSIBLE. *TR