NHTSA Complaint #10408627 — 2010 TOYOTA PRIUS

SECOND OCCURRENCE OF THIS PROBLEM IN THREE WEEKS. DRIVING DOWNHILL ON A RESIDENTIAL STREET AT 25 MPH, SLOWING TO A STOP WITHOUT APPLYING THE ACCELERATOR. SUDDENLY LOST ENGINE POWER. APPLIED ACCELERATOR, NO RESPONSE. CONTINUED TO LOSE SPEED AS I ROLLED SILENTLY DOWNHILL TOWARD THE INTERSECTION. APPLIED BRAKES AND STOPPED. RESTARTED THE ENGINE AND IT STARTED UP FINE. THE PREVIOUS INCIDENT ALSO OCCURRED ON A DOWNHILL GRADE, ON AN EXIT RAMP FROM AN PARKING GARAGE. FORTUNATELY BOTH INCIDENTS HAPPENED AT LOW SPEED AND NOT IN HEAVY TRAFFIC. I PREVIOUSLY REPORTED THE FIRST INCIDENT. TOYOTA DEALER CHECKED VEHICLE AFTER EACH INCIDENT AND COULD NOT REPLICATE THE INCIDENT OR FIND A COMPUTER CODE THAT WOULD EXPLAIN IT. SINCE THIS WAS THE SECOND OCCURRENCE AND WAS FAMILIAR TO ME, AND SINCE I WAS NOT IN TRAFFIC, I LET IT HAPPEN WHILE OBSERVING MY OWN ACTIONS, TRYING TO CHECK FOR DRIVER ERROR. MY FOOT WAS NOT ON THE BRAKE.THE CAR WAS IN DRIVE. WHILE THE CAR WAS SLOWING, I TRIED PRESSING THE ACCELERATOR DEEPLY AND THEN PUMPING THE ACCELERATOR TO SEE WHAT WOULD HAPPEN.. THERE WAS NO RESPONSE, AND NO SOUND. THE SAME WAS TRUE THREE WEEKS AGO-NO RESPONSE TO PUSHING THE ACCELERATOR, EVEN DEEPLY, AND NO SOUND. THREE WEEKS AGO, THE FIRST TIME IT HAPPENED, I ALSO TRIED CYCLING THROUGH THE "MODES" (EV, PRIUS, ECO, POWER) WITH NO EFFECT. EACH TIME, I HIT THE POWER BUTTON TO POWER OFF, AND THEN I HIT IT AGAIN TO RESTART. POWERING OFF AND THEN RESTARTING, BOTH TIMES, SEEMED LIKE "REBOOTING" A COMPUTER. FORTUNATELY TRAFFIC CONDITIONS BOTH TIMES GAVE ME AMPLE TIME TO REBOOT. WILL THIS HAPPEN AGAIN? *TR