NHTSA Complaint #10762155 — 2008 SCION XD

I WAS DRIVING AND ALL OF A SUDDEN THE CHECK ENGINE WOULD COME ON AND THE VEHICLE WOULD START SHAKING AND SLOW DOWN FOR MAYBE A COUPLE OF SECONDS THEN IT WOULD DRIVE NORMAL, SOMETIMES EITHER THE SAME DAY OR IN A COUPLE OF DAYS THE CHECK ENGINE LIGHT WOULD SHUT OFF AND VEHICLE WOULD DRIVE NORMAL AGAIN, THIS HAPPENED ABOUT 4/5 TIMES, I TOOK IT TO A MECHANIC, BUT WHEN I DID THE CHECK ENGINE WAS OFF AND HE FOUND NOTHING WRONG WITH IT, (NOT REALLY SURE IF HE EVEN DID A DIAGNOSTIC ON IT) HE STATED MAYBE IT WAS JUST A TEMPORARY GLICHE. THIS SUNDAY 9/6/2015, I WAS DRIVING, THE CHECK ENGINE CAME ON AND THE VEHICLE STARTED TO SHAKE BUT THIS TIME IT FELT IT WAS ABOUT TO STOP, THIS IS HAPPENING WHILE I WAS DRIVING IT WAS SCARY BECUASE A PERSON DRIVING BEHIND ME AT 40MPH DOES NOT KNOW THAT THE VEHICLE IN FRONT OF THEM MIGHT COME TO A FULL STOP AND THEY MAY CRASH INTO ME.. VERY SCARY.. LUCKILY THERE WAS NOT A LOT OF TRAFFICE BUT STILL IT WAS VERY SCARY. THIS TIME IT TOOK LONGER TO GET BACK TO A NORMAL SPEED I HAD TO CIRCLE AROUND, STOP THE CAR, HIT THE GAS A LITTLE TO SEE IF THAT WOULD HELP AND IT DID BUT I WAS ONLY 5 MINUTES AWAY FROM MY HOME. THIS IS VERY SCARY ESPECIALLY IF YOUR DRIVING IN A FREEWAY OR IN A BUSY STREET. I WANT TO KNOW IS THIS A TOYOTA SCION PROBLEM AND IS THIS HAPPENING TO OTHER SCION XD 2008 DRIVERS AND WHAT'S CAUSING THIS?