I HAVE EXPERIENCED A SURGE WHERE THE CAR WILL MOVE WITH YOUR FOOT ON OR OFF THE BRAKE WHILE SITTING STILL. THIS PROBLEM OCCURS WHENEVER I HAVE THE A/C ON OR WHEN I AM TURNING THE STEERING WHEEL. THE PROBLEM IS MORE SERIOUS WHEN I AM BACKING INTO MY GARAGE AND THE CAR SURGES BACKWARD WHICH ALMOST CAUSES ME TO HIT THE BACK WALL OF MY GARAGE. THE MOST SERIOUS INCIDENT OCCURRED WHEN THE CAR STARTED SURGING WHILE I WAS BACKING UP AT WORK AND THE CAR HIT THE BUILDING. THERE WAS MINOR DAMAGE BUT COULD HAVE BEEN SERIOUS IF MY FOOT WAS NOT ALREADY COVERING THE BRAKE. I CALLED THE DEALERSHIP AND TOOK THE CAR IN. THEY DIAGNOSED THE CAR HAD A BAD MASS AIR FLOW SENSOR WITH A CODE OF (P061B) AND (P2106) THEY ALSO DIAGNOSED THAT THE THROTTLE BODY WAS EXTREMELY CARBONED UP AND SUGGESTED THE THROTTLE BUTTERFLY WAS NOT MOVING FREELY DUE TO THE CARBON. I PAID TO HAVE IT CLEANED AND THEY SUGGESTED THAT THE THROTTLE BODY MAY NEED REPLACEMENT IN THE FUTURE.