The repair involves installing a steel shim a couple of millimeters thick in the pedal assembly, behind the top of the gas pedal, to eliminate the excess friction between two pieces of the accelerator mechanism. In rare cases, Toyota says, that friction can cause the pedal to become stuck in the depressed position.
Toyota has fix for gas pedals; repairs this week - Yahoo! Finance
Toyota has fix for gas pedals; repairs this week - Yahoo! Finance