On certain vehicles, a software problem with the hybrid vehicle electronic control unit (ECU) could cause the hybrid system to turn off if the shifter position is changed while driving. This could result in a loss of power to the wheels.
Safety Risk
A loss of power to the wheels could increase the risk of a crash.
Corrective Actions
Toyota will notify owners by mail and instruct you to take your vehicle to a dealer to update the hybrid vehicle ECU software.