Overheating can damage electronic components, potentially causing the hybrid system to shut down while the vehicle is underway.
Toyota has issued a recall for Prius v hybrids from the 2012-2014 model years.
The current software programming can allow transistors to overheat in the motor/generator and hybrid control computers, potentially allowing the components to be permanently damaged. Drivers are warned via diagnostic lights and the system can enter a failsafe mode.
"In rare circumstances, the hybrid system might shut down while the vehicle is being driven, resulting in the loss of power and the vehicle coming to a stop," the company said in a statement.
Service technicians will reprogram both the motor/generator control ECU and the hybrid control ECU to resolve the issue and prevent damage to transistors.
The campaign affects approximately 109,000 vehicles sold in the US market.