Toyota Prius not starting due to power loss and unrepaired sensors on Toyota Prius

Some Toyota Prius owners report experiencing starting issues due to power loss and unrepaired sensors. These problems can stem from a dead 12-volt battery, which is crucial for powering the vehicle's electrical systems, or a dead high voltage battery that hinders normal starting operations. Additionally, faulty alternators or parasitic battery drains may prematurely deplete the battery, leading to further starting difficulties. Sensor-related issues, such as debris in the mass air flow sensor, can cause stalling or a complete loss of power, resulting in a no-start condition. Furthermore, a malfunctioning key fob or immobilizer system can prevent the Prius from responding when the start button is pressed. To mitigate these issues, owners are advised to check battery connections, replace drained key fob batteries, and have their batteries inspected by a qualified mechanic to ensure reliable starting.