2014 Chevrolet Volt Hybrid Propulsion System Problems

Your Volt's hybrid propulsion system may unexpectedly lose power while driving, causing the engine to rev without responding to the accelerator and the car to slow down on its own. A "Propulsion Power Reduced" warning message appears, and the issue may happen repeatedly at various speeds before normal operation returns. The dealer couldn't reproduce the problem during service visits, so no repair was completed. Fixing this may require diagnostic scanning of the hybrid system's control modules and possible replacement of affected sensors or electrical components.