The contact owns a 2017 chevrolet volt. The contact stated while driving approximately 30 mph, the message "low propulsion" was displayed. The vehicle was taken to the dealer and was repaired. The contact stated that the failure recurred, and the vehicle shuddered while the accelerator pedal was depressed. The contact stated that the vehicle lost motive power and failed to accelerate above 5 mph. The vehicle was restarted; however, the vehicle failed to exceed 30 mph. The vehicle was taken to the same dealer where it was diagnosed with an egr valve coolant failure; however, the part was not yet available. The vehicle was not repaired. The manufacturer was made aware of the failure and a case was opened. The failure mileage was approximately 60,000. The vin was not available.