NHTSA Complaint #11577188 — 2017 CHEVROLET VOLT

50 miles into a 500 mile trip, my Volt displayed a warning message, "propulsion power reduced." It operated almost normally for the first 250 miles and we were able to reach our destination, but the propulsion battery was not able to recharge from the engine power as efficiently as usual. An auto shop at the destination who does not specialize in EVs examined the car and found a fault in the engine control module, but the car was otherwise in drivable condition. On returning home, the car was required to climb a long steep hill. It gave the message "engine unavailable" on the freeway and began running on its battery reserves, which were barely enough to reach the nearest exit. If the car had run out of battery reserves where pulling over to stop would be unsafe, a dangerous situation would have resulted. The car had to be towed home. An EV specialist mechanic inspected the car and diagnosed a faulty EGR valve resulting in a short in the power to the engine control module. The car has been waiting at the mechanic for a new EGR valve for 5 months due to a nationwide parts shortage. Two months ago the request for the new EGR valve was escalated to a "STACK order" but I still have no updates on when the new part will actually be available. Online forums dedicated to the Volt have many posts about cars waiting for months for a new EGR valve. Two weeks ago, I contacted the Chevrolet parts concierge about the issue. They took down all my contact information and stated they would be in touch. Today after not hearing back from Chevrolet, I called the parts concierge again. The staff found no record of my previous call.