NHTSA Complaint #11578709 — 2017 CHEVROLET VOLT

On 2/11/23, our 2017 Chevrolet Volt displayed a check engine light and the engine started to overheat, as determined by the driver from the dash coolant temperate display, while driving down the interstate after 1 hour of driving. The car was pulled over to the side of the road and towed home. Upon inspection of the Chevy Volt later, the F03 15 amp mini-fuse(referred to as non-walk home fuse) in the main engine fuse block had blown, which had likely caused the electronically controlled thermostat to close and the engine to quickly overheat, due to lack of coolant. The reason why the F03 15 amp mini-fuse blew is because the control board for the EGR valve catastrophically failed and overloaded the fuse of this important shared electrical circuit. The electronic thermostat is part of this shared circuit, in addition to the EGR valve and possibly other important vehicle functions. I consider this cascade of electronic and engine/cooling failures to be a safety issue for the driver, in addition to being a poor design. As GM doesn't currently have any replacement EGR valves for our 2017 Chevy Volt, which includes the EGR valve control board, we are forced to disconnect the EGR valve from the vehicle and replace the F03 15 amp mini-fuse, in order to make the car drivable. This is contributing to increased vehicle emissions and reduced vehicle efficiency. In locations with emissions inspections, this EGR valve parts shortage results in the vehicle failing inspection and being made undrivable. I think the NHTSA should force GM to recall any 2nd generation Chevrolet Volt vehicles that have this defective EGR valve/control board, due to its cascading effect on the safe operation of the Volt.