2017 Chevrolet Volt engine problems

“The contact owns a 2017 Chevrolet Volt. The contact stated that while driving at an undisclosed speed, the vehicle suddenly lost power. The check engine warning light illuminated, and the message "Propulsion Power Reduced" was displayed. The manufacturer was notified of the failure. The failure mileage was 124,000.”

“I am reporting a suspected Battery Energy Control Module (BECM) failure in my 2017 Chevrolet Volt. My vehicle has experienced multiple symptoms consistent with the known BECM defect documented by General Motors, including intermittent failure to start, reduced propulsion power, and failure to operate on electric power despite the high-voltage battery being fully charged. When the vehicle did start, it would run using the gasoline engine instead of the fully charged battery. The vehicle also experienced reduced propulsion power, limiting acceleration and creating a serious safety concern, particularly when merging into traffic, crossing intersections, or driving at highway speeds. The intermittent starting failures also create a risk of becoming stranded. My vehicle has generated multiple diagnostic trouble codes associated with these malfunctions, which are available for review. These symptoms are consistent with those identified in GM Technical Service Bulletin 18-NA-261 and Special Coverage Program N232432680. GM established extended BECM warranty coverage of 15 years or 150,000 miles for eligible 2016–2018 Chevrolet Volts. However, despite my vehicle being a…”

“3rd failure of EGR valve (GM part 12691147, superseded by 19436521) on this vehicle. 10/10/2019 at 11,336 mi: Check Engine Light and Driver Information Center displayed "Loss of Propulsion" message; EGR valve diagnosed as cause and replaced by dealer under warranty at no cost. 11/2023 at approx. 30,000 mi: EGR valve failed again; dealer stated OEM part was no longer available from manufacturer due to supply shortage and installed a third-party replacement part; repair not covered, paid out of pocket. 8/26/2026 at 49,864 mi: EGR valve failed a third time; a used, refurbished part was sourced due to continued unavailability of a reliable new OEM part, with repair scheduled for 9/14/2026, again paid out of pocket. This is a known, recurring failure on 2016-2019 Chevrolet Volts, referenced in GM Technical Service Bulletin 19-NA-206. The failure does not present only as an emissions fault — it triggers a "Loss of Propulsion" driver warning, indicating a direct impact on the vehicle's ability to be safely driven. Sustained unavailability of the OEM part is forcing owners toward third-party or used/refurbished parts of unknown long-term reliability, at repeated cost…”

“Received "reduced propulsion" message, with no engine detected. Car slowed to a near stop while driving on the Interstate highway. Very dangerous to have that suddenly happen. Message popped up randomly with no prior warning.”

“Brought car into Chevrolet dealership for intermittent “miss” when driving. Dealer diagnosed it needed an EGR valve replaced at a cost of around $4,000.00 which is a significant portion of the cars value.”

“The contact owns a 2017 Chevrolet Volt. The contact stated that while driving at an undisclosed speed or while starting the vehicle, the check engine warning light was unexpectedly illuminated. Additionally, there were several error codes provided through the Mobile App for engine-related failures. The dealer was contacted; however, the vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure and referred the contact to the NHTSA Hotline for assistance. The approximate failure mileage was 92,000.”