2018 Chevrolet Volt

Chevy Volt lost power while driving on the highway. No warning. The car has been at the dealership for 3.5 months and they have yet to tell me what the issue is, I have asked every time. Seems as though they don't want me to know. HIghly likely it is is BECM issue. Also, I scheduled the car to be looked at via their app, the day I arrived for the appointment no technician was available, and said I needed to reschedule and bring it back in a week. I just left the car there because it was incredibly unsafe.

Initially was receiving intermittent “Recieved Propulsion Power” warning and no check engine light. Did it about every 2 weeks but became worse. Received Reduced Propulsion power warning on a road trip from East TN to Charlotte then showed a check engine light. I continued to Charlotte I had 4 miles left on battery and was running on gas engine when “Engine Not Available” warning came on leaving me with a nearly dead battery for propulsion. Fortunately, there was a very nearby GM dealership in Charlotte which I was able to drop off and flew out of town for the week. I was told by the dealership that it was an O2 sensor and they had replaced it. Picked up the car the next week. I began the 3 hour trip back to East TN and about 30 miles into the trip I received the Reduced Propulsion Power AND Engine Not Available. I had about 10 miles left on the battery so I stopped and stayed at a hotel with a car charger overnight. Resumed trip home that am, but same code was displayed and engine would not come on. Rented a uhaul w/trailer and towed it home. Dropped it off at Champion Chevrolet in Johnson City and they diagnosed it as a faulty EGR valve. I learned that the part has been back ordered and looking at web forums I see people have described the same problem and they have been waiting many months for an EGR to be available. So, nature of complaint is: I got lucky in that I did not get stranded. Fortunately I was in the right place at the right time. I could have easily totally lost propulsion were my battery were fail and don’t know if I could have gotten off the roadway.

On Dec 3, 2023 I got the message "Propulsion Power is Reduced" and the gas engine started even though there was about 53 miles left in the battery. I was able to continue on to my destination use the gas engine. On Dec 8, 2023 I drove the car to La Quinta Chevrolet and they diagnosed the problem as a failed BECM (Battery Energy Control Module). On Dec 11 I got the car back and was told the BECM is on backorder and there is no estimated delivery date. Also on 12/3 when I tried to start the car after getting it home I started getting the message "Shift to Park" The dealer was able to fix this before I got it back on 12/11. I've been told I don't qualify for a loaner vehicle so I am left with a car that could stop at any time.

Vehicle is 2018 Chevrolet volt with approx 91000 miles, purchased new in California with both PZEV and Voltec warranties in place. Vehicle produced MIL in December, in Colorado, with exterior temperatures ~30 degrees, after attempting to remote start. The resulting OnStar Codes P1AEE, P1AEF, and P0AC4 indicating "the electric propulsion system is not performing as expected. Please service immediately." Drove the vehicle to the nearest dealership assuming there could be an unexpected loss of power. Identified PIC6285B as trouble shooting aid for the dealership. The dealership stated they contacted their GM TAC representative and the service foreman and TAC agreed the vehicle needed a transmission flush. No indication that the work would be covered by the bulletin found. Customer contacted Chevrolet EV advisor and confirmed vehicle did not qualify for any warranty as the diagnostics indicated a category 4 issue associated with the bulletin but the repairs required were a transmission flush. This was contrary to the published bulletin, other customer reports, as well as the specific DTCs expected. Customer believes diagnostics would be covered by bulletin or warranty given a repair was identified based on the trouble codes that were pulled. Dealership and GM did not agree with customers belief. Customer forced to pay in order to recover vehicle after 1 week.

In August 2023, while driving on I-93 in Boston, car switched from Battery Mode to Engine Mode, and Driver Information Screen reported "Reduced Propulsion". Propulsion Battery charge and gasoline fuel levels were adequate such that this should not have happened. In this Reduced Propulsion state the environmental systems, i.e. Heat/Defrost/AC, become inoperative. A thunder storm overhead was pouring cold rainwater on the windshield and it became fogged inside from condensation. Because windshield Defrost was not functioning my passenger and I had no recourse but to frantically grab whatever we could to wipe away the condensation and keep some small amount of road visibility. This problem is intermittent. Car is available for inspection upon request. Reduced visibility in a moving vehicle is a safety hazard to the driver and all those in their vicinity. A dealer or service center has not been alerted. The vehicle has not been inspected for this problem. The intermittent problem of vehicle entering "Reduced Propulsion" Mode first occurred in July of 2023. I have an On Board Diagnostic (OBD) reader that always reports Diagnostic Trouble Code (DTC) P1E00 when the problem occurs.

My 2018 Cheverolet Volt stopped charging via the PHEV port, the check engine light came on, and "Propulsion Power Is Reduced" read on the driver display. Car acceleration began to lag and I called the dealership service department immediately. I took it to the service dept and they said the repair is under warranty but the part is back-ordered with no ETA on when I will get my car back, but I should keep it there to prevent from getting stranded. They will provide no loaner car. It is currently at the dealership and I have no transportation. This appears to be a BECM issue.

The vehicle failed to restart after being parked in a garage all day while at work. On board diagnostics returned multiple codes concerning the EV battery and vehicle integrated control module. Specific descriptions include: The Lithium-Ion Battery is not performing as expected. An issue has been detected in the Onboard Charging System which manages your vehicles battery pack charge level; Vehicle network communication code. The network provides a communications link between systems inside the vehicle and when the network is disrupted a code can be set. If vehicle functionality is impacted please seek service soon. Dealership indicates the Battery Module needs replacing and part is back-ordered with unknown delivery time. There had been no warning or other diagnostic codes visible prior to the failure.

Driving down interstate when the following error came up on the console: ACTION REQUIRED: SHIFT VEHICLE INTO PARK Coasted to a stop in the middle of a homeless encampment under the freeway. I was in fear of my life due to the failure of the vehicle. Vehicle taken to Rydell Chevrolet 18600 Devonshire St, Los Angeles, CA 91324. Told the Power Inverter Module had failed. Parts unavailable.

BECM (Battery Energy Control Module) failed. Initially received check engine light, reduced propulsion power, and battery not available warnings but was able to drive via the internal combustion engine. Within 24 hours, car was completely dead in my driveway and would not drive at all on either propulsion system. Ended up having to have it towed to the dealership where the faulty BECM was diagnosed and replaced under warranty.