-- My 2017 Chevrolet Volt experienced a failure of the Battery Energy Control Module (BECM) in the powertrain system. This failure prevented my vehicle from being driven. The BECM and related battery pack components were replaced under warranty by a Chevrolet dealership. Those parts, to my knowledge, are not available for inspection. -- From a safety perspective, my vehicle was luckily parked when the failure occurred. Many Volt owners have reported -- via online Volt forums and on Reddit at r/volt -- that the failure has occurred while the vehicle is in motion, resulting in a safety issue when the vehicle loses power and stops in the middle of a street or highway. -- A Chevrolet dealership confirmed my vehicle's BECM failure through diagnosis and code reading (see attached documentation). In my case, the BECM initially failed and I lost the ability to drive my vehicle when it was stopped in a parking lot (while I was on vacation, 225 miles from my home). I left the dead vehicle in the parking lot overnight. The next day I was able to start the vehicle and drive it to the nearest EV-certified Chevrolet dealership, where the BECM permanently failed in the dealership's service entrance. I watched the dealership service staff push the dead vehicle into the service bay. It should be noted that I was lucky -- the replacement BECM part was available from GM to the dealership in two days. NHTSA will receive complaints from other Volt owners who waited weeks and MONTHS for a replacement part and repair, all the while their vehicle could not be driven. -- My vehicle's BECM was inspected, the failure diagnosed, and the part replaced by a Chevrolet technician at a Chevrolet dealership (see attached documentation). -- The BECM failure on my vehicle happened immediately with no warning. When I could not drive my vehicle, I saw cryptic "propulsion lost" and "shift transmission to park" error messages on the instrument panel.

- Bemidji, MN, USA

BECM failure, covered by warranty but required towing that I had to pay out of pocket. Have been waiting a week for the repair to be completed and the dealer is refusing to provide a loaner vehicle.

- York, PA, USA

The vehicle stopped operating on the highway suddenly and without warning and would not restart. I had it towed to the Chevrolet dealer. They determined power train parts were required which were backordered. They are unclear on which parts. The car has been at the dealer for 2 months waiting for parts. They have no estimate on when they will have the parts. I am concerned about the reliability issue and also that they don't have the parts to fix it for months on end.

- Mountaintop, PA, USA

BECM issues causing vehicle to lose power, not go in to park, will not remote start, battery failure, and not turning on or not turning off when prompted.

- Carson City, NV, USA

Random no starts, engine turns on at random, won-??t charge, car jerks, hesitation while driving, hard to climb mountain roads, Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 1-12

- Bakersfield, CA, USA

The shifter of the car will NOT go into park! It takes forever. Have to shut it off, start it back up, and keep trying to get it to work. It's insane! This has to be recalled. Literally thousands of people are having this exact same problem. It's all over the internet. And I wouldn't mind if it were a simple $50 repair, but this is a $500 to $600 thing to fix and it's just not right. The gear shift cable is not long enough. Chevy knows this because they've manufactured a cable extension that needs to be installed. What does that tell you? Manufacturers defect! Please recall these vehicles for this problem and get them to repair their factory mistake. Thank you. Sincerely & Respectfully, [XXX]. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Webster, MA, USA

My Chevrolet Volt at 66, XXX miles had a battery energy control module (BECM). We bought the vehicle used three months ago from a dealer, but are just now seeing that the BECM is a very common complaint for Chevrolet Volts. This issue leaves the driver stranded and the vehicle bricked without the unit being able to be moved as it cannot be moved into neutral in order to be moved to safety.

- Farmington, MN, USA

The contact owns a 2017 Chevrolet Volt. The contact stated that while parked, the transmission was shifted into reverse (R); however, the vehicle failed to reverse. Additionally, the contact stated that while the transmission was shifted into drive (D) the vehicle failed to move. The check engine warning light was illuminated. The vehicle was taken to a dealer, who informed the contact that the body control module (BCM) needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 115,000.

- Louisville, KY, USA

The vehicle suddenly, and unexpectedly lost propulsion while driving. The vehicle is no longer able to turn on or drive. I contacted several Chevy official dealers and took the car in for repair. They said it is a problem with the hybrid battery system. But the car is no longer manufactured and parts are no longer available. So I am now stuck with a car that is non-operational and not repairable.

- Los Angeles, CA, USA

When attempting to turn off the vehicle, an error message "action required - shift to park" appears even though the shifter is in the park position.

- Lubbock , TX, USA

Battery Energy Control Module failed. Car stopped unexpectedly while driving which was a huge safety issue. Car has been broken for 3 months waiting for parts which seem to be unavailable.

- Auburn, MA, USA

I pull into a parking space. Place the gear in Park and then attempt to turn the car off by pressing the Power button. I then receive a warning message informing me: Action Required Shift Car to Park The car gear is already in Park and the driver display console also shows the car is in -??P-?? (Park). The car will not lock. I have to turn the car on and off and switch the gear back and forth placing back into P (Park) several times until the car realizes it-??s in Park and allows me to turn it off. This started happening when the car hit about 36,000. The car has approximately 40,000 miles now.

- Tallahassee, FL, USA

I have owned my 2017 Volt since November of 2016. I drive about 200 miles a week and currently my mileage is at 109,000 (9,000 miles PAST the warranty period). My car did not start one morning and had to have it towed to my local GM dealership. They diagnosed it with a bad BECM and a repair bill of $1,400. They have no estimated time on when the part will be shipped. It is unacceptable to not have an ETA for a critical part or the vehicle. I have read on many forums that the BECM is a known failure for the 2017 Volt.

- Eau Claire, WI, USA

Our car would not start. Took to dealer for repair. They changed 12 volt baterie and a fuse. Next couple days later same problem. No start or baterie. Took back to the dealer they diagnosed a bad becm battery electric control module. They have had it for 2 weeks with no estimate on when the part will be available. I understand it is common failure on volt cars.

- Rigby , ID, USA

Vehicle went to low propulsion mode and would not move at a stop light during rush hour traffic. After many trial and errors restarting the car it finally moved under low propulsion mode. We were almost hit from behind many times because of people at the last minute turning around a stalled car... GM diagnosed the issue as a bad BECM (battery energy control module). Our service rep said it is a very common issue with this car and that they have a few others waiting for a replacement part. I am at month 2 waiting for my vehicle to get fixed.

- Plymouth, MN, USA

Driving and check engine appeared. Vehicle hybrid power train acted erratically, switching into and out of limp mode. Potential loss of control without any previous warning signs. Diagnosed with a failure of Battery Energy Control Module 24296900. Multiple complaints of the same issue from other owners. 5 other same model cars at dealership waiting for the same part. Estimated arrival is 8-12 weeks. This has been a well documented problem since 2018, and Chevrolet has released a TSB acknowledging the issue, and potentially loss of control and stranding.

- Milliken , CO, USA

I will get a "shift to park" message on the dash when parking the car and trying to turn it off. When it happens, the car will not turn off and claims it is not in park. The shifter is physically in the park position, but the car does not recognize it. I have to shift it in and out of park multiple times to get it to recognize that it is in park. On a few occasions, I have had to leave it on and lock the doors because it just would not recognize that the car was in park.

- Highland, IN, USA

The vehicle stopped on its own without obstacles. The vehicle fails to stop under adaptive cruse control and you have to disengage to stop or it will hit the car in front. When stepping on break during adaptive cruse it lurching forward before breaking takes over causing a hazzard. When you shif to park it doesn't register and will kill battery. Adaptive cruse does not keep it centered in clearly marked lanes.

- Dartmouth, MA, USA

from all my reading and my own knowledge and what I have read on forums from others who have had the same issue, this problem is due to the cars BECM (battery energy control module) going bad unexpectedly. apparently this has happened to many other people driving the generation 2 Chevy volt at varying mileages. On the highway on her way home from work, my wife experienced a large loss of power and the car started shuddering and switching between the electric and gas powertrain as well as slowing down quite a bit. the dash showed a notification of "propulsion power reduced". the car also lost power to many of its accessories. she ended up having to pull over on the side of a busy highway and turn the car on and off again till it would finally work and managed to limp it home along back roads. if she had not had a shoulder to pull on to she would have been stuck in the middle of the highway. the car had absolutely zero issues before this, but since the incident has had a check engine light illuminated and is unable to charge unless the codes are reset. it is drivable again after getting some codes cleared but as it poses a serious hazard we are trying to find a temporary car till we can get this fixed. our car has about 100900 miles on it, but these failures happen as soon as 25k-50k on a lot of vehicles. it has not been inspected by anyone yet as it happened yesterday.

- Lakeport, CA, USA

2016-2018 Volts are have a hung issues with the Battery Engine Control Module (BECM). When it fails, the car stops driving and will shift itself to park. Mine lucky failed when I was stopped but the car is unable to move when it fails. It will not drive on the motor or the battery.

- Corpus Christi, TX, USA