BECM failure on car confirmed at 128,000 miles. While driving the car's check engine light came on; immediately followed by a message of reduced propulsion and the EV range dropping to 0. Vehicle switched to gas and ran very rough for a short distance to an available stop. Have been informed by dealership that the vehicle is now unsafe for driving due to a potential stall.

- Newberry, SC, USA

My vehicle shut down in the middle of the road. GM diagnosed it as a faulty BECM.

- Aliso Viejo, CA, USA

same issue as PE23022 and TSB 18-NA-261 Called 51 parts wharehouses and Chevy dealers to locate part. They all report the same: part is not available and no idea when it will be come available. vehicle is not mobile without working part. Vehicle has lost propulsion while driving. Twice I was lucky no one was behind or on the side of me that I could pull off to the side of the road or a parking lot.

- Tyler, TX, USA

1 month ago was driving on toll and Population power is reduced came on, vehicle was reaving high and felt like power was being reduced/speed, was going 70 and had to immediately decrease speed and get off toll and found closest Chevy shop. Looked at dash and vehicle should have had at least 10 energy miles but it had immediately dropped down to 0. Before taking to Chevy, I had a quick inspection done by a Valvoline shop and they told me the battery had to be replaced. Carvana (Silverrock) warranty refused to do the repair under their coverages as -??batteries were not covered under warranty-?? Had it towed from Valvoline to Chevy. Found out Chevy battery was under warranty so it was taken there. Vehicle was checked in and didn-??t have an eta as hybrid battery was on back order with no ETA. 3 weeks later the part was received and it was a control module not a battery as the -??battery was not failing at the time-??. Service called and said vehicle was ready for pick up. Had vehicle for 1 week and was at work starting it up and after 9 hours sitting started it up and low population came back on and vehicle started idling higher than before then after a minute looked at back of car and a large cloud of while smoke started forming from back of vehicle. Immediately turned off car and called gmc roadside assistance to have vehicle towed to another dealership where is it sitting again for diagnosis with no eta.

- Frisco, TX, USA

Car won't start show codes U2622, U2621, U2620, U2619, P0AFA.

- Pharr, TX, USA

While driving in 60 degree weather, the vehicle-??s check engine light lit on the dash and the vehicle abruptly stopped. I was able to push the vehicle safely in heavy traffic. I contacted Onstar who gave me the vehicle diagnosis. Onstar advised the following codes appeared POACA (Hybrid/ electric vehicle powertrain control module requested malfunction indicator lamp illumination), P1AEE ( the electric propulsion system is not performing as expected. Please service immediately), and P1AEF (the electric propulsion system is not performing as expected).

- Granada Hills, CA, USA

Car stopped operation while out doing errands. Car had to be parked and restarted and made it back home. Car would not start again. Had to have it towed to dealership, BECM needs replaced for $2000. Warranty should cover, but part is backordered. Not sure when it will be fixed and with the recent freezing temperatures could have been dangerous.

- Perrysburg, OH, USA

Vehicle stopped running, will not restart. ODB codes show failure of the BECM. Check engine light illuminated, READY indication turned off. Vehicle does not display battery or fuel status. We were left stranded by this failure.

- Honoka'a, HI, USA

While driving the car in electric mode, a chime came on and flashed 'propulsion power is reduced', then it went into engine mode and the car decelerated quickly from posted 70mph speed to less than 40mph even though I pushed the accelerator pedal and reved the engine high. While in this low power driving mode, a warning came on saying the collision detection system was disabled. The concern is the person behind me had no warning since my brake lights did not come on. He sped around me with a bit of road rage. The problem temporarily goes away when you turn the ignition off and back on. I took it to the dealer and the said it needed a new EGR Cooler 4 hours labor $1500. Chevy Dealer pulled two codes P0401 Exhaust Gas Recirculation "A" Flow Insufficient Detected P1E00 Hybrid/EV Powertrain Control Module 2 I paid them the $165 diagnosis fee and got my car back and just plan to restart when it occurs. In another instance, I was pulling out from a parking lot into a busy road in electric mode and the car lost ALL power leaving me exposed in the line of traffic. Error messages on the dash said to 'service BECM' and 'shift to park'. The car was not drivable and had to be towed. Call me if you need any more information. Thank you, [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Cumming, GA, USA

Vehicle suddenly would not function. All systems became inoperable. When serviced it was determined to be a sudden failure of the BECM module which required total replacement. Part was on national back order leaving vehicle unusable for weeks.

- Asheville, NC, USA

Loss of Motive Power due to EGR Valve. I was driving down the highway when I experienced a loss of motive power and the Volt entered a reduced power state while in moving traffic. After the EV battery ran out and the ICE turned on, the following message showed up on the instrument panel "Propulsion Power Is Reduced" and the check engine light turned on. The Volt slowed down and would not accelerate to the speed of the moving traffic. I was able to get off the highway and drive home under reduced power which was still not safe. The engine ran very rough on the way home and was not able to maintain speed high enough for the flow of traffic on the roads. The dealer diagnosed the issues as a failed EGR Valve. The part was on backorder for about a month. In that time, a GM trained technician deemed the car operable (according to GM standards) and said that I could take it back and drive it on electricity only. Unfortunately, that meant that the EV range is about 40 miles in winter after a full charge and running out of electricity would again result in a hazardous loss of power. The behavior of the car under this reduced propulsion is Identical to the one in investigation PE23022 - Loss of Motive Power due to the Battery Energy Control Module. The Chevy Volt EGR Valve issue is a common problem reported in other NHTSA complaints and Volt forum posts and I am surprised that there has not been a recall. I hope that this issue is investigated same as the BECM issue. Some examples: NHTSA ID Number: 11558668 NHTSA ID Number: 11557845 NHTSA ID Number: 11557876 NHTSA ID Number: 11557995 NHTSA ID Number: 11483673 [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Chapel Hill, NC, USA

The latest episode with my 2017 Chevy Volt is a culmination of years of issues with the low clearance on the vehicle causing continual damage and unsafe driving conditions that require expensive repairs due to the design flaw (note - I had a 2014 Chevy Volt that had NONE of these problems). My son was driving the car a week ago and the Engine Control Module (GM part # 12700116) fell OUT of the car. This led to the car to stop driving instantly - if he had been anywhere other than a quiet residential street it could have been catastrophic. Upon having towed the vehicle to the dealership, I was informed that the wiring harness failed which led to the ECM falling onto the street. I drive this car strictly in city limits and on major highways, and despite this the bottom undercarriage is constantly damaged because it is simply to low to the ground. In addition to the repair bill of $3K+ (my 4th repair required due to this defect), the harness isn't even available and GM cannot provide an ETA for when it will be. I experienced a similar issue 6 months ago when a part was backordered for 3+ months and this is compounded by the fact that their dealerships no longer have loan car inventory. Note that there was no warning before this happened. I have tried escalating to GM but their response is essentially that I am SOL. Again - this is a design flaw of the vehicle that should have been addressed but never was. Note that this doesn't include the other continual issues (well documented) that continue to plague the car after other recall service (loss of propulsion, shifter issues that frequently make it impossible to actually turn the car off, etc.)

- Dallas, TX, USA

Vehicle periodically throws P0964 and P0AC4 related to TSB PIC6330. Recently, this has led to poor running of internal combustion engine and low/undrivable power, almost leaving me stranded. Took multiple restarts before I could drive the vehicle. The TSB indicates to replace part# 24285319 (internal transmission solenoid control harness) however GM indicates they have discontinued manufacture of this part. How am I supposed to get my 6 year old car fixed if GM doesn't supply the part?

- Berthoud, CO, USA

EGR valve failed. Dealer supplied part has been on back order for more than five months.

- E. Freetown, MA, USA

The BECM located in the battery compartment failed The vehicle was completely immobilized and would turn on but would not "start" leaving me stranded. Away from home. The local Chevrolet dealership confirmed the BECM was at fault The vehicle gave no clear indication of a pending BECM failure before the failure

- Redford , MI, USA

Consistent BCEM failure with volt. Power Reduced even if battery has full charge and gas is in tank. Forward Collision made unavailable without reason whilst driving. I rely on the forward collision system while driving at night in my area because of drivers cutting each other off constantly, so losing this feature without knowing why it failed feels unsafe to me. Forward collision would also activate when no vehicle is infront of me causing the car to suddenly stop and jerk on the road. Propulsion power is reduced is an extremely common occurrence in my volt. It happens randomly while driving and even while charging. When I'm on the highway the car would slow down when the warning came on; even with cars right behind me. I'm scared one day the car's system will cause an accident because of it's unpredictability. Regular maintenance has been performed and no issues have been found. The problem continues to persist.

- Centerville, GA, USA

On 3/11/2023, I was heading home when my vehicle lost power in the middle of the freeway. Luckily, I was able to safely pull over to the side of the freeway. Since this is a plug-in hybrid, there are two gauges showing how much electric and gas is in the car. When I checked, both showed were empty; however, although I knew that I did not have much electricity in the battery, I had nearly a full tank of gas. The vehicle should have had automatically switched over to the gas but did not. After a few minutes of leaving the car off, I was able to restart the vehicle in gas mode and drive home safely. I brought in the vehicle to my local Chevy dealership to have it diagnosed. It was determine that the computer had registerd multiple faults p0030, 31, 54, 135, 403, 405, 443, 458 and 537. They also found TSB 21-NA-116. They had found that the 15 AMP fuse was blown. They had to replace the EGR valve assembly. Total time was 2 weeks to repair as they had to wait for the parts from Chevy. Per WO, parts 12346290 (Coolant) and 12691147 (Valve) were replaced. After replacement, vehicle have been running fine for the past 9 months. Prior to the engine shutting off, there was a message on the screen while driving which says "Propulsion Power is Reduced". The electric gauge was empty but the gas tank show nearly a full tank.

- Fremont, CA, USA

This vehicle has a very dangerous malfunction. There was no power when I tried to move out of the way of an out-of-control semi truck while driving on the highway by pressing the pedal. I made every effort to maneuver because I was terrified. But because of the power outage, I could have died. This is really worrying, and I hope you can address the issue raised by Chevy so that someone else might be spared and so that future generations of electric cars are constructed to a standard that includes safety. Thank you.

- Yeadon, PA, USA

I was driving on the freeway and the engine turned off. I was able to continue driving as the hybrid system still had some charge to continue powering the car. I had to get the EGR valve replaced. No warning lights prior to this occuring but had check engine light after. Car would not shift into drive nor would it accept a charge for the main drive battery. Had to be towed to a shop and resulted in getting the Battery Energy Control Module (BECM) replaced.

- Huntington Beach, CA, USA

The car started stating "put in park" every time I would try to put the car in drive. I would shift back and forth from park to drive over and over and I could get it to clear. One time it lost all power and had zero control. Sat on the side of the road for an hour. Shifting back and forth until it stopped and let me engage the drive. The last time it happened in a parking lot and it would just say"shift to park" I couldn't get it out of park. Had to have the car towed. Tow driver had to drag the car on the flat bed with a wench because it was stuck in park. Had the vehicle repaired. Replaced an electronic control module that had previous service bulletins on but GM would not cover the repairs. I was lucky I was not injured our involved in a wreck when I experienced these issues. I was not aware I could file a report about this until I read there was an open investigation on the same issue I had.

- Crestline, OH, USA