The EGR Valve on the vehicle went bad, causing the vehicle to display 'propulsion reduce' and 'engine not available' errors on the dashboard before the vehicle came to a stop while driving on an interstate. Searching this issue for the Chevrolet Volt online yields a significant amount of similar issues experienced by other Volt owners. Vehicle was inspected and repaired by a Chevrolet dealership, but seems to be a recurring issue with very limited parts supplied by GM, leading to potential of very long delays in repair time.

- St. Louis, MO, USA

Was driving home from work and my car just stopped check engine light came one the engine came on but then went off and i was stranded my issurance came threw with a tow but from all good to a complete stop sucks

- Portland, MI, USA

My BECM failed on my 2017 Volt. The vehicle set a check engine light and went into reduced engine power 3 times when I was driving it. I took it to a dealer in Metaire, Louisiana. That was 4 weeks ago. I have no confirmation of when the vehicle will be repaired. I have been communicating with both GM Customer Assistance and the dealership, Best Chevrolet in Metaire, Louisiana.

- Linden, MI, USA

I was traveling at 75 mph with the cruise control on when a message came on about reduced purpulsion. My vehicle lost all power and rapidly decreased speed, the gas pedal did nothing until my speed had dropped under 60 mph. I was on the freeway and could have caused an accident. Chevrolet says a programming update was needed to fix the problem but my BECM is now also out.

- Annandale, MN, USA

Car would not start, lose power, or show propulsion reduced message. This seemed to have been an ongoing issue related to cold weather (bought in July 2019) and would occasionally get temporary check engine lights. Dec 2022 and Jan 2023 cold weather seemed to aggravate w car no starting on occasion. Eventually by January car started propulsion reduced error. Turned out to be BECM (which had been under service bulletin in 2019). Other related repairs like shift to park issue and drained 12 volt battery also repaired at MY personal cost of nearly $4,000. The propulsion issue almost led to some accidents when it would happen pulling into road or on highway driving.

- Portsmouth, NH, USA

Driving on the road with a near full electric battery and then lost most of my power and got this message on the dash along with a check engine light. "Propulsion Power is Reduced" - I was in freeway traffic on a hill and had to put hazards on to move to the slow lane. Engine came on and seemed to be revving to full power to maintain speed.

- Winthrop, WA, USA

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

I was in a neighborhood driving ~30 mph and slowed down to take a right turn. Once I completed the turn my car stalled out completely and would no longer accelerate. I tried putting the car in park and back into drive with no luck. I quickly turned the car off and back on and was able to resume driving. As I was just through the intersection I could have easily been hit while motionless and had my newborn baby and wife with me in the car at the time. The issue has no happened again, but I am terrified it might. As there were no warning signs or any signals of problem in the dashboard I don't have any idea when it might happen again.

- West Chicago, IL, USA

While we were driving on the freeway, we saw a check engine light and -??propulsion power is reduced-?? message. The car began driving very roughly and we had to slow down. We had this happen once before where the car engine stopped working entirely while driving at city speeds after seeing this error earlier in the summer, so we pulled over as soon as we could. We were traveling in a remote area at the time, just before the holidays, and it was fairly cold out. The car dealer inspected the car and told us it was unsafe to drive, that we could not take it back until it was fixed, and that it was an EGR valve problem. We previously had this fixed under warranty as well for similar behavior, and the car is barely five years old with very few miles on it. It-??s our only car and we have been waiting on the part for weeks now, with no response on when we-??ll be able to have our car back, and no rental car that we can drive in the meantime to get to our jobs and get groceries. The part is covered under our warranty. Both times this has happened to us, we were actively driving. In the city, it was very unsafe for the engine to unexpectedly stop as we were driving because of the amount of traffic and pedestrians, and because it meant we didn-??t have full control of the vehicle. On the freeway, it was very unsafe because of the speed we were going on the freeway. Knowing that our engine was at high risk of unexpectedly stopping working while driving on the freeway from the past experience in the city made it difficult to safely concentrate on pulling over and also maneuver in traffic.

- Malden, MA, USA

Vehicle lost power on highway and on local streets. -??Propulsion power reduced-?? warning. Car brought to dealer 7/2023. EGR valve ordered at that time. The EGR valve has not been available since that time. No time frame for availability has been given.

- Falls Church, VA, 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

Propulsion power reduced message appears on dash board. Yes available for inspection. Unsafe to drive losing power on highway. Yes there are warning error messages appearing on dashboard.

- Santa Ana, CA, 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

First, the electrical system did fail suddenly in August 2023. Luckily, I was parked and so was not injured. I did report the electrical failure to the Hendrick Chevrolet dealership in Durham. But this Chevrolet Volt also does not fill up with gas. At the pump, gas just spills out of the tank. I've seen online that many people have this same problem. At the suggestion of Hendrick Chevrolet dealership in Durham (and after paying $210 for a diagnostic), I replaced the vent valve solenoid. The car filled up with gas twice. But once again, gas starts spilling out of the tank if you try and fill it up. The car only has about 25,000 miles on it and hasn't been driven extensively so it doesn't make sense that it is malfunctioning.

- Durham, NC, 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

We were driving on the highway (my wife and younger son were passengers, and my 17 year old son was driver). He was in electric mode and then the engine propulsion reduced message came on and the check engine light came on. Car was still running, albeit slower. We stopped and filled up the gas, and got an engine unavailable message. Vehicle switched back to battery mode on its own and because there was no charge, the vehicle stopped ON THE HIGHWAY. The car lost all control and power abilities and it was very dangerous. They were able to pull over into the break down lane and they called a tow. Took the car to Mike Reichenbach Chevrolet in SC and they removed and replaced the EGR valve. However, within the last couple of weeks, my son has received the loss of propulsion message again and the car is violently shaking. This is a safety issue!

- Naples, FL, USA

The Volts BECM has failed. There are warning lights constantly warning about Engine and low Propulsion. There are multiple symptoms. Most serious is that car has stalled while driving 3 times. If I pull over, put in park, then turn off; I can restart the engine using battery mode. It does not drive well in gas mode where gas fuels generator to charge battery for propulsion. It is now very loud and often won't allow you to drive faster than 30 MPH. The mileage diagnostics (MPG) are just over 50% of what they were before problem started. It often randomly switches from battery mode to gas. This is undesired. My problem is that the only certified tech is on other side of Island Volcano. I have no confidence that I can drive it to dealer, given the distance and power required to climb mountain. So, I am stuck with no way to fix. There are widespread reported issues, similar to mine, caused by defective BECM (Battery Energy Control Module). Problem started September 2023 and have issues every day I dare drive it.

- Kailua Kona, HI, USA