2018 CHEVROLET VOLT Fuel/propulsion System Problems

On June 27, 2025, while driving, the vehicle displayed a "Propulsion Power Reduced" warning message and a Check Engine Light illuminated. I immediately experienced a loss of power. I brought the vehicle to an authorized Chevrolet dealer the same day. On July 1, 2025, the dealer diagnosed the failure as a faulty Battery Energy Control Module (BECM) and high-voltage system fault (Code P1E00), requiring a full replacement of the high-voltage battery pack (Part #24296900). The manufacturer (GM) was contacted, and the replacement battery was ordered on July 2, 2025. As of December 2025, the vehicle remains in dealer possession (over 5 months) with no repair completed. The manufacturer has stated the part is on indefinite backorder with no ETA. The failure of this component renders the vehicle inoperable and presents a safety risk due to sudden loss of propulsion power while in motion. The manufacturer has confirmed the failure but is unable to provide a remedy within a reasonable timeframe.

Why in operation the car goes into Shift to Park and Also getting a Propulsion Power Reduce

Component: Battery Energy Control Module, available from dealership ATM Daughter's safety compromised when vehicle power decreased quickly to 5mph in the middle of fast heavy city traffic. The problem has been confirmed by Chevrolet dealership service department The vehicle has not been inspected by other than dealership service center. I contacted GM, and was told that the component was replaced once already in 2021, so they will not replace it a second time on special coverage N232432680 released March 6, 2024. Warnings:Propulsion 11/3/25 Power Reduced and check engine light on 11/3/25. GM dealer service center cleared codes, did a software update 11/7/25: Propulsion Power Reduced and check engine light again. Vehicle is at GM dealer service center.

Chevy had done an update for the Propulsion Power being reduced. In 2024, I had to do another update when the check engine light came on. After that the electric battery power decreased, I am only getting 17 miles per charge. August 2025, the check engine light came on again. I had it check and no codes came up. While driving home on the freeway, the Propulsion Power being reduced warning came up. I had to pull off the freeway. Once I turned my vehicle off, I was unable to drive my car. There was not any acceleration. I had to have my car towed 50 miles home. A mechanic was able to repair it at that time. On 10/7/2025 the check engine light came on again and once again no codes appeared, on 10/14/25 the Propulsion Power being reduced warning came on again. I was able to get home safely, but I got off the freeway and took side streets home. At this time, the vehicle will not accelerate.

The car can't decide if it wants to use the battery or the engine. It shows zero charge even though it is full. It lurches at stop lights as it tries to decide whether to use battery or engine. It says "propulsion power reduced". "Not able to charge". "Shift to park". Check engine light is on.

In 2020, GM issued a recall (#N192273600) for emissions pipes on the Chevy Volt that could be compromised by rubbing against the A/C hose connector. I took my vehicle to my local dealership (Chesrown Chevrolet) to have this issue remedied, that same year. This year, my check engine light came on and this same dealership informed me that the cause was this same issue (i.e. a compromised emissions pipe due to rubbing against the A/C/ hose connector). Assuming the fix was conducted per GM's specs, GM did not provide an adequate fix for their faulty design.

Electrically actuated EGR valve fails, it draws too much current and blows the F03 fuse (Labeled “No Walk Home”) which has 4 other components on it, this causes “Reduced propulsion” message, soon after the engine overheats due to one or more of the 3 other components that lost power, and the “Engine not available” message appears and the vehicle loses all motive power. This syndrome is well documented in the GM-Volt online forum. Additionally this vehicle has portions of the EV battery that failed, I am still waiting for battery parts to arrive and its been 4 months, many owners have waited between 1 and 2 years for the battery to be fixed, this contributed to this issue as the electric propulsion would have possibly been available if the warrantied battery was repaired within a reasonable timeframe. I was refused a service loaner. My recent contact with Chevrolet customer service suggested I rent a car, and they will reimburse $45 per day, however they insist I pay for it and when the repair is complete, they will reimburse me. There is a gentleman on the Volt forum who has laid out about $5,000 on rental cars for well over a year, and is finally reluctantly getting a buyback, but they depreciated the car but did separately make good on the rental reimbursement. Neither he nor I really want that result, we want the car repaired in a good faith effort, instead both battery parts and EGR valves are in short supply. Currently the GM part is between $1400 and $2500 when in 2024 the same part was widely available for $240. I understand this is a bit rambling, but the context matters, and GM is dragging their feet on servicing the warranty liability they have. My TZEV warranty is good until 2034 and they are actively trying to kill my car off to save the ongoing cost of servicing this warranty. They are also putting owners at risk. Please consider a battery recall and an EGR valve recall. Regards, [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

On [XXX], our 2018 Chevy Volt experienced a critical BECM (Battery Energy Control Module) failure while being driven by our [XXX] daughter. The failure caused the vehicle to enter limp mode, resulting in a severe loss of power and the inability to shift properly. Most alarmingly, the brakes failed to function correctly—despite being fully engaged, the car continued to move forward at a red light, placing our daughter in immediate danger. She was only able to safely stop the vehicle by maneuvering it off the road into a parking lot. This BECM defect is a well-documented issue for Chevy Volts from 2016 to 2018. However, Chevrolet has refused to cover our VIN under the existing special service bulletin, despite our vehicle using the same faulty part number as those included in the recall, and has provided no explanation for this exclusion. As a result, we are being forced to pay $2,100 out of pocket to replace a part that GM knows is defective. This is an unacceptable financial burden for a safety-critical issue. GM should immediately issue a recall for all vehicles equipped with this faulty part number to ensure the safety of all drivers and prevent further undue costs. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

On May 26, the car was running in electric mode and switched to gas because the power batteries were depleted. Shortly after switching to gas mode, lights came on the dash board saying Engine Not Available Get Service Immediately. I was on a highway at the time and fortunately had just enough left to get off and the car would not move any further. Turning the car on and off did not resolve the problem. It had to be towed to a Chevy dealer. Even after an hour, the messages would come on when trying to start the car. The next day, the dealer called and said they could find no problems with the car and it works fine. This happened once before, but that time there was enough charge in the battery to get home and then later it would start without the message.

BECM module is failing producing a reduced propulsion message. This is happening while driving which is a safety issue. Limiting the ability to drive, handle and brake with the vehicle.

Vehicle produced error without any warning about propulsion system no longer working shortly after low fuel warning when tank is fuel and engine fails and vehicles comes to a crawl.

Issue Summary: The Chevy Volt has experienced recurring electrical problems, including the "Shift to Park" message, loss of power, and dead 12V battery. The vehicle had to be towed to the dealership three times due to these issues. One incident involved a power loss while driving at 65 mph, which caused a near-miss with a semi-truck, posing a significant safety risk. Warranty Status: The additional warranty was purchased, but only one of the three incidents occurred while the vehicle was under warranty. Safety Concerns: The repeated electrical failures, especially while driving at high speeds, raise serious safety concerns

EGR valve failure at highway speed of 70mpg on busy road with passenger and service dog in vehicle on a road trip (on ICE not electric). This produces a reduced propulsion in the vehicle and it becomes unsafe to drive. The EGR failure blew the 15A #3 fuse known as the "no walk home" fuse, so I needed to be towed to a parts store then unplug the EGR valve to make it somewhere safe. It was a Sunday, so every dealership (in the VA area at least) was closed. It is a well known/documented issue and the warranties have been extended, but only in a few states with the CARB protections. There are no warnings, if I was not an adept driver, we could all be dead. I also became stranded ~six hours from my home and only ~eight thousand miles outside of warranty. The replacement part costs ~$1800 without labor - the most expensive EGR valve the 60yr old parts employee at the dealership had ever seen, on a hybrid car which doesn't even truly require the part to operate or to pass emissions in some states. I think GM will help me with a goodwill repair in this case, as I have been a loyal Chevy customer my entire life and Volt owner since 2013 - but that is not the norm, so please take action and extend warranty protection to all Volt owners like the BECM issue.

Yesterday, my daughter was driving on [XXX] in Seattle traveling around 65mph when the vehicle lost power and reported the error of "shift to park", "Propulsion reduced" and "StabiliTrak failure". Luckily, she coasted to an off-ramp and safely put the vehicle in park. Thankfully she was not involved in an accident, but was very shaken by the experience. After doing some research it seems that the Chevy Volt has a known issue with the BECM and GM has failed to issue a recall, putting thousands of lives at risk. After turning the vehicle on and off several times, she was able to get it started and with minimal propulsion on residential streets was able to return to our house. this morning I dropped the vehicle at our local GM dealer for diagnosis and repair, but wanted to file a report, to hopefully prevent this from happening to another unsuspecting driver/child. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Randomly getting Propulsion power is reduced and loss power while driving. Been force to pull over to the side on the freeway to restart the car.

The BECM (Battery Electric Control Module) failed in November of 2023. Mountain Chevrolet has had my vehicle since then, claiming to be unable to find replacement battery module. The vehicle is available for inspection at Mountain Chevrolet (it has been left unlocked, unprotected, and exposed to the elements for almost 15 months now). When the BECM failed, the vehicle lost virtually all power and slowed dramatically from highway speeds to ~20 mph. There were no warnings prior to the failure.

Driving on gas on the highway, the adaptive cruise control suddenly disabled with a "Reduced Propulsion" message on the dash and a check engine light. The car started struggling in its propulsion. We found an AutoZone and scanned the codes, and multiple were returned. A Google search pointed us to the "walk home" fuse, which indeed had been blown. Replacing that fuse and disconnecting/reconnecting the battery eliminated the errors. Less than a week later during highway driving (the next time the battery charge was used up and it switched to the ICE) I got another check engine light, but this time without the "reduced propulsion" message. Scanning at AutoZone again revealed a P0404 message referencing the EGR valve. Due to the limited availability of the part I have called into Covert Bastrop (Bastrop, TX) and am waiting to hear back on their ability to fix the car.

The issue started with a forward push while lowering my speed while coming to a stop. It then progressed to a trembling engine. Then it progressed to the car struggling to effectively switch from electric to gas and back. It then would only be usable on electric range and the engine would not start and would be greyed out. Now, it only works on engine mode, it uses fuel like a pick up truck, it loses power while driving due to trying to switch to electric mode and back, and it struggles to accelerate. It will do it while idle as well as while driving 45mph and up. It barely has any propulsion power and I have to turn my hazards on any time I am going to accelerate. If I brake hard the engine will shake violently and then shut off. I then have to switch gears from drive to park or neutral to park to drive to reengage the engine. Recently it has turned on all the accessories but the ev and the gas is greyed out and there is zero propulsion power. I replaced the 12v battery thinking it might have been dying and it still has the same issue. I read about the class action lawsuit for the BCEM and have made an appointment the dealership but when I told them what was wrong with it the said we need to wait for the diagnostics.

On 9/18/24 I was driving my Chevrolet 2018 Volt on a freeway, traveling at approximately 55 mph while starting to exit the freeway. In the middle of fast-moving traffic, on the freeway offramp and starting to decelerate, the car suddenly displayed a message saying "Propulsion Power is Reduced." A micro-second later, the displayed message changed to read "Action Required: Shift to Park" and in that moment I lost control of the car's powertrain. I continued to break, coming to a slow stop in the middle lane of a multi-lane offramp, with other cars speeding past and around me. I attempted to power the car down and reboot it, moving the gear shift into "Park" position as instructed, but nothing changed. The car remained totally inoperable. I was on a slight decline and noticed the car moving forward pulled by gravity, so I steered the car to the farthest right of the offramp/parallel street, where I put my hazard signals on and requested the car be towed to a mechanic. I was endangered because the car lost entire propulsion while in the middle of fast-moving freeway traffic, and fellow motorists were endangered as well. I have learned that this same behavior occurs routinely with 2nd generation Volts; that there is a special bulletin related to the car's BCEM *and* a related class-action lawsuit posed against GM/Chevrolet. I requested Chevrolet take preemptive action to repair the BCEM, as I am fearful the issue will repeat and cause additional danger to myself and fellow motorists, but Chevrolet says they cannot repair the part until it is diagnosed as defective... which will occur when/if the part fails again, and I'm already in danger.

On 8/30/2024 I had driven my 2018 Volt (purchased new on 3/27/2019), with about 45,000 miles on it, on a normally 5 hour trip. About 3 hours into my trip on I-94 my car suddenly slowed down with a "Reduced Propulsion" message and a check engine light that came on. (The engine probably has run less than 25,000 miles of the total miles I have driven it, with the rest being purely on battery.) I was extremely fortunate to have been in the slow lane when the car suddenly stopped accelerating. This could have easily turned out very, very bad. The next day I had a dealer diagnose the car for a little over $400 - they told me there was a problem with my engines EGR valve and that the parts were back ordered so they couldn't give me an indication of when it could be repaired. I got the car back to my home dealer and they charged me another $200 to re-diagnose the problem and came the same conclusion of a bad EGR valve. They too have been unable to get a valve from GM. They have quoted me about $4,000 to have a new valve installed when they can get one. Heck, the car only has 45,000 miles on it!!

While driving our 2018 Chevy Volt, dashboard warning message “Propulsion Power Reduced” displayed. Vehicle performance was not otherwise affected. Subsequent diagnosis from our Chevy Dealer was, among other things, a faulty Exhaust Gas Recirculation (EGR) valve. We were informed that our vehicle was “no longer safe to drive in this condition” and the vehicle has been sitting on the Dealer’s lot awaiting a replacement part for 2 months and counting, with no expectation of near-term resolution of our problem. We are aware that this is a widespread problem on 2017-18 Volt models, with many dissatisfied owners.

I think this is an EGR or BECM issue. Yes, the car is available for inspection. I plan on calling the local dealership soon. The car loses speed and does not respond to the accelerator. It must be turned off and back on again to function properly. This is very dangerous when it happens in traffic. The check engine light comes on, and a reduced propulsion message has appeared. This has happened several times over the past couple of weeks. Each time, I was driving in normal mode, using electric power. Suddenly, the electric range displayed zero miles left, the gas engine turned on, but the car lost speed and would not respond to the accelerator. I have not had it inspected because I don't know how to force it to replicate. I don't want to pay for the dealership to diagnose a problem they won't find.

I have had 3 separate "Low Propulsion" warnings pop up, in combination with a check engine light, in the last 9 months. Everytime I take it to the dealership, they say it was a same code, and something to do with the oil valve. They repair it, and 3 months later it happens again. Going in for my 4'th repair soon, but I just saw there was a recall issued on the BCEM, but apparently it only applies to certain VINs? I have seen online posts from people saying they had to call GM to get them to approve the recall for their vehicles. Why would it only be certain vins?

Reduced Power/Low Propulsion warning, Check engine light. Car may experience reduced power. Could be hazardous at high speed. Dealer diagnosed vehicle and found bad EGR valve. Part is on back order with consumers waiting months even years for replacement part

Our Volt EGR valve has gone bad and car not drivable. They claim these have been on back order (very expensive) for a year! They also say it's NOT part of emissions! WTH? Car gas 36k HELP!!

On [XXX] while driving with my son in IN on [XXX] to my niece's wedding in PA, a reduced power warning sounded on the driver's console. Was able to stop and get gas at the eastbound travel plaza near mile marker [XXX]. Getting back on the road and accelerating toward 70 mph, suddenly lost all drive power. The fuel gauge side of the console was lit in yellow and said something like "No fuel detected." Pulled over to the shoulder and found the engine would start, run, and then die. An IN State Police Officer was kind enough to offer us an escort to the next exit near mile marker [XXX]. Noticed that the engine would remain running for longer periods and finally stayed on continuously. While being escorted, was able to run the speed up to 55 mph and made it safely to the interstate exit. During this time my son was checking online and found that the problem might be due a blown fuse. At the [XXX] exit we found a Pilot station that carried fuse sets. One of the sets had the fuse we needed. We bought two sets. We replaced the fuse--it had blown--and the car ran well again. This fuse is called "No walk home." We were able to continue on at 70 mph until stopping at a friends home in western PA for a few hours rest. While at our friend's home we partially charged the Volt's battery giving us about 20 miles of electric range. While in electric mode we stopped for gas. We drove through the mountains without incident then stopped for gas again in central PA at the Cumberland Valley Service Plaza. Filled the tank and while accelerating from the plaza again lost power and had to pull over. Replacing the fuse solved the problem once more. It appeared that turning off the engine while in gas mode and then turning the engine back on leads to the fuse blowing. That Sunday on the return trip to IL, I never turned the car off when refueling. This got me back home without incident. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

While driving on the highway, the EGR valve in my car malfunctioned, initially causing my dashboard to read "Propulsion Power is Reduced". After continuing to drive the car, the dashboard read 'Engine not available, service soon', where it stalled and we had to restart the car. After restarting, the car went into EV mode with significantly reduced speed. Our safety was put at risk due to the initial stalling and subsequent reduced speed on the highway. The problem has been reproduced since the initial incident and our dealership confirmed the problem relating to the EGR valve which continues to blow fuses when the engine is over-exerted while using gas. The dealership said that this is covered under warranty however, there has been a 5-year back-order on the part and they are refusing to offer any loaner car or compensation for a rental car.

While driving in August 2023, the vehicle seemed to lose acceleration power and a warning regarding the reduced propulsion appeared. The vehicle was taken in to the dealership and the diagnosis was that the EGR valve needed to be replaced. Still waiting on the issue to be resolved as GM doesn't seem to have the part required to fix the problem.

The "module" that controls the engine's charging of the battery failed and the car quickly went into reduced power mode and then quickly shut down altogether this happened within a mile or so. Fortunately this happened on a parkway where I could get to the curb safely. However, I had just come off [XXX] in St. Louis with very heavy 65 MPH traffic, and had it shut down a few miles earlier I would have been in real trouble. I understand the NHTSA has opened an investigation into this type of problem with the Volt, but I have also heard that G M is reporting they have the parts to fix cars that are affected. This is not true! I live in Lenexa, KS, and my Volt is at ELCO Chevrolet in Baldwin MO. The service representative told me on [XXX] the part I need is "on backorder" and he has no idea when the part might be supplied to him. Apparently, GM does not have this part anywhere in the world, a part without which the car will not move. This is inexcusable! INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Early on the week of November 9th my car displayed a message that there was "Low propulsion power - engine not available." Upon returning home and parking the car it started without incident the following day. On November [XXX], my vehicle stated "Low propulsion power - engine not available" but this time the car shut down completely leaving me unable to return home. I had the car towed to Fairway Chevrolet for repairs. The service technician indicated that the catalytic converter needed to be replaced and the part was out of stock and would take 3 weeks to become available. No rental or loaner car was provided. On November [XXX] I was told that my car was fixed and it would be able to be picked up. I picked up the car and parked it at home and drove the car I was currently renting to California for the Thanksgiving holiday. Upon returning home, I returned my rental and returned to my car. The car behaved normally but after driving down a busy roadway for less than 2 miles the "Low propulsion power - engine not available" message reappeared and the car shut off IMMEDIATELY. This is horrifyingly dangerous especially considering the speed and location of where I was driving. I had the car towed to Fairway Chevrolet but didn't speak to anyone until the morning. In the morning I called in and explained what happened and stressed the safety fact that my car was returned and malfunctioned in a very dangerous way. The tech said that they were going to perform a diagnostic which they were going to charge me for, even though the original repair did not fix the defect. Fairway performed the diagnostic and stated they need to clean the engine bay and run a separate diagnostic of the brake system. These total more than $1.6k out of pocket and are not related to the power deactivating while in motion. My car is still at Fairway as they have not started the repairs and I am still self paying for a rental car. Fairway is uncooperative and refuse to check into the propulsion INFORMATION REDACTED PURSUANT TO THE FREEDOM OF

Lost propulsion power went from doing 75mph to 35mph on the fast lane with no warning vehicles swerving to avoid hitting me..very scary and dangerous 3rd time this happens I now try to avoid fast traffic.. please look into this someone going to get hurt if no action taken..

My 2018 Chevy Volt has experienced the GM knows BECM issue. There are several Volt Owners that have experienced this issue. I would like to bring this to the attention for GM to post a recall/mandatory service repair as my car stopped working, would not start, was displaying false information on the electrical module, etc. Issue: 1. Car would not start 2. Battery stated fully charged with solid green light but display showed only 1 electric mile available 3. Tried to shift car to Reverse press gas nothing happened 4. Tried to shift car to Drive press gas nothing happened. 5. Car engine light is on 6. Utter confusion as stress as I’m stranded with no way to get my car working 7. Chevy dealership has had my car for one week now with the only update of ordered BECM module. No ETA on when this will be fixed 8. No indication of what caused the issue

After recent repair of hybrid transmission, experienced a loss of power, MIL, and several trouble codes related to the battery control module (BECM). This affects safety as the loss of propulsion unexpectedly causes deviations in speed from typical traffic flow. The problem was confirmed by OnStar and a manufacturer representative was advised with a dealer appointment scheduled when they next open. There were no lamps or other symptoms prior to this MIL and loss of power. Restarts after shut down have not been attempted until able to take the vehicle to the dealership.

"Propulsion power reduced" message along with check engine light, loss of propulsion power from battery, loss of ability to charge battery. OBD2 scanner reveals P1E00, and 12 U26xx fault codes relating to Battery Energy Control Module failure.

The BECM on my 2018 Chevrolet Volt has failed and I am being told it may be months before the dealership will have the part to fix the issue.

After getting some repeated "propulsion power is reduced" display warnings, my 2018 Chevrolet Volt literally died without warning while I was driving it on New Year's Eve and could not be restarted.

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.

In June of 2023 the car experienced propulsion power reduction. The car was at the dealer awaiting repair for 3 weeks. On Dec. 14,2023 the same thing happened again. The car was also unable to accelerate once mobile. The car has about 90k miles on it.

Car died while driving down road. Has engine codes to service high voltage system although It showed a full battery it only had 1 mile range and the gas motor wouldn't run.

The Battery Energy Control Module needs to be replaced (BECM). The car is available to be inspected at Key Chevrolet in South Burlington, VT. The car was parked when it failed. The car wouldn't start (lights on the dashboard came on) and it wouldn't turn off. I got a "shift to park" error message, regardless of which gear I was in. The car wouldn't go into Drive to go forward with either the drive battery or the gas generator. I had the car was towed to the dealership. It was inspected and diagnosed by them. When they did the diagnosis, they said the BECM had failed and there were cells in the drive battery that needed to be replaced. The BECM failure is a common problem with Chevrolet Volts and is covered by the Voltec warranty. There were no warning lights or other warnings (e.g., reduced propulsion) whatsoever. The car had shut off like normal but would not start or turn completely off. I was fortunate to have had the BECM fail while the car was parked. My understanding is that BECMs can fail while the car is moving and the power will stop and you won't have any control.

the vehicle will lose power without warning on a regular basis. the vehicle will also accelerate unexpectedly when switching from battery to engine power at speeds under 50 mph. I have taken the vehicle to the dealer and have been informed there is nothing they can do for me, the vehicle does not have any faulty components.

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.

While Driving my 2018 Chevy Volt from Payson Utah to Provo Utah going north on the I-15 Freeway the car Lost Power and came to a stop. Luckily I was in the outside lane and was able to coast to a stop on the shoulder and wait for a tow truck to take the car to the nearest dealer in Spanish Fork Utah. My safety could have been seriously affected if I had remained stalled on the freeway. The car would no longer start or Turn off. The display only showed that the car should be shifted to park even though I had already completed that request. The car has been inspected by the Dealer for GM. No one else that I know of has inspected the car. No Previous warnings or messages appeared before the incident occured.. The Dealer is Telling me the car’s battery energy control module needs to be replaced and that it could take months to get a part. This is way to long for a car to wait to get repaired if the manufacturer claims to still be making the part.

The vehicle has a failure of the BECM and the EGR valve and cooler. Both parts are unavailable. I've been without my car for over a month. The service center cannot tell me when parts will be available.

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.

On 8/3/ 2023, my 2018 Chevrolet Volt lost propulsion power while I was camping in the Lassen National Forest near Susanville, CA. I was leaving my campsite when I was on the way to Bend, OR when the car lost power and went into limp mode. It was a two lane road on CA 36 without a shoulder, so I was stuck on a travel lane. I was able to turn the car off and on for a few seconds where I would reach a maximum speed of about 15 mph for about 5-10 seconds before the car would go into limp mode again. I did this for about 20 to 30 times until I reached an incline and the car did not have enough power to inch up the hill, so I had to push the car down the travel lane to the nearest open space I could find that would not block the travel lane. After walking two miles to get cell phone reception, I was able to contact AAA where then towed my vehicle two hours south to the nearest Chevrolet dealership in Reno, NV (Champion Chevrolet). I had to rent a car to continue my trip and eventually get back home. On 8/21/2023, I was contacted by Champion Chevrolet and was told that the issue was the issue was the Battery Energy Control Module (BECM) and that was going to be covered under warranty. However, they noted that the BECM was on national backorder and that there was no ETA for when they would receive the part. Because of this, I had to extend my rental for the month at a cost of about $1,800 to be able to get home to Los Angeles. As I write this on 12/1/2023, I have still not received my vehicle from the dealership and the part is still not available. I've now lost almost 4 months of use of my car and still make payments on it, after I purchased it at lease end. The car had about 55,000 miles on the odometer when the car stopped working and the BECM issue was discovered. The status on the part for my car is still backordered with no ETA. After reading GMs claims they have sufficient replacements in supply, I write this complaint to call their bluff, as no parts are available.

Upon attempting to start the car, displayed "Propulsion Power Is Reduced" error message and "Check Engine" light came on, and the car failed to start. Mission Bay Chevrolet on Morena Blvd in San Diego repaired the car by replacing the BECM. This repair was covered under the Voltec warranty, so I was not charged for it, but lost usage of the car for 18 days it was in the shop. November 8-26, 2021.

The car lost propulsion while driving on an on-ramp road onto an interstate, luckily the car was able to make it the shoulder. Vehicle slowed to below 40mph and intermittently down to 0mph when waiting and restarting vehicle. Able to finally get home in the emergency lane. VERY DANGEROUS and do not recommend! The check engine light was not on prior to this and it was taken to the dealership where it diagnosed as a faulty battery energy control module (BECM). The part is under warranty and awaiting replacement, but no spare parts are currently available. Internet review indicates an average of 3 months or 90-day until part received, serviced, installed, and repaired. Dealership without loaner car until November 22nd. Unacceptable customer service per previous GM rules to have a rental available and did not offer a rental service alternative upon drop off of the 2018 Volt.

When the vehicle is placed in park and I attempt to turn it off, the dash will indicate the vehicle is not in park and subsequently, the vehicle cannot be turned off. Sometimes, if you wiggle the shifter or move it through all the settings (RNDL) and back to park, it will resolve the issue. Sometimes, it can take a few minutes to resolve the issue. It's getting worse. If you can't shut off car someone can steal it, you also can't lock doors.

The BECM (Battery Electric Charging Module) is failing, and making my Chevrolet Volt unsafe to drive. I can't get over 35 miles per hour on the highway, and it stops driving on electricity randomly. Going from 25 miles to saying 0 miles of EV charge while driving on the road. It also says "reduced propulsion", and has a hard time accelerating from a complete stop.

While driving my 2018 chevy volt I received a reduced propulsion error. I pulled over to assess and turn off the car and turn it back on only to find when I turned it back on I received an enginer failure error and the car would not drive forward or reverse. I had to have it towed to a Chevy dealership for evaluation. I understand from research and talking to service experts this is a common failure among the 2017 and 2018 Chevy volt and it is abhorrent that Chevy has not issued a recall on a common failure that compromises the safety of the driver and other drivers around them.

My 2018 Chevrolet Volt has a defective Battery Energy Control Module (BECM). Because of the defect my car lost all propulsion while I was driving. Neither battery motor nor gasoline engine would work and the car would not switch between the two. I was literally stuck in the roadway (fortunately not on a highway. The Check Engine light was on. I was able to barely get the vehicle to a GM dealer, where they diagnosed a defective BECM. The part is apparently on back order and some owners have waited months for the part to arrive. This is a serious safety issue by potentially causing a vehicle to lose power while operating in traffic.

There is a good chance my battery energy control module will fail on the highway creating a dangerous situation. Why has a recall not been issued?

Although the battery showed fully charged, the vehicle was not using battery power. At various points I would receive a "propulsion power reduced warning" and the car would lose power. I was driving on 2-lane windy country roads with no passing zones and lots of hills. At one particularly steep hill, I received the warning light and the car started lowing power again. By the time I reached the crest, the car had nearly come to a complete standstill. I have no doubt had I not reached it at that point, the car would have lost all power and begun rolling backward. The speed limit on this road is 55mph with several blind curves and hills, so the potential for a serious collision was great had it begun to roll back. When I reached my destination and turned off the car and restarted it again, it would only shift to neutral. It is now at the dealership where it was diagnosed as needing the BECM replaced.

To begin, I will set the scene of my experience. I was traveling east bound on 84 in northeast PA on my way to Long Island for work meetings that day. I was about one hour and a half away from my home at roughly 6am. I was traveling at apx. 70 mph when my car suddenly says "engine unavailable, reduced propulsion." and the fueld tank turned yellow in color on my dashboard. Then a sign said "service soon." My car then COMPLETELY STOPPED WORKING. My speed fell from 75 mph or so to 0 in a matter of a minute, I had no idea what was happening because there were no appropriate warnings such as, "Pull over immediately" or "SAFETY CONCERN PLEASE GET OFF THE HIGHWAY" -I would have taken anything to know that this was an actual emergency and I needed to at least get to a shoulder. I luckily was able to come to a stop mostly off the highway in a shoulder. I was located around a bend, in the pitch black, unable to stay in my car out of fear I would be smashed by a tractor trailer or car that did not see my car suddenly stopped. The car would not go in neutral or anything other than park and I left the hazards on (they eventually failed). I called my husband who drove to me while I stood on the side of the highway for an hour and a half in 30 degree weather. I called the police who were eventually able to put up flares and mark me as a hazard on the road. If there was a car traveling behind me, I would have been killed or seriously injured because I slowed so suddenly and had no way of knowing that this was an absolute emergency. The worst part is that this is the second BECM failure in my volt and I have driven less than 1000miles since it was repaired the first time (which took >5 months). The first time this happened my car was on a quiet town road and my brother who was driving just parked and had it towed. He hadn't thought there were any warnings but he wasn't sure. This time, I could have been smashed on the hwy with little to no warning. I can't believe Im alive.

Reduc d propulsion power warning while driving in EV mode. ICE started and was able to make it 1/2 mile home. Failure diagnosed to a faulty BECM. Has been at the dealer for 1 month today with no word on when the part or repair will be done.

While driving, message suddenly pops up on the dashboard "propulsion power is reduced." Check engine light is light on.

NTSB SHOULD REQUIRE A RECALL OF CERTAIN CHEVROLET VOLTS. AS AN OWNER I RECEIVED A LETTER FROM CHEVROLET STATING THAT MY VOLT 'MAY HAVE A CONDITION WHERE IT COULD GRADUALLY LOSE THE ABILITY TO MAINTAIN VOLTAGE. IF BATTERY CONCERNS ARE NOT ADDRESSED, OVER TIME THE VEHICLE COULD ENTER A REDUCED PROPULSION MODE WHILE DRIVING, OR LOSE PROPULSION, OR IT MAY NOT START.' LOSING PROPULSION WHILE DRIVING IS A SERIOUS SAFETY ISSUE, AND WARRANTS A RECALL. [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Mileage: 30,432

WHILE DRIVING THE VEHICLE AT AROUND 60 MPH, THE 'CHECK ENGINE' LIGHT CAME ON AND A MESSAGE SAYING 'SHIFT TO PARK' APPEARS ON THE DASHBOARD. ONCE THE VEHICLE WAS STOPPED AT THE TRAFFIC LIGHT, THE DRIVER SHIFTED TO PARK AND WAS NOT ABLE TO PULL DOWN TO DRIVE AGAIN. VEHICLE WAS STRANDED IN THE MIDDLE OF THE ROAD WHILE CARS WERE APPROACHING FROM BEHIND WITH HIGH SPEED. AFTER REPEATED ATTEMPTS TO PRESS THE VEHICLE 'START' BUTTON, WE FINALLY WERE ABLE TO PULL DOWN TO NEUTRAL AND PUSHED THE VEHICLE TO THE SIDE OF THE ROAD. VEHICLE NEEDED TO BE TOWED TO DEALERSHIP FOR DIAGNOSIS.

Mileage: 2,800