I got the -??propulsion power is reduced-?? warning at ~83.5k miles on the odometer, while visiting friends 4 hours from home. Pulled over and called 3 local dealerships and all servicing departments are closed on Sunday so knew there was nothing I could do except try to limp back to my friends house safely and reevaluate. On the 20 minute drive back, the engine cut out on the freeway and the car immediately started slowing down. I coasted to the next freeway exit safely with my hazards on. The scary part was that I had no power after the -??engine unavailable-?? warning popped up since the battery was completely drained already. I was able to get it towed to the closest chevy dealership and leave the keys for them. I am waiting to hear the official diagnosis from the dealership once they take a look. The cause is still unknown but this sounds like a similar series of events for BECM failure.

- Downey, CA, USA

The contact's son owns a 2016 Chevrolet Volt. The contact stated that the vehicle was taken to the dealer due to an oil leak caused by a puncture in the oil filter. The vehicle was repaired. The contact's son had informed the dealer that he had been smelling a fuel odor inside the vehicle; however, the dealer informed the contact's son that the odor was probably a burning oil odor. The vehicle was taken to an independent mechanic, where it was diagnosed that the fuel rail was leaking and needed to be replaced. The mechanic contacted the dealer who informed him that the part was on a national backorder. The mechanic replaced the part with a used part; however, the failure persisted. The dealer was notified of the failure and informed the contact that the part was on backorder. The vehicle was not repaired. The manufacturer was notified of the failure and offered a coupon towards the purchase of a new vehicle. The failure mileage was approximately 60,000. The contact stated the Volt engine starts periodically even if it has battery power available. The engine forces itself on and can not be turned off manually.

- Silver Spring, MD, USA

My car will lose all power as I'm driving, switch between gas/ elec and almost stall, it will accelerate when I take my foot OFF the gas, it will lose power on a turn.. it's random. form what I understand it's the BECM and it happened just after 100k miles. I have 105k.

- Oak Park, MI, USA

Check engine light came on reduced propulsion warning. Took to Chevrolet dealer and they diagnosed EGR value failure while on road trip. Got home Took it to my local dealership and same diagnosed no part available and emissions warranty is good and it is covered but 2 year nationwide backorder by GM. The car only shows 47000 miles without parts I will not be able to use the vehicle after it fails the emissions test for Maryland.

- Fallston, MD, USA

I had just left my house about to enter the on-ramp to Interstate 95 south when my 2016 Volt abruptly and without warning stopped. I was unable to coast or pull the car to the side of the road. I was in the middle of the lane in a dangerous place to stop a car and a dangerous place to get out of the car due to the steady traffic entering the interstate. My car would not restart and I had it towed to the Portsmouth NH Chevy dealer. As it was the beginning of the GM strike I had to wait several days for the replacement battery control sensor then I had to wait for another 4 weeks or so for a replacement transmission to be installed. The day after I got my car back, about 2 weeks ago, the transmission fluid was leaking onto the garage floor. The Chevy dealer has ordered new transmission hoses but only one has come in and I was told not to drive my car until these were replaced. The sensor pad and transmission were covered under warranty, I was told the hoses to the transmission and labor to install them are not part of the transmission and not covered. The incident has been extremely inconvenient but the way my car just abruptly stopped and wouldn-??t restart was very unnerving and could have been very dangerous. I do not have paperwork at the moment but can provide a dealer invoice of the covered work so far. Please contact me with any questions.

- Portsmouth, NH, USA

I have a engine code P0401

- Brentwood, NY, USA

Driving 72mph down I5 interstate the display notified me with a check engine light with two errors, enigne propulsion reduced and engine overheating. I pulled over to the side of the road and called a tow. This was a very traumatic event. I had my partner and my 2 year old daughter in the car.I just purchased this used vehicle from a Toyota dealer the same day. It has 63k miles on it and still under powertrain warranty. I literally drove the car 45 miles. TOTAL. I have spent more time towing and fixing this car than actually driving it. This is a total lemon. I need a refund from GM and all the pain and suffering that this caused my family.

- Portland, OR, USA

I had BECM failure and the car suddenly stopped in the middle of the road. They need to make this a safety recall.

- Largo, FL, USA

I was driving on a highway and all of a sudden I have a Check engine light and -??propulsion power reduced-?? on my display. I took my car to the dealer and found out it was my EGR valve that had an internal failure and it was needed to be replaced. This should be a recall because I was under warranty and they stated that my warranty only covers in California or an emission state. It-??s been about 2 months it-??s been on back order and I cant even drive my car. This is not a rare problem every volt with a EGR valve has failed.

- Largo, FL, USA

Component: Dealer said its the BECM. Lots of them failing, check any Chevy Volt forum. What happened: Driving on road, battery drive turns off and it switches to gas engine, "reduced propulsion" message pops up, then gas engine quits and 'shift to park' message pops up. No electric motor, no gas engine, coasting, then stuck in road, traffic piling up behind me. After half-hour or so of blocking traffic and me trying to restart the car, electric eventually 'reset' and it worked fine again, so I drove it the several miles home, and the charging system connected fine. Next morning, charging system said it was broken, and car would not start. Towed to dealer. Safety risk: Both battery drive and gas engine turned fully off while traveling on road - no power, and steering/brakes hard to use. Luckily was in slow lane on local road near corner with traffic light, so others were 'prepared' to slow down, avoided my stopped car, and were able to get around. Prior Symptoms: Within the prior week, battery drive switched to gas engine with 'reduced propulsion' popup, but then it switched back to battery drive after stopping and restarting. Several times noticed the 'battery charge' indicator would change color and the estimated mileage remaining would bounce between 0 and 47.

- Raleigh, NC, USA

Our 2016 Volt was cruising at 65 mph on a major interstate highway (HOLD mode) when out of nowhere the check engine light came on followed by a warning message "Propulsion power reduced." We managed to pull off the highway, but a few minutes later navigating on local roads, we received another message that the engine had overheated and was shutting off. Fortunately, there was a chevy dealer only several miles away, and we made it there slowly under EV mode. They later traced the problem to a failed exhaust gas recirculation (ERG) valve. It was replaced under warranty. The whole experience was terrifying. We also own a 2017 Volt, and now we are afraid that it could also experience the same problem without warning.

- Chadds Ford, PA, USA

While on a road trip, we were traveling on a rural highway at roughly 55 mph. We received a warning message on the dashboard stating that "Propulsion power was reduced" and the engine began running rough, with surging noticeable based on throttle position. We also noted that engine temperature was rising above what was typical for the vehicle. The vehicle was able to maintain highway speed, and we were able to limp the vehicle to a safe location. Based on a web search, we were able to diagnose the issue (a failed EGR valve) as well as a way to limp the vehicle to a local dealership. They made a change that allowed us to limp home safely (unplug the EGR valve's electrical connector and replace the blown fuse under the hood). The vehicle was taken to a Chevy dealership when we made it home. The failure we had diagnosed was confirmed, and the component was replaced. The repair was not covered under warranty, and cost a significant sum to repair (1139.91). Additionally, this appears to be a very, very common failure for this make and model of vehicle- to the point where there is so much demand for this repair to be performed that these components (the EGR valve specifically) are difficult to obtain from Chevy. Additionally, the failure mode is such that when the EGR valve fails, it pulls excessive currents, and blows a fuse that also controls a number of important engine cooling components, leaving engine cooling significantly compromised. If we had been going faster, or if the weather was warmer, or if the load inside the vehicle was heavier, it would have been easy to overheat the gas engine and leave us stranded. I am concerned about the incidence rate of the failure, (based on online reports) the relative small number of miles on the vehicle when the failure occurred, (~57k) and the possible knock-on effect of the failure of the gas engine's ability to cool itself due to a relatively unrelated failure.

- Lakewood, OH, USA

Got a Check Engine light on Aug 26 2022 driving about 5 minutes out of my house. With that light turned on, the EV showed zero miles range (it was fully charged when I left the house), the ICE engine kicked in but it was running very harsh and when I stepped on the gas peddle, it would not accelerate and can only go about 30 mph. I immediately made a U-turn and returned home for the car is not drivable. Took the Volt to my dealership on Aug 29, 2022 and service manager diagnosed as a BECM failed and now waiting for a replacement, which they said they are not able to find one. This is going on week #7.

- Kent, WA, USA

Vehicle suddenly experienced "reduced propulsion mode" on the highway. Multiple codes were triggered in the ECM. Root cause of the problem was the EGR valve which is on a shared circuit with multiple other components including a water pump which causes the car to overheat.

- Bethlehem, PA, USA

Received a Reduce Power warning with a check engine light on. OnStar e-mail notification saying there is an issue with Lithium-ion battery and to service the vehicle within 7 days. When this happened I was driving on the street not far from my house and sure enough I was not able to keep up with the speed of the traffic so I turned around and returned home. My battery was fully charged when I left home and when this happened, it showed my battery was depleted and switched to my gas engine but was not able to drive over 40 mph for the gas engine was making a weird sound as if it is not able to run smoothly.

- Kent, WA, USA

My car, without warning, lost power while driving and then flashed an engine light. This happened on a street and I was able to coast to safety, but if it had happened in an intersection I would not have been so lucky. The problem was confirmed by a dealer as a failure of the Battery Energy Control Module, which has been happening to this car with numerous other owners, according to the Volt owner website.

- Graniteville, SC, USA

The vehicle issues a message to move the gear shifter into park (shift to park) message even when it is already in park. The vehicle will not engage nor will it enable the driver to turn the vehicle off which results in unsafe driving circumstances and strands the drive in untenable situations. This is known in social media as the "shift-to-park" problem with Volt and other GM vehicles while GM is hush-hush about the issue. There absolutely needs to be a recall issued for all affected vehicles as this is clearly a manufacturer design issue given all of the problems drivers are having. It starts as an intermittent problem and continues to get worse over time with out any warning.

- Saratoga, CA, USA

When attempting to turn off the car it says "action required: Shift to park" and will proceed as being left on, despite being in park. This occurs about 70% of the time the car is driven and takes several tries of turning on the car, moving, parking, and turning back off before the engine shuts off without this warning.

- St Louis, MO, USA

Unable to turn off power to car with error on dashboard saying shift to park. Have to power on and off several times while moving the shifter in and out of park to get the car to turn off.

- Kent, WA, USA

The contact owns a 2016 Chevrolet Volt. The contact stated that the back-up camera was malfunctioning and the front console would not work if other services were being used. The contact had to turn off and restart the vehicle to get the console to work again. The vehicle was taken to reliable Chevrolet (800 N central expy, richardson, tx 75080, (972) 201-9240) where they re-flashed the module and changed the camera; however, the failure recurred and the vehicle would shut off when parked. The vehicle was a hybrid and the battery was depleted. The contact was concerned about the carbon monoxide level in her garage. The vehicle was getting more and more difficult to shut off and the contact had to wait several minutes to make sure it finally shut off. The vehicle was taken back to the dealer where they stated that they would contact the manufacturer and call back. The failure mileage was 5,000. The consumer stated unresponsive display goes blank when starting the vehicle. The consumer further states when a vehicle is turned off having errors not recognizing the vehicle is in park.

- Richardson, TX, USA