Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2012 Chevrolet Volt owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owns a 2012 Chevrolet Volt. The contact stated that while his son was driving 55 MPH, the vehicle lost motive power. The vehicle was taken to the dealer and diagnosed with engine software failure. The contact was informed that the engine software needed to be updated. The vehicle was not repaired and remained at the dealer. The manufacturer was made aware of the failure. The failure mileage was approximately 113,000.
7/6/2024 Was driving 45 mph on a busy road (running only on the gas engine of this plug-in hybrid). Propulsion Power Reduced message showed near the speedometer. My speed was immediately decreased. The check engine light also came on. Despite pressing the gas pedal, the speed could not be maintained and I had to pull off quickly before causing an accident. Luckily, no accident occurred but I fear would could have happened if I wasn't in the right place to pull over quickly. After getting the car towed to a Chevy dealership, they diagnosed the problem as being with the hybrid battery - it needs to be replaced. I don't understand why I had a full tank of gas, was running on gas, and that a bad EV battery would cause ALL propulsion to stop so quickly.
Vehicle over-revs in cold weather. Engine runs excessively fast (4250 RPM) at highway speeds and around 3000 RPM when just sitting. Often times if I pull over and restart the car it will correct itself. This results in MPG as low as 22. The internet is full of examples of people with the exact same problem. I have seen no examples of the problem being solved. The engine will operate correctly in warmer weather (above 50 F). I believe it is related to an aging propulsion battery and could be solved by improved programing to accommodate the battery state.
I'm constantly receiving a "Propulsion Power Loss" notification on my car. I have brought the car in to a Chevrolet dealer and they refuse to fix it unless I start paying out of pocket costs because the ticket is "closed". This has been going on for about a year since I purchased the car last November and I'm terrified to drive this car since it literally looses power.
The car will shut itself off with very little time to get to the side of the road if that is even a possibility. When switching from battery power to the gas motor. Randomly. The car will die at any speed. First message is low propulsion power. Next message engine not available, service soon. Less than 4 minutes from 1st message to total shut down. Least amount of time between messages and shut down is 15 seconds. Car will decelerate (on highway where vehicles behind have no warning... No brake lights that car is rapidly losing speed). Never know when it will happen. Usually car will restart and run terrible.. After 20 minutes or so. After restart car runs bad low power. Check engine light is on. After 10 more minutes of driving. It straightens out. Usually. Dealership unable to find problem. Assorted codes in computer. Very dangerous when driving. …
My 2012 Chevy Volt has completely shut off at freeway speeds, and surface streets on over 15 occasions. The power steering assist goes out, the brake assist goes out and it's very difficult to steer and break the car, I have nearly avoided several accidents, there is no warning that this will occur.the power steering assist goes out, the brake assist goes out and it's very difficult to steer and break the car, I have nearly avoided several accidents, there is no warning that this will occur once I have attempted to safely pull over the car says engine not available, propulsion power reduced, the car will not turn off and it says waiting to initialize on the screen. …
I have owned the vehicle for 4.5 years. In the last two months the error message "propulsion power reduced" has happened and the vehicle has gone into lip mode. All three times the message occurred when the vehicle was started, battery depleted, and gas engine running. Drivabilty was an issue as the car was in limp mode and would not accelerate properly. My car was taken to the dealer, twice. I was told by jay townsend, district manager aftersales Chevrolet, that this is normal operation and he pointed to a bulletin. He said there is no fix, but that going into limp mode spontaneously was a " vehicle characteristic ". It is illogical that an error message popping up is normal "vehicle characteristics" and that going into limp mode is normal. This is a big problem that GM seems willing to accept. …
My car has had ongoing problems with power propulsion, electrical system, and start-up since new and several items were replaced in 2017. I purchased 6 year / 100,000 extended warranty when new. Several items have been replaced. But updates are needed to keep the car running properly. Now the warranty has expired but the vehicle still needs updates to run properly and the dealer wants paid to install updates. This is a scam if the car wont run with out being updated yearly. I have a video of the car in 2017 when I started it up and it sounded as though it was going to blow up. I couldn't shut it off and called OnStar to shut off the vehicle. That is when several items were replaced. The car is in the dealership again for another update. 8-28-20. There was an updated performed 11-11-19 and 10-10-18. It seems as though there is always an update being performed.
Tl* the contact owns a 2012 Chevrolet Volt. The contact stated that while driving at 60 MPH, the reduced propulsion error message was displayed on the instrument panel. The engine revved up and the vehicle stalled without warning. The contact pulled over and restarted the vehicle however, the vehicle failed to accelerate. The vehicle was towed to beaty Chevrolet (9615 parkside dr, knoxville, tn 37922) where he was informed that the voltage on the battery was low and needed to be replaced. The contact spoke to serra Chevrolet Cadillac Buick GMC Kia (189 stonebridge blvd, jackson, tn 38305) where the dealer discussed trading in the vehicle, but offered no assistance for the repair. The manufacturer was notified of the failure. The vehicle was not repaired. The failure mileage was 162,000.
Vehicle dies suddenly while moving, although under full electric charge. Could not restart. Chevy said was software problem and made fix dec 2018. Just happened again yesterday 2/17. Others reported on Volt blog site. Said wait 5-10 minutes and then restart, which I did and that worked. Concern that loss of power is sudden and without warning. Died in middle of intersection this time but fortunately no cross traffic. This is serious problem -- apparently others have had same issue. Reporting to local Chevy dealer at this time.
Engine complaints in other Volt years
Frequently asked questions
How common are engine problems on the 2012 Chevrolet Volt?
NHTSA has 27 complaints about the engine & cooling of the 2012 Chevrolet Volt, 11% of the model year's 245 complaints.
Is there a recall for 2012 Chevrolet Volt engine problems?
No. NHTSA lists no engine & cooling recall for the 2012 Chevrolet Volt, though it has 2 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2012 Chevrolet Volt engine problems start?
Half of the complaints with a recorded mileage happened before about 57,000 miles, and 32% before 25,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.