2015 Chevrolet Malibu engine problems

Filed Aug 16, 2026 · Brakes, Electrical · KY

While driving my 2015 Chevrolet Malibu on a four-lane highway with a posted speed limit of 70 mph, the vehicle displayed an “Engine Power Is Reduced” message and limited the vehicle to less than approximately 25 mph. This created a serious safety concern because the vehicle could no longer maintain highway traffic speed, resulting in a significant speed differential of nearly 45 mph below the posted limit and surrounding traffic flow, creating a high risk of being struck by other vehicles. The vehicle also experienced an alternator problem while being driven on the highway. It repeatedly acted like it was not getting enough power to maintain the speed of surrounding traffic, and we had to pull over on the side of the road. The vehicle has also had an engine-related issue discovered during repairs. When the valve cover gaskets were replaced, the vacuum pump was found to be severely damaged, and metal shavings were found in the engine oil. The reduced-engine-power problem has occurred in connection with the vehicle's electrical and engine problems. The vehicle and affected components may be available for inspection upon request. The vehicle has been inspected during repairs, and the damaged vacuum pump and metal shavings in the oil were observed during that inspection. These problems create a safety risk because the vehicle can suddenly lose engine power and become unable to maintain highway speed. The loss of normal power while traveling on a four-lane highway could make it difficult to accelerate, merge, or get out of the way of other vehicles.

Filed Jan 21, 2026 · Electrical, Engine · MO

The car continues to die when I come to a stop. The error code for the engine light is P305F. I have changed both batteries along with several different sensors and spent thousands of dollars in repairs at a couple different shops and still can’t find the problem with this error code. I have fixed everything that this error code points to. The car will not pass inspection with the check engine code on. This should have been recalled as this is a very common problem.

Filed Nov 13, 2025 · Electrical, Engine · AZ

The transmission and engine fails repeatedly. The vehicle repeatedly stalls while accelerating at all speeds, simultaneously, the gear shift lights,dash lights, radio, etc restarts. Issue also happens when shifting gears. Issue happens at every stop light and stop sign, when the vehicle is engaged in ‘auto stop’. The vehicle has been in and out of the repair shop since 2022 for TCM/ECM failure. The vehicle has been inspected by Chevrolet twice and other repair shops. Problem persists and the vehicle is not safe to drive. The vehicle has to be jumped daily in order for it to work even after purchasing several batteries and alternators. Warranty company, SilverRock, denied claim. When shifting gears, the warning message states ‘power steering’ and all of the car lights disappear and the vehicle stalls. These issues appeared 31 days after purchase in May of 2022.

Filed Aug 9, 2024 · Engine · IL

As your driving the REDUCED ENGINE POWER pops up and dropped your speed down to 25-20 mph no matter how fast you're going no way to reset it unless you have a scan tool but then it comes back on scan tool says PEDAL ACCELERATOR POSITION SENSOR IS THE ISSUE put new one on and a day later same thing same answer now im putting second PEDAL ACCELERATOR POSITION SENSOR on

Filed Mar 27, 2024 · Electrical, Engine · MS

have a 2015 Chevy Malibu that is randomly trying to start itself. The key fob is the original when I bought it. It has the auto start on the fob but is the kind that requires the key in the ignition to drive.car completely off (not in aux) but the key is in ignition, could be for 2 minutes or hours, and randomly it will try and start, but not fully turn the engine and actually start, just that little half second of a start and then go right back off. Today it did it 3 times in a row. Obviously I won’t be leaving my key in the ignition any longer as it does seem to require that,

Filed Oct 13, 2023 · Engine · MT

When driving at highway speeds the car will show “Engine reduced power” and will either drop to 20-40 mph or shut off completely. Engine codes show as cam shaft sensor, crankshaft sensor and fuel pressure regulator. I had the cam shag and crank shaft sensors replaced and it stopped for a few months. It started doing it again this week and today it did it then shut off completely and won’t restart

Filed Jun 9, 2023 · Brakes, Engine · OH

The vacuum boost pump failed suddenly leaving the vehicle with no brakes and potentially causing catastrophic engine damage.

Filed Jan 18, 2023 · Engine, Fuel system · NV

My car keeps cutting out while I'm driving I've taken it to the Chevy dealership and they did a diagnostic test and it comes up with air intake system cat is running to lean

Filed Nov 28, 2022 · Engine · FL · fire

At 2:30AM car was sitting in driveway and the engine caught on fire burning the engine, front left tire etc.

Filed Nov 4, 2022 · Acceleration, Engine · PA

I was almost to work on the highway and my car dashboard said Engine Power is Reduced. It quickly started powering down from 74 directly to 50 then 40, then 35 and finally to 26 before I could safely pull off to the side of the road. This issue is getting worse it takes at least 10 minutes of waiting and turning my car off and on before it is back to normal. Others have said that they have gone to the garage and had it replaced and it just continues to happen. This needs to be a recall and not just a change of parts every few months.