When driving down a major highway going 70MPH, my 2017 Chevy Malibu speeds decreased, the brakes locked up, and the vehicle would not accelerate. Eventually the car came to a complete stop and an -??engine power reduced-?? notification came up on the dash. I was able to pull off to the side of the road but I was traveling at a high rate of speed on a busy road, I almost got hit multiple times by people behind me who also had to swerve out of the way to keep from getting hit. After turning the car off and on again it seemed to run fine for a few months until the issue happened again going down a busy highway (65mph) again putting myself, my kids and others on the road behind me at risk. Now the car won-??t move more than 5 feet before shutting off with -?? engine power reduced -?? still displaying on the screen.

- Ocala, FL, USA

The contact owns a 2017 Chevrolet Malibu. The contact stated while driving at an undisclosed speed, the vehicle stalled and failed to exceed 20 MPH. The engine power reduced message was displayed. The vehicle was taken to the dealer where it was diagnosed and determined that the accelerator pedal position sensor and the battery had failed and needed to be replaced. The contact was informed that the engine also needed to be replaced. The vehicle was repaired; however, the failure recurred. The manufacturer was not made aware of the failure. The approximate failure mileage was 102,000.

- Mason, OH, USA

The contact owns a 2017 Chevrolet Malibu. The contact stated that while shifting into park(P), the vehicle failed to turn off as needed. The contact stated that the message "Please Shift to Park" was displayed and the check engine warning light was illuminated. The contact stated that after restarting the vehicle, the vehicle resumed normal operation. The vehicle was taken to an independent mechanic who diagnosed the vehicle with a defective gear shifter wiring harness, and a battery current sensor failure. The vehicle was not repaired. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was unknown.

- Schaumburg, IL, USA

The contact owns a 2017 Chevrolet Malibu. The contact stated that the accelerator pedal lost connection while driving 65 MPH. The contact stated that the vehicle lost motive power while driving. There were no warning lights illuminated. The vehicle was taken to the local dealer, where it was diagnosed and determined that the accelerator pedal sensor was not connecting with the accelerator pedal. The vehicle was repaired. The manufacturer was contacted, and opened a case, but no additional assistance was provided. The failure mileage was approximately 185,000.

- Cincinnati, OH, USA

The contact owns a 2017 Chevrolet Malibu. The contact stated while driving approximately 65 MPH, the instrument panel displayed the message -??Reduce Engine Power-?? with the check engine warning light illuminated. The vehicle immediately decelerated independently. The contact continued to depress the accelerator pedal; however, the vehicle failed to exceed 35 - 40 MPH before decelerating again. The contact pulled over to the side of the roadway and waited for approximately 15 minutes before continuing to drive; however, the failure persisted. The vehicle was taken to a certified mechanic where it was diagnosed and determined that the ABS, Power Train, and Throttle Sensor all had failed and needed to be replaced. The vehicle was not repaired by the mechanic. The vehicle was taken to the dealer but was not yet diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was 70,000.

- Bronx, NY, USA

Engine power reduced

- Indianapolis , IN, USA

On Thursday, [XXX] my [XXX] son was driving my chevy malibu coming down the hill to get home when the brakes went out. He could not stop the vehicle and had to pass our neighborhood and let the vehicle slow itself down. He was able to get stopped and turned around and made it home. Saturday, [XXX] we decided maybe it needed new brakes and took it for new brakes. New brakes and rotors all the way around did NOT fix the problem. The brake was like hitting a brick and would not stop the vehicle. I had the vehicle towed to a repair shop and they found that the vacuum system for the brakes went out. He also noticed that cam shaft was cracked. Upon research through the internet I found that this problem is common and a class action suit has been filed against GM for the same problem. I am unsure why this is not a recall as its a safety issue and my son could have been injured or injured someone else. This has been an EXTREMELY expensive repair for us! When they went to replace the cam shaft there were several parts of the cam shaft just blown all over the engine. We still have not found all of the missing parts. This has caused most of the seals to have to be replaced as well. I do not have a repair receipt yet as the vehicle is still in the shop INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Kansas City, MO, USA

Vacuum Pump exploded, my breaks went out on the freeway. Metal pieces from the pump went into engine. Broke the camshaft. Now having to pay hundreds and hundreds of dollars to repair. I am missing out on work u til this can be fixed.

- Ontario, CA, USA

The contact owns a 2017 Chevrolet Malibu. The contact stated that while driving at an undisclosed speed, the vehicle stalled, and the engine seized. In addition, the message that there was no power was displayed. The vehicle was towed to an independent mechanic where it was diagnosed with engine failure. The contact was informed that the engine needed to be replaced. The contact was informed that the failure was due to a blown spark plug. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 37,200.

- Nottingham, MD, USA

The contact owns a 2017 Chevrolet Malibu. The contact stated that while stationary at a stop light and attempting to depress the accelerator pedal, the vehicle failed to respond as intended, and the vehicle stalled in the middle of an intersection. The vehicle was previously repaired; however, the failure persisted. The contact stated that the failure usually occurred during summer, on very hot days. The contact also stated that the check engine warning light was illuminated. The vehicle was taken to a local dealer however, the failure could not be duplicated. The vehicle was not repaired. The manufacturer was made aware of the failure; however, no assistance was provided. The failure mileage was approximately 75,000.

- Albuquerque, NM, USA

P0301 Error - Cylinder 1 Misfire. First the Check Engine light and Service Stabilitrack light turn on. Then seconds later, the car began to violently shake and sometimes the gas will not go resulting in the car being stuck in the middle of the road for about 60 seconds before moving again in stop-and-go traffic. These warning lights turn off and on. The dealer says this is the result of a plastic piece breaking due to general wear-and-tear and the only solutions are to replace the pistons or replace the whole engine. Multiple smaller repair shops say this is a known issue and it doesn't have any open recalls. [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Phoenix, AZ, USA

I was in the freeway and out of nowhere an alert message popped up on the dashboard saying Engine power reduced. This made my car go from 65mph to 30 mph is the freeway luckily I was able to exit and go to the nearest gas station and was able to keep myself safe as others on the road but it could've easily gone very badly. The car won't go over 30 mph. The car is available for inspection upon request, I seen a PDF in the nhtsa website of a special coverage adjustment for loss of continuity within acceleration pedal position circuit. I will attach it to this message.

- Houston, TX, USA

Unknown. Original owner.24,000 miles. When car turned off, shift to park message occurs. Required 10 on off cycles to turn car off. Dangerous since could be draining battery.

- Saint Paul, MN, USA

While driving my vehicle the engine light turned on with a message stating -??engine power reduced-??. I am unable to drive over 20 miles per hour.

- Hillsdale, MI, USA

I keep getting a message that goes on and off saying engine power reduced, which slows the pick up and the car down while driving.

- Lake Worth, FL, USA

The vehicle showed no warning signs prior. The vehicle was being driven and it STOPPED as it If the breaks had been pressed in the middle of driving on a highway. Afterwards a message popped up that said engine power reduced. After that message appeared the car came to a stop and would not start back up.

- Port Saint Lucie, FL, USA

The Power Brake Vacuum Assist Failure nearly caused a wreck. The part failed while we were driving on [XXX] going 65 miles per hour on a busy highway. As the breaks gave out the engine light said -??Reduced Power-??. Moments later, the breaks stopped working and the engine stopped running. We were able to coast off the highway and into an HEB parking lot and have the vehicle towed. The mechanic took the part off and found that it was in pieces causing further examination of the engine to look for the missing metal. Pictures are available to see the damage. Even after completing the repairs the vehicle is showing reduced power. We are still trying to get it fixed but understand that the Chevrolet company is aware of the issue but never issued a recall. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- League City, TX, USA

On numerous occasions while driving on highway my dashboard will display reduced engine power and engine light comes on. My traction control light also comes on. Car loses power quickly and will not accelerate. I-??ve had to pull over numerous times almost being hit by cars behind me. Took it to get repaired and had to have fuel pump replaced as wires had melted to side of pump. Three months later same problem happened. This car is scary to drive

- Maquoketa , IA, USA

Ice and sludge accumulated and froze causing the CAC system to fail resulting in engine issues, performance loss this was caused from GM poor design of a shield that they are aware of. GM knows that this can happen and have now designed a new shield to prevent this from happening but it is at the owner-??s expense to fix. If GM knows that this will happen they should fix the issue I am now out of pocket $3,000 shame on them

- Birch Run , MI, USA

Engine reduced power while driving in traffic car gets no power to accelerate and engine light also on.

- Milwaukee, WI, USA