2018 Chevrolet Malibu: sudden loss of power

Filed Sep 26, 2026 · Acceleration, Brakes · IL

I was driving in town through a stoplight when I noticed my brakes stopped working. Also when I had stopped the car still in drive and the car had shut off completely in the middle of the road and was not able to turn back on. The car would keep trying start but none were successful. My car also stated that there was reduced power to the engine and the car would hesitate to gain speed as well. My safety and others were put to risk because my brakes stopped working so I could’ve caused an accident. When we trying to find what was wrong with it through a code reader we had noticed the piece had shattered inside of the engine. No insurance, police or manufacturer has inspected the issue.

Filed Sep 2, 2026 · Engine, Transmission · 180,000 miles · GA

The contact owns a 2018 Chevrolet Malibu. The contact stated that while the vehicle was parked, the message "Shift to Park" was displayed on the instrument panel. The gear shifter was shifted back into drive and then back into park to turn off the vehicle. The contact also stated that while driving approximately 65 MPH, the vehicle shuddered, started to lose automotive power, and then continued driving; however, the vehicle operated at reduced power and failed to exceed 30 MPH. The check engine warning light was illuminated. The vehicle was restarted; however, the failure persisted. The contact stated that there was an unknown liquid dripping underneath the vehicle. The manufacturer was notified of the failure. The failure mileage was approximately 180,000.

Filed Apr 22, 2026 · Engine, Transmission · 116,000 miles · OH

The contact owns a 2018 Chevrolet Malibu. The contact stated that on several occasions while driving at various speeds, the message "Engine Power Reduced" was displayed, and the check engine warning light was illuminated. The contact stated that after 20 minutes of consecutive driving, the vehicle drove sluggishly and lost power. The vehicle was taken to an independent mechanic, where the check engine warning light was reset, but the diagnostic result was not provided. The vehicle was then taken to another independent mechanic where a diagnostic test could not be performed because the machine was unable to remain connected to the ECM. The vehicle was then taken to a dealer, but was not diagnosed. The contact stated that an unknown software update was performed; however, the failure persisted. The vehicle was taken to the same dealer where it was diagnosed and determined that three fuel injectors were weak, there was a crack in the lower oil pan, and that the oil pan needed to be replaced. The vehicle was partially repaired by replacing the oil pan, but the fuel injectors were not replaced. The contact stated that on several occasions during the summer, after turning the vehicle off, the message "Shift to Park" was displayed. The vehicle was turned on and the shifter was shifted several times and was turned off several times until the correct gear selection was recognized. The manufacturer was not notified of the failure. The failure mileage was approximately 116,000.

Filed Mar 4, 2026 · Fuel system, Steering · CA

In 2020, I received multiple red recall notices in the mail regarding a safety issue. I scheduled an appointment with a Chevrolet dealership in Los Angeles and have a voicemail confirming the appointment. At the time, I did not follow through with ensuring the repair was fully completed, which I take responsibility for. However, the vehicle has continued to experience the same dangerous symptoms. My vehicle continues to display sudden “Engine Power Reduced” warnings while driving at freeway speeds. The car abruptly slows down and limits acceleration, forcing me to pull over and turn the vehicle off and back on to reset it. During these events, the steering wheel becomes extremely difficult to turn, creating a dangerous situation, particularly at high speeds. The vehicle also appears to have ongoing issues with the push-button start/stop system. Although I did not pursue the issue further at the time, I am now seeking to have it properly addressed because the safety risk remains and another family member is currently driving the vehicle. When I recently attempted to verify the recall status, both the Chevrolet website and other sources show no open recalls. However, the symptoms persist exactly as before, I cannot find the little red notices that were sent but I do have a voicemail from someone at Chevy confirming the appointment that I made because of the recall notices. This issue presents a serious safety hazard due to sudden loss of engine power and steering assist on highways. I respectfully request investigation into whether the recall was improperly marked as completed. Furthermore, can you provide me with the full recall and service history on my VIN including closed recalls and warranty repairs? I know recalls do not expire so I’m confused as to why no one wants to help me now. I appreciate your time.

Filed Feb 13, 2026 · Engine · OH

I was driving on the freeway with my kids in the car at 60 mph and without warning I get an engine power reduced message and then my car losing power and starts dropping speeds down to 35 mph within seconds. I have cars speeding up behind me and I can't go any faster than 35 mph on the freeway so I am forced to quickly pull to the side of the freeway before I get hit. This was one of the post scariest situations for me any my children. I had to turn the car off and sit for awhile before I could start it back up and pray it made it home and didn't do it again. It has randonly done this for no rhyme or reason and no codes are showing when it's happening. I have no recalls on my car so this is something I believe Chevy needs to fix before someone gets seriously hurt.

Filed Feb 9, 2026 · Brakes · MI

Hard braking, reduced engine power

Filed Feb 6, 2026 · Engine, Suspension · PA

I was driving and the reduced engine power came on. I almost crashed because I couldn't control the steering

Filed Feb 3, 2026 · Brakes, Engine · NY

The Vacuum pump continues to go out causes code P1101. I have replaced it 4 times and people just in my town are fighting this code for dear life like me! It causes our brakes to barely work and make it completely unsafe to drive as the check engine light goes in and out for MAF sensor. It’s not safe. It needs to be recalled. It doesn’t matter if i buy the most cheapest part or expensive part. It has happened on multiple occasions where i replace it and within 2 months, its back on and does reduced power in the middle of me driving on busy roads. i’ve been almost hit and almost caused multiple accidents because I have to pull over.

Filed Jan 26, 2026 · Engine, Transmission · MA

I was driving along and my car went into a reduced engine power mode. Code came up as the gas pedal sensor.

Filed Oct 8, 2025 · Acceleration, Electrical · FL

Every so often I get an indication of engine power reduced, but every time I go in to get it checked it's off. I have recently just learned through research online that the issue is caused by a certain condition that gives false reading to the electronics. I have contacted GM and GM financial about the recalls on my cars of the same year. I have not been in a wreck but I have had the issue of engine reduced power in the middle of traffic. Cox Chevrolet in Bradenton has turn me away about the issue GM financial is giving me the runaround neither one mention anything about a recall instead I get a estimate $400 /$808.50/1900.41 all to fix ECM as I told the mechanic I was driving with no problem through the day me and the kids at the park when it was time to leave the car sounded like it just didn't have no gas. We was stuck tell 10:45 we waited two hours for the tow truck. I have OnStar and get monthly reports on my car. When the check engine light comes on OnStar has no indication that's why I believe it is the same ECM. I was told by Chevrolet Maher service manager of St Pete to get my car off their lot as I said before I got a estimate of 400 that went up to 800 and all I did was ask why

Filed Sep 26, 2025 · Engine, Transmission · TX

Multiple components and/or system failures/malfunctions, exact cause is unknown. Vehicle is available for inspection upon request. Safety risks include engine power reduction issues that result in unexpected deceleration, and/or sudden/dangerous loss of power/acceleration. Problem has not been reproduced or confirmed by a dealer or independent service center. Vehicle component has not been inspected by the manufacturer, police, insurance, representatives, or any others other than diagnostic trouble code testing at O’Reilly auto parts due to illuminated check engine light. Vehicle displays error messages “engine power reduced,” while driving and/or idle, and “shift to park” when vehicle has already been shifted into park. No obvious symptoms of the problem prior to failure, unknown when first appeared. Vehicle-2018 Chevrolet Malibu LT L4-1.5L 1490cc 91ci GAS DI Turbocharged vin T LFV-4 valve DOHC (Mileage-145000). Primary Powertrain Diagnostic Trouble Code “P0014 - Exhaust Camshaft Position System Performance (Code P0014 indicates that the Bank 1 Exhaust Camshaft Position timing was advanced beyond limits for a predetermined period of time),” with additional Powertrain Diagnostic Trouble Codes “P0011 - Intake Camshaft Position System Performance,” and “P1101 - Intake Air Flow System Performance.” Also receiving ABS Diagnostic Trouble Code “U0422-71 - Invalid Data Received From Body Control Module - Invalid Data.” Suggested solutions included “Replace Variable Camshaft Timing (VCT) Solenoid,” and “Replace Variable Valve Timing (VVT) Solenoid.” Believed to be related to the federal safety agency ID numbers 11643630, 11586483, 11581989, 11569471, 11568501, 11565871, 11564692, 11635526, 11457416, 11420146, 11416774, 11325303, 11561528, 11559451, 11555493, and approximately 30 other related the federal safety agency ID Numbers for same error message(s), and/or problem code(s), the federal safety agency Campaign Number 19V642, the federal safety agency Campaign Number 19V642000, GM Special Coverage Number N182188250, and GM Recall Number N192221960.

Filed Aug 4, 2025 · Engine · GA

Engine Reduced Power Light on dash. Vehicle stalling