2018 CHEVROLET MALIBU Engine Problems

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...

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

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.

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

Engine power reduced car shuts off and will not start

The contact owns a 2018 Chevrolet Malibu. The contact stated that while coming to a stop, the brake pedal suddenly became inoperable. There was no warning light illuminated. The contact stated that excessive force was required to depress the brake pedal. The contact stated that the brake pedal went to the floorboard while stopping the vehicle. The contact then stated that after pulling into a parking lot, the contact attempted to restart the vehicle; however, the vehicle failed to start with the check engine warning light illuminated. The vehicle was taken to an independent mechanic, but was not diagnosed or repaired. The dealer was contacted, but the vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 111,000.

The contact owns a 2018 Chevrolet Malibu. The contact stated that there was a strong fuel odor coming from the vehicle. The contact stated that the engine was difficult to turn over. The TPMS warning light was illuminated. The vehicle was taken to an independent mechanic who determined that the fuel injectors were leaking. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was 123,074.

The back up camera cuts out while backing up. The lines vanish and leave only the picture. The check engine light comes on with the throttle body being the culprit.

I get a engine power reduced warning and check engine light is on for 3 start cycles and goes away. Auto Start/Stop after stopping, lights flicker and power is slow to come back on upon auto start and I get a power steering reduced warning.,

Purchased a car for financing from Barret Motors and 2300 Lakeview PKWY, Rowlett, TX and as soon as I drove it off the lot on [XXX] the engine light popped on. I immediately called and was told to just take it to Chevy/GMC for servicing but was not told why, but just because the engine light was on I was told to go. I couldn’t take an appointment asap because I just started a new job which they also knew. The car has had a recall since 09-06-19 for an engine control module. Which is a serious issue and this car never had it completed and sold me a car with possible engine issue and did not inform there’s a recall on the vehicle for almost 5 years now. I took the car to get serviced at Chevy for the recall on 09/09/2025 and now I am facing multiple issues...

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...

Engine Reduced Power Light on dash. Vehicle stalling

!Engine Power is Reduced

The contact owns a 2018 Chevrolet Malibu. The contact stated that the vehicle failed to start. There were no warning lights illuminated. The vehicle was towed to the local dealer, where it was diagnosed with a failure of the battery and fuel pump. The contact was informed that the ground wire and fuel tank needed to be replaced. The dealer informed the contact about a recall on the malfunctioning ECM. The vehicle was repaired, but the failure recurred. The manufacturer was contacted, but no assistance was provided. The failure mileage was approximately 50,206.

I have searched the prior recalls and I’m having the same problem that were said to be fixed. I would like the car check again for the recalls that said to be fixed and checked for all reacalls . The car turns of unexpected without warning . At random times the low power mode is always on and when I push down in the pedal it doesn’t respond well at all . I have invested countless money into fixing issues with this car .

The contact owns a 2018 Chevrolet Malibu. The contact stated while driving at an undisclosed speed, the check engine and the turbo charger warning lights illuminated. The accelerator pedal was depressed; however, the vehicle failed to accelerate as intended. The vehicle was taken to an independent mechanic where it was diagnosed with turbo charger failure. The contact was informed that the turbo charger needed to be replaced. The vehicle was not repaired. The dealer was made aware of the failure but provided no assistance. The contact was instructed to schedule an appointment for diagnostic testing and provided the cost for the diagnostic test. The contact referenced an unknown recall; however, the VIN was not included. The manufacturer was made aware of the failure. The contact was advised to contact the NHTSA Hotline to report the failure. The failure mileage was approximately 140,741.

The contact owns a 2018 Chevrolet Malibu. The contact stated that the messages "Engine Power Reduced", "Shift to Park", and an unknown message were displayed intermittently. The contact stated that while her daughter was driving approximately 40 MPH and making a turn, the vehicle stalled. The driver was able to pull over to the side of the road. The vehicle failed to restart and was pushed to the residence. The vehicle was then towed to the dealer, where it was diagnosed and determined that the engine needed to be replaced. The vehicle was not repaired and was towed back to the residence. The manufacturer was not notified of the failure. The failure mileage was unknown.

loud knocking or banging noises, the check engine light turning on and/or other driving performance issues, such as reduced propulsion cranksaft

The contact owns a 2018 Chevrolet Malibu. The contact stated that while driving at various speeds, several unknown warning lights were flashing on the instrument panel. The vehicle was taken to a dealer where a diagnostic test was performed, and the contact was informed that there was no oil in the vehicle. The contact refuted the mechanics findings and had the vehicle towed back to the residence. The contact then stated that while driving at 50 MPH, the vehicle lost power with the message "Engine Power Reduced" displayed. The contact pulled over to the shoulder and turned off the vehicle. After restarting the vehicle, the vehicle hesitated while depressing the accelerator pedal, and the failure reoccurred. Despite the failure, the contact was able to drive the vehicle back to the residence. The manufacturer was notified of the failure and the contact was informed that there was a warranty on the...

I was going about 75 mph on the express way with one lane open due to construction. My car started losing power.I heard the chime and upon the dashboard were the words power reduced. My car slowed down in a matter of seconds to around 45 mph. A 18 wheeler was trailing behind me. I quickly jumped in the emergency lane to my right and took the next exit while riding the emergency lane. I shut the car off at the gas station, sat there for about 10 minutes, restarting my car helped temporarily. I was 3 hours away from home and had to drive back unknowingly if I will make it or not. I reached out to Chevrolet and was told to bring it in and leave it but they had no loaner cars for anyone at that time. I have replaced 2 sensors and now my start /stop...

The contact owns a 2018 Chevrolet Malibu. The contact stated that while the vehicle was parked, the contact noticed a gasoline odor coming from the vehicle. There was no warning light illuminated. The vehicle was towed to the dealer, where it was diagnosed that the injector seals had failed and needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 165,660.

The contact owns a 2018 Chevrolet Malibu. The contact stated that while driving at an undisclosed speed, the check engine warning light illuminated. The “Engine Power Reduced” message was displayed. The contact stated that the vehicle lost motive power. While driving 70 MPH, the vehicle decelerated to 45 MPH unintendedly. The vehicle was previously repaired under NHTSA Campaign Number: 19V642000 (ELECTRICAL SYSTEM, FUEL SYSTEM, GASOLINE, ENGINE). The local dealer was contacted and provided the contact with an estimate for a diagnostic test. The vehicle was not diagnosed or repaired. The manufacturer was contacted, but no additional assistance was provided. The failure mileage was approximately 186,000.

The contact owns a 2018 Chevrolet Malibu. The contact stated that while on a trip and traveling at high altitudes, the check engine warning light was displayed on the instrument panel. The contact used a code reader which showed that the barometric pressure sensor was defective. Once the contact returned home, the mass air flow sensor was replaced. The following year while traveling in the same region at high altitude levels, the failure recurred. The contact also stated that the engine booster had started to fail due to ice accumulation in the charge air cooler (CAC), which restricted airflow. As a result of the failure, the vehicle failed to accelerate above 25 MPH. Upon investigation, the contact discovered Technical Service Bulletin No: 18-NA-069; which the contact linked to the failure. The dealer was notified of the failure, but the contact was informed that the vehicle was out of warranty. The...

ENGINE POWER REDUCED light keeps coming on while driving and the car stalls and won't go over 20mph. Several repairs later and it is still happening almost daily. It has nearly caused an accident several times. This needs to be fixed and a recall for the issue needs to be issued by Chevy. With this many people experiencing this problem, why isn't Chevy obligated to address the issue?

I repeatedly get a “reduced power to engine” alert on my dash which causes my car to decelerate and I lose my power steering. This last time, the alert popped up on my dash, my car decelerated, and then my brakes would not work. I could not push the brake down to stop my car and ended up in a ditch. My brakes are now hard and I cannot start my car because of it. I have already had the recall for this issue fixed in the past but this will be the 3rd time I have brought my vehicle in for the same problem. I had diagnostic codes ran on my car soon after the accident happened and have attached the pictures to this form.

The contact owns a 2018 Chevrolet Malibu. The contact stated while coming to a complete stop, the engine auto Start/Stop system engaged, causing the engine to shut off; however, the electrical system then became inoperable. The contact stated that upon depressing the accelerator pedal to resume driving, the vehicle failed to respond as needed. Additionally, the contact stated that while coming to a stop, the vehicle failed to stop immediately and rolled to a stop. The stabili-trak and electronic stability control warning lights were illuminated. A message advising to open and to close the windows was displayed. The contact stated that the check engine warning light was illuminated. The vehicle was taken to AutoZone, where it was diagnosed that there were debris in the throttle. The contact was advised to drive at high speeds on the highway to correct the failure. The contact followed the instructions; however, the failure persisted....

Reduced engine power message pops up when I’m driving at 45 or lower speed. First time this happened was about 4 months ago, and couldn’t drive faster than 30 mph. After starting my vehicle a couple of times the message goes away. This reduced engine power message is almost a daily thing, but now it doesn’t affect my speed anymore, I can go at 65 mph and even with that warning light on.

When parking it says shift to park even when I’m already in park. The dealer says it’s the shifter however after seeing numerous other vehicles with this issue I believe it’s electrical

While driving th vehicle the component that ruptured was the vehicles vacuum brake booster pump which connected directly to the engine. The ruptured caused shards of metal to be launched into the engine resulting in no brake power and needs an engine swap. There was a recall on this model vehicle for the Pedal sensor malfunction that results in the cars engine going into a reduced power mode abruptly and suddenly while driving. This malfunction has occurred on this vehicle and I was not aware of this vehicle models recall history but it stated that the recall was successfully closed out in 2020. I purchased my 2018 Chevy Malibu in the year 2021 and the issue still persist. I am not confident that the recall on this vehicle was either fully completed or successfully fixed before purchasing. The car is now at the dealer and the repair team explains the...

Vehicle suddenly went into reduced engine power mode and nearly caused a crash. We pulled off to the side of the highway. Turned the car off and waited for about 5 minutes with our small children in the back seat. Restarted the car and check engine light remains on but the reduced engine power warning turned off. This just happened today and have not been to the dealership. Hoping Chevy recognizes this safety issue and issues a recall as many others have reported the same issue.

The contact owns a 2018 Chevrolet Malibu. The contact stated while driving approximately 60 MPH, the vehicle stalled. The contact stated there was no warning light illuminated. The contact stated that the vehicle was left on the side of the roadway. The contact called the dealer where the vehicle was purchased and was advised that he had to pay to have the vehicle towed. The vehicle was not taken to the dealer or independent mechanic. The vehicle was not diagnosed or repaired. The contact was aware of an open recall on the vehicle, NHTSA Campaign Number: 19V642000 (Electrical System, Fuel System, Gasoline, Engine). The failure mileage was unknown.

When putting my vehicle in park to turn off the car, a warning light comes on to put vehicle into park. The vehicle is already in park and am unable to turn off the vehicle. In order to turn off the engine I must repeatedly turn it on and off and hit the gear shifter multiple times. This problem is becoming more and more frequent. I see numerous other 2018 Malibus in the complaint section reporting the same issue. Come on Chevrolet fix this problem!

REDUCED POWER TO ENGINE . Previously had recall for this issue, which was replaced by Chevy service center. About a year later I had the same problem but had to pay out of pocket because there were no active recalls on the issue. As of today, I am receiving the same “REDUCED POWER TO ENGINE” error and check engine light keeps coming on. This happens randomly but frequently almost every single day. Error will shut off after restarting car and then happens again not long after. I’ve had this issue with multiple Chevy Malibus that I have owed and there is currently a class action lawsuit against GM for this exact issue.

Car hesitant to crank, once the Start/ stop button is pushed, the car will start, run smooth for a second or two then start to shake and putter like it’s not getting fuel and loses it power and cuts off. I have to go through this process 5/6 times before the car will stay crunk. While driving Car will out the blue say reduced engine power and acts as if it does not want to pull or it is losing power! The car also has the eco saving feature where it cuts off at every stop and there is not an option be turned off and car is hesitant to start back up after it cuts off. Car is now starting to smoke from the tailpipe. The VVT intake and exhaust solienoids have oil getting into them and the PCV valve is about to crack open. The car throws codes...

Driving normal. Upon application of brakes, brake pedal became stiff and brakes did not function normal. Had to apply immense pressure to stop and it sounded like brakes kept locking up. Vacuum pump that supplies vacuum for engine with turbo to function, along with the brake booster to be able to apply normal braking power, was destroyed. The inside of the vacuum pump is in pieces and part of the bushing that connects into the engine was broken. Caused by faulty vacuum pump, or faulty cam shaft. If this had happened while in traffic, it is likely a crash would have happened. Damage caused to the vacuum pump resulted in metal pieces in the engine block as well.

Since I got the car, if I let it go in auto stop, it has a hard time accelerating when I push the gas. It has gotten worse and now it has a hard time accelerating in general. When I push the gas it sounds really loud like it’s struggling to go. I realized this is a safety issue for me and others when my car wasn’t going at the light of a busy intersection, or when I’m getting onto a highway and my car isn’t picking up speed. This makes it scary for people already on the highway as Iam causing them to brake unexpectedly. Every time my check engine light comes on I take it to the dealership. It’s been taken in for repairs multiple times but this issue still keeps coming back.

Engine power reduced indicated on dash and engine light came on while i was driving

The contact owns a 2018 Chevrolet Malibu. The contact stated while operating the vehicle, the message "Engine Power Reduced" was displayed and the vehicle would not properly accelerate above 30 MPH. Additionally, while depressing the brake pedal, the vehicle failed to immediately stop, and the pedal was firm when depressed. The vehicle was later towed to the local dealer. The cause of the failure was unknown. The manufacturer was not yet notified of the failure. The failure mileage was 50,000.

The contact owns a 2018 Chevrolet Malibu. The contact stated while driving at approximately 70 MPH, the vehicle started losing motive power with an unknown engine warning light illuminated. The contact stated that the engine power was reduced. The contact depressed the accelerator pedal; however, the vehicle failed to respond. The contact stated that the vehicle decelerated to approximately 15 MPH and the vehicle stalled. The contact stated that the vehicle lost power steering and braking functionality. The contact was able to stop the vehicle. The contact attempted several times to restart the vehicle however, the vehicle was unable to be restarted. The contact stated there was an abnormally strong odor of gasoline in the cabin of the vehicle. The contact opened the hood, and the odor of gasoline was very strong. The contact looked underneath the vehicle and saw gasoline in a puddle underneath the vehicle. The contact stated...

Saturday morning this is now the 3rd time it's been fixed and safe to drive. Once by the dealership in Baltimore Towson area. Check engine light came on I ran diagnostic I bought at the store to get the codes come to find out class actions for wrongful death because company knew about it. As I also see hundreds of he same complaints here. My wife on [XXX] Baltimore MD at the merge. She went from 60mph to 35mph. Then the car shut off with zero control of steering. Once in neutral she slightly touch the brakes which let it start up. Thank God no one was killed we have 2 beautiful 6 n 7 yr old girls what would I tell them. This needs addressed it happens after the batt needs changed I know 4 other owners 1 had just got one that's what triggered his same codes problems....

Engine Power Reduced Defect in Chevy Malibu Vehicles. Had the "engine power reduced" message show up countless times.

Check Engine Light constantly comes on . Pedal position sensor is faulty. engine power reduced pops up

While driving on highway, check engine light came on as well as message saying "Engine power reduced". Car immediately decelerated on the highway and brakes pedal became rock hard and unable to press.

The contact owns a 2018 Chevrolet Malibu. The contact stated while driving approximately 65 MHP, the message "Engine Power Reduced" was displayed and the vehicle decelerated to 30 MPH. The contact stated that the speed would no longer exceed 30 MPH. The cause of the failure was not yet determined. The manufacturer was notified of the failure, but no assistance was offered. The local dealer was not contacted. The contact stated that the failure had also previously occurred but after taking the vehicle to the local dealer no cause of the failure was found. The failure mileage was 110,653.

Vehicle will not stay started will stop when ever even while driving. I haven’t driven the car in 8 months because it’s not safe.

Transmission Surge Accumulator System Performance. The car fails to accelerate once it comes to a complete stop, traffic lights, etc. The car will rev up to 5000 RPMs but will not reach 10 mph. This causes problems when driving and I was almost hit on several occasions (more than 8 times) on my drive home to be safe again. The car was taken to the dealership and was reported to have been fixed, after paying a $100 deductible, but only ran properly for one day. Again, I was almost hit 5 times while driving back home, after the repair was made. The check engine light came on after the car presented issues, as I was out running errands, the car was losing power and was not performing well. About 20 minutes after the initial issue, the check engine light came on. I took the car to Auto Zone where they...

The contact owns a 2018 Chevrolet Malibu. The contact stated that a "shift to park turn the vehicle off" message was displayed while the vehicle was in the park position. While driving at unknown speeds, the vehicle stalled. The steering wheel was tight. After slowing down, the driver depressed the start/stop button, and the vehicle shut off and restarted. The vehicle was randomly shut down. After waiting, the vehicle restarted. While depressing the brake pedal, there was an abnormal, unidentifiable noise detected, and the vehicle came to a sudden halt. While driving at 55 mph, the vehicle suddenly stopped, and she hit her head on the steering wheel but medical attention was not provided. The vehicle was pulsating while driving. There was a sound of water going through the vehicle. The vehicle was slow to accelerate and then moved violently. All the instrument warning lights were illuminated. The vehicle was...

Vacuum Booster Pump failed while driving on the highway with my girlfriend and her small child in the car and this common problem for this specific Chevrolet motor and endangered our lives significantly. Over 500 complaints on NHTSA website. No recalls to date. $4,000 damage. Filed official complaint and requested that Chevrolet cover the costs.

Service Stabilitrak warning will pop up on my dash. The car loses power. Push on the gas and it sputters. Had it serviced by GMC 2 years ago and now it is happening again. More frequent in colder weather. There are thousands of reddit posts about this same issue from other 2018 Chevy Malibu owners. GMC refuses to acknowledge it is a quality or performance issue on their end.

While driving, my car’s dash suddenly showed a warning message that state “engine power reduced”. I was driving around 45mph at the time of the incident.