2017 Chevrolet Malibu Speed Control & Cruise Problems

The Reduce Power to Engine keeps happening. It shuts my car down and lights up the traction control light, check engine light and its a serious hazard because I travel highway to and from work and its very dangerous when you loose power to your vehicle at high rates of speed. Also my emissions is bad due to a supposed fixed recall for the catalytic converter.

While driving at highway speeds, my vehicle suddenly experienced a loss of engine power and reduced acceleration. The traction control light and engine light illuminated, and a “Reduced Engine Power” message appeared. The vehicle would not respond to the accelerator, creating a serious safety hazard. This occurred shortly after authorized dealer service involving the PCV system and related components. The vehicle did not have this issue prior to dealer service. I returned the vehicle to the dealer, and they stated they could not replicate the issue. The sudden loss of power could have resulted in a serious accident. I believe this may be related to improper dealer service, disturbed electrical connectors, or throttle body/engine management components. I am reporting this as a safety concern. I also would like to mention this safety issue has occurred now multiple times with my car on multiple separate occasions with the last prior occurrence being 12/20/2025.

The car smells strongly of gas. And has a problem accelerating. Check engine light came on and I got a code p1101 which is a code for the MAF SENSOR. This is not the first time that this has happened. It happened less than a year ago maybe 9-10 months ago. I don’t drive the car in fear of it catching a fire. The car has stalled before in the middle of a turn. I had to turn the car off and turn it back on. I called onstar who have no idea what was wrong with it.

I was driving my car on the highway doing 65 mph when all of a sudden my car started rapidly jerking losing the power to accelerate and entering “limp mode“ there was multiple cars behind me when my car lost the power to accelerate. I was in the far left lane and couldn’t even go higher than 7 miles an hour and had to cross across three lanes at 7 mph on a 65mph highway to pull over. I had my children in the car and almost caused a huge accident dude to this issue. The issue in hand is the vacuum pump. It completely shattered in my engine, causing severe engine damage. And it caused my brake pedal to become hard as a rock. I couldn’t break without using my emergency break. I had no brake power at all. My car had to be towed.

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.

I was driving in my neighborhood I tried to park at my house and my car wouldn’t stop I had to step down on my break hard for it to finally stop my vacuum pump broke into pieces and made my timing chain break

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.

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)

My car displayed "reduced engine power" and slowed down on the highway while I was doing 65mph. My car would not accelerate past 20mph. There were no issues with my vehicle, and this happened out of nowhere. It caused a lot of other drivers to have to swerve around me, and drastically reduce their speeds as well in order to avoid collision. This was highly unsafe and now I can not safely drive my own car.

Check engine light came on. Display stated that the engine will run at reduced power which meant we had to Limp home at 15 MPH which put us in a dangerous situation. I read the code and it was P2122. Throttle/Pedal Position Sensor/Switch “D” Circuit Low Input. This indicates that there is a problem with the accelerator pedal. I replaced the pedal myself at a cost of $114.00. I eventually found a technical service bulletin that admitted that there is a problem with the accelerator pedal on 2016 to 2018 GM vehicles and there was a program that was replacing the pedal until 2020. I called GM customer service and they said there was nothing they would do about it since the program expired in 2020.

My car has reduce engine speed. I’m driving on the highway and out of nowhere the car shots down and a symbol appears on my dashboard that says Reduce Engine Speed. Literally the car slows down to a minimal speed until I can’t drive anymore. I have to stop and turn off the car for 5 minutes until I can turn it on and drive to my destination in a reduce speed.

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.

2017 Chevy Malibu over 15 times this happens since we owned buying it brand new it has "Reduced Engine Power" error come on and the car can't accelerate over 30 miles per hour. This is a continued problem all the time and very dangerous when we are on the tollway that has a 70-mph speed limit, and you can't get the car to over 30 mph. This same problem happens on our 2018 Chevy Malibu over 5 times since we owned it too and it's getting worse! This is extremely dangerous and takes you a long time to get home when you can only go 30 mph or less because of the "Reduced Engine Power" Limit. Same 2017 Chevy Malibu also has the "Shift to Park" Error so we can't shut off the engine because the car won't go into park, you have to back up and keep trying to get the shifter to let you put into park if you're lucky it will finally after many shifting attempts back and forth to get rid of the error so you can shut off the engine to exit your car. GM should be responsible for a recall on these two very important errors that these Chevy Malibu cars are having on both of the problems are very dangerous "Reduced Engine Speed" and "Shift to Park" can't shut off the engine is dangerous.

When l park my car it keeps saying it’s not parked

My check engine light came on and I had reduced power and could not speed up. I have seen other with same problem 2017 chevy Malibu. This needs investigated big time before someone gets hurt. Should be a recall on this.

The check engine light came on and the stabilitrak came on. I went to nearest car mechanic and the mechanic told me it was safe that’s normal and it was safe so I proceeded to goto work the next day. The next day I’m on my way to work and 30 minutes on the highway my check engine light come on this time saying engine power reduced I went from driving 60mph to 20mph with four wheelers speeding pass me . Being far away from home I pulled over side of the highway to not panic. I turned on my hazard lights and proceeded driving and made my way home because I didn’t want to be stranded.

During driving on the highway, the car went into reduced power mode and speed was limited to 30 MPH. This was during driving on highways with 55 MPH or 65 MPH speed limits and could have resulted in an accident. My daughter was driving the car on all 3 occasions which makes this problem even more upsetting. The same part has been replaced 3 times (refer to receipts) relating to the accelerator pedal 3.451 N. This is a MAJOR DEFECT that is reoccurring. NHTSA needs to take action on this safety defect with General Motors for a corrective repair. I see this has been reported before on this website by others. You immediately action on this matter is appreciated.

About 2 years ago I began having issues with my 2017 Chevy Malibu right before I hit my 100k mile extended warranty. The error message "Engine Power Reduced" appeared on the dash while driving on the interstate and my car began rapidly decelerating on its own. I had no where to get off the interstate and pulled over on the side. I shut my car off for a couple minutes, restarted and went on my way for about 30 seconds when it happened again. This continued making my normal 45 minute commute home far longer. I took it into the dealership right away and the replaced the accelerator sensor. Problem solved for just over a year when it happened again in February 2022. The car was no longer in warranty so we took it to our local mechanic who said it was the same issue. We replaced the sensor for a second time. Now, November 2022 and it is happening AGAIN. This is not a cheap repair and is a major safety concern when driving at high speeds and the car decides to rapidly decelerate, not allowing me to drive more that 20mph. I live in Wisconsin where roads are slick in the winter. Losing control of the cars speed is a serious safety concern for myself, anyone in the car with me and those driving behind me. I understand this is a well known issue with the models between 2016-2018 but GM has failed to recall these vehicles. Why? Why is nothing being done about this? 3 times in 2 years is ridiculous and there are thousands of cars that have reported this exact issue. Please help.

The accelerator pedal position sensor failed causing reduced engine power mode. This happened on the highway with the speed limit of 55 which reduced my speed to 20 mph while around other vehicles. This put the safety of myself and my two children at risk because cars behind me didn’t expect a sudden change of speed along with myself. Having no warning is insanely scary. This problem is apparently not a recall on my car but yet I’ve found the gm recall online for Chevy Malibus years 2016-2018. This hasn’t caused an incident yet but I have seen MAJOR complaints and how this is a reoccurring problem which isn’t surprising to me because I had a 2012 Chevy Equinox before this with the SAME issue. Having this happen twice is ridiculous in my opinion. This happened two weeks after I bought the used car from a dealership it only had 59,000 something miles but I am disappointed as to how this is costing me already. This makes me never want Chevy or GM again.

I have taking my car to Chevy 8/2021 twice and now 9/28/22 for what I believe to be throttle body control and accelerator pedal issue. The engine reduce light and check engine lite continues to come on causing my car to lose speed while driving. Chevy keeps telling me its a oil pressure issue now their saying it may be a oil gasket. At this point I feel like there is a lot of complaints of the same issue. I'm hoping someone can look into this further as it's costly and seems to be a chevy issue nation wide. I see there has even been a lawsuit : Jun 9, 2022 — A class action lawsuit against General Motors alleges the company hid a defect in its Chevy Malibu that can cause a sudden loss of power. https://topclassactions.com/lawsuit-settlements/consumer-products/auto-news/chevy-malibu-class-action-alleges-power-defect-cover-up/ I feel like this is very dangerous and I don't want to get hurt or hurt anyone in the process.