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really awful
Crashes / Fires:
3 / 1
Injuries / Deaths:
3 / 0
Average Mileage:
63,905 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2011 Chevrolet Impala engine problems

engine problem

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2011 Chevrolet Impala Owner Comments (Page 4 of 5)

« Read the previous 20 complaints

problem #21

Jan 102013


  • 35,000 miles


The contact owns a 2011 Chevrolet Impala. The contact stated that while driving approximately 35 mph, there was a reduction of engine power with the illumination of the traction control and stability control warning indicators. The failure occurred on icy and dry road surfaces. The vehicle was not diagnosed or repaired. The manufacturer was notified of the problem. The approximate failure mileage was 35,000.

- Duluth, MN, USA

problem #20

Dec 232013


  • 43,400 miles
I started my car after a cold night and immediately got a "service stabilitrak", "engine power reduced", and "service trance ion control" messages. The car had an extremely rough idle and then would not accelerate to more than 25 mph. I returned home and made an appointment at the dealership. Later, I was ready to take the car into the dealer and it started fine with no error messages or check engine light. I called the dealer and they said it must have been a computer error that fixed itself. Well, it's a week later now and I am having the issues again except restarting the engine does not fix it anymore. This is a serious issue and needs to be resolved by GM and not cost the many people experiencing this issue hundreds of dollars to fix!

- Essex, VT, USA

problem #19

Dec 212013


  • 50,000 miles
While driving down the road service traction control reduce engine power and stability control light came on. Car engine lost power and I thought it was going to blow up it made the whole car shake. You shut it off for a few and restart it and its like nothing ever happened. Not to happy about this I have not had the car a year. Guess a person needs to die from this matter before there is a recall on this what a joke. And the worst is Chevy will not cover any of this even if the car is under a warranty.

- Greendale, WI, USA

problem #18

Aug 232013

Impala 6-cyl

  • 52,000 miles


While driving at 60 mph, messages were flashing: Service stabilitrac soon, reduced power to engine, check traction control. Car decelerated to 30 mph on the highway, hard to steer. I pulled off the road, turned it off and waited. Several minutes later it restarted and I was able to drive it home. The engine light and the traction control light still come on. It shifts hard (and it's an automatic transmission). In addition, cruise control will not work during this condition.

- Circleville, OH, USA

problem #17

Nov 242013

Impala 6-cyl

  • 43,110 miles
This is the second time this has happened. Less than a year ago, we received a service stabilitrac/service traction control/engine at reduced power message and speed dropped from 40 mph to 5 mph. We brought it to the Chevrolet dealer and a traction position control sensor was replaced. Today, on 11/24/13, we were driving 15 mph in a parking lot and received the same message resulting in the same problem. This is a safety issue due to the fact that the vehicle essentially stalls out with little to no power and nearly caused a collision at an intersection. When will NHTSA force GM to recall and fix this issue? this is extremely dangerous.

- Durham, NH, USA

problem #16

Sep 122013

Impala 6-cyl

  • miles
On my way to work: On highway all lights came on service traction control, service stabilitrak and engine power is reduced, and my check engine light came on as well.

- Atlanta, GA, USA

problem #15

Aug 252013


  • 68,000 miles


Code P211222 and code C0242 car would not go over 5 mph. Engine light was on. Called onstar. This is the third time this has happened in 15 months. Fixed twice. Spoke with General Motors safety division and [xxx] at General Motors several times. Information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Flushing, MI, USA

problem #14

Aug 222013


  • 50,000 miles
While leaving from work I made a left turn onto a busy highway and my service traction control light, reduce engine power, and check engine light came on. Pulled over and car was wanting to turn off. Turned off car and service traction control light goes off but check engine stays on. Came home googled what could be the cause and see that many Impala owners are having the same trouble...I see a lawsuit happening if GM does not recall this!

- Taft, TX, USA

problem #13

Jun 012013

Impala 6-cyl

  • 65,011 miles
For several weeks, the indicator on my vehicle will alert me "service traction control; reducing engine power". at first I thought this was just a glitch, until it kept happening over and over and over again. There are days when the indicator will go off and remain off for a week or two, but then it will all of a sudden come back on and remain on for a week or so. I get my vehicle serviced regularly. I have contacted GM dealership after dealership, and they have all told me there is nothing they can do. Finally, I asked for the corporate office number (800-462-8782). I called GM's corporate office (reference#: [xxx]) and was told that my powertrain warranty is still good but my bumpertobumper warranty has expired due to the mileage. I advised the representative ([xxx]) that I had googled this information to find out what was going on and this appears to be a known issue with Chevy implala's, and I asked why hasn't GM put out a recall on this issue. She then tells me that I need to pay and get a diagnostic check to determine the actual issue. My question to her is "why should I or any customer have to pay for something that is a reported known issue"" there representative continued to apologize and tell me there was nothing that GM could do because this was not a known issue. I referenced there representative to research for herself ("hl=en&source=hp&Q=what+does+service+traction++control+mean+on+my+Chevy+Impala&gbv=2&oq=what+does+service+traction++control+mean+on+my+Chevy+Impala&gs_L=heirloom-hp.3...734.19328.0.19516. and she continued to tell me there was nothing they could do. Information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Capitol Heights , MD, USA

problem #12

Jul 282013

Impala 6-cyl

  • 71,000 miles
I was driving on the highway at 60 mph when my car began to slow down until it came to a stop. I could do nothing but sit there I did not have enough time to make it to the emergency lane. I could have been killed! the car gave no warning. I received several messages on the dash that stated disabled starter, service throttle, and the check oil light was on. Over the two years that I have had this vehicle I have had to have the transmission replaced and one year later another potential costly repair. Something really needs to be done with the 2011 Chevy Impala's, there is a serious safety issue going on that has not been look at by Chevy.

- Washington, PA, USA

problem #11

Jun 082013

Impala 6-cyl

  • 43,700 miles


When driving, noticed on the freeway, it wasn't smooth at times. The transmission's shifting was pretty rough. No indication of any issues popped up on dashboard. When arriving at a freeway ramp, it felt like I was hydroplaning, but on gravel. Then, noticed when pressing the accelerator, was not going anywhere, but felt like I was in neutral. Was able to pull over and take a look... transmission fluid was fine... nothing popped up on the dashboard. Nothing! the indicators for tires, oil, etc were showing info, but nothing to indicate it had died or if there were any engine issues. Had brought it to the dealership where I had bought the car 11 months ago. The mechanics were saying that they have never seen such an huge transmission failure before. They would have to replace the whole thing.

- Seatac, WA, USA

problem #10

Jun 102012


  • 45,758 miles
This has happened multiple times to my 2011 Impala. I will be driving normally, anywhere from 45 to up to 65 mph, and I will get a warning saying "service stabiltrack, service traction control, engine power reduced". usually I can shut the car off and wait 5 minutes, and the messages will clear, but the check engine light will remain illuminated for the next couple of days, eventually clearing. There needs to be a recall for whatever is causing this, because there are a lot of folks with Impala having this same exact problem. We as the consumer, should not have to pay money out of our pocket, for a problem that Chevrolet caused during the manufacture of this car.

- Baldwyn, MS, USA

problem #9

Feb 152013


  • 62,000 miles
Had the service light and service stabitrak and reduced power come on. Seems to happen a lot during the winter. I have had the gas pedal replaced seemed to help for a week until snowed again but was due to nice weather I have also had to take off throttle body and cleaned with throttle body cleaner. Seemed to do the trick until it snowed again. It is very dangerous when this happens and almost caused a crash. The problem seems to be with the senor but works fine when not wet out or snowing. After looking online seems to be a very common problem with Chevy with them not doing a thing other then wanting to charge me 600 bucks to replace throttle body. Seems like Chevy never wanted to fix this issue due to the fact of alot of other models of Chevy have the same problem going back atleast 4-5 years.

- Buffalo, MN, USA

problem #8

Mar 202013

Impala 6-cyl

  • 48,000 miles
The service stabilitrak light comes on and engine power is reduced. It happened this morning while taking my kids to school...very scary thing when kids are in the car because it just starts losing power & you really cannot drive it like this..

- Sullivan, IN, USA

problem #7

Mar 302013


  • 43,000 miles
Driving 30 mph in a small town. A "binging" noise sounds 3 times and the traction control warning light as well as the check engine light came on. Vehicle messaging system stated that to "service stabilitrak, " "service traction control, " and "engine power reduced. The acceleration was noticeably reduced as well as a significant difference in maintaining speed. Merging onto a highway the cruise control would not kick in when setting speed which made it difficult to manage a 65 mph speed limit.

- Rochester, MN, USA

problem #6

May 212012

Impala 6-cyl

  • 39,567 miles
My wife was driving on the highway and out of the blue the stability control and reduce engine power light came on the message display. There were no weather conditions at the time. This has happened 6 times total. One time it happened as she was warming up the car. All of a sudden it started shaking and she felt as if it was about to take off into space. She turned it off three times - even tried to drive it and move to another parking place and turned if off again before it finally stopped shaking.

- Mosinee, WI, USA

problem #5

Dec 262012

Impala 6-cyl

  • 67,000 miles
My 2011 Impala is reading "service throttle. Reduce engine power" and then proceeds to shut down. Even after replacing accelerator pedal position sensor, vehicle is still reading same errors. This is very dangerous because there is no limitations to when the vehicle shuts off. After extensive research, a lot of people are having the exact same issue and Chevrolet hasn't attempted to do anything about it. Please help!

- Chicago, IL, USA

problem #4

Sep 172012


  • 51,000 miles
The contact owns a 2011 Chevrolet Impala. The contact stated that while driving approximately 65 mph all the warning lights illuminated and indicated that the engine was loosing power. The contact pulled over and waited a few minutes before restarting the vehicle. The vehicle was later taken to a dealer who diagnose that the app sensor and modulator failed and needed to be replaced. The vehicle was repaired for both components. Approximately 1 month later the contact was driving approximately 65 mph and the vehicle started to slow down while he was pressing on the accelerator pedal. After pulling over the vehicle was unable to accelerate but the RPM's were rising. The vehicle was towed to the dealer diagnosed that the transmission failed and needed to be replaced. The vehicle was not repaired. The manufacturer was contacted and they offered no assistance. The failure mileage was approximately 51,000 and the current mileage was approximately 52,000. The VIN was unavailable.

- Orlando , FL, USA

problem #3

Oct 102012

Impala 6-cyl

  • 38,000 miles
I was driving 60-70 miles per hour on the interstate and the engine began to lose power. After a couple of minutes the engine got a sudden boost of power. I was told it is the sensor on the gas pedal that is effecting the engine power and it is not covered by power 100,000 mile warranty.

- Montgomery , AL, USA

problem #2

Feb 012012

Impala 6-cyl

  • 37,562 miles
The contact owns a 2011 Chevrolet Impala. The contact stated that while driving approximately 25 mph the stability track control light, the engine light, and the reduce power light illuminated on the instrument panel. The contact noticed the engine power was reduced while accelerating. The failure occurred while driving at different speeds. The vehicle was taken to the dealer for diagnostic testing. The contact was not aware of the diagnosis. The vehicle was not repaired. The approximate failure mileage was 37,562. Updated11/14/12 updated 11/16/2012

- Montgomery, AL, USA

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