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really awful
Crashes / Fires:
3 / 1
Injuries / Deaths:
3 / 0
Average Mileage:
63,509 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 5 of 5)

« Read the previous 20 complaints

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

problem #1

Apr 102012


  • 40,000 miles
I have a Chevy Impala, 2011, and a month or so after buying it the "service stabilitrak" light came on. Before I could get it into a shop, it went off. It came on again yesterday and my engine power all but shut down, I was trying to get through an intersection and thought I wouldn't make it. After researching, I see that Chevy has had numerous issues with this. Why are they not repairing the problem? this is a huge safety issue for drivers.

- Memphis, TN, USA

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