655 of the 15,232 complaints filed about the Chevrolet Impala are about the throttle and cruise control — 4% of everything owners reported. The worst model year for it is 2009.
655
Complaints
4%
Share of all complaints
42
Crashes
2
Fires
VEHICLE SPEED CONTROL
Cars acceleration causes me to be unable to pick up speed it decelerates up hills small or latg ramps cats constantly fly pass to avoid a multi car pile up it’s very dangerous!
NHTSA complaint #11702052 — an unverified report by a vehicle owner.
VEHICLE SPEED CONTROL
I previously owned a 2011 Buick Regal and now have a 2014 Chevy Impala. Both vehicles have had a Stabilitrack warning come up. Both vehicles experienced the same issue. The car seemed to jerk, lag in speed, cannot accelerate over 40mph. The Regal was diagnosed with an electrical/wiring issue. The Impala was diagnosed with a failed Transmission Control Module. We now have a 2016 Impala and the same issue and warning lights have appeared. That’s 3 vehicles we’ve owned from GMC with the exact same issue. This can’t be a coincidence and should be looked into. There are hundreds, if not thousands, of more consumers on forums experiencing the exact same issue. This should be recalled! Imagine the possibilities of danger this can cause when on the interstate and can’t accelerate over 40mph.
NHTSA complaint #11695515 — an unverified report by a vehicle owner.
VEHICLE SPEED CONTROL
I bought a used car as is for $6700.00 and was told that the car was nothing wrong with it but within the first month 07/02/25 the car has been to 3 different shops and in the shop 5 different times all due to brake problems since I bought the car I have had to replace both front calipers and rotors brake pads wheel bearings and on the back both brake pads plus new tires and it's still not fixed the ABS traction and stability lights are on i could of caused a wreck I only drive it to the store with the money I had paid for the car putting it in a shop I shouldn't of had to do they sold me a dangerous car
NHTSA complaint #11689600 — an unverified report by a vehicle owner.
VEHICLE SPEED CONTROL
I have push to start car. On my lunch i starting my car and I immediately notice the rpm went to 2500, which is high and it went up to 3000 and then the warning light flashed stability track error and check engine and swerving light I took a pic. I turn car off and wait a few min turned car back on and it was fine. No errors drove to get lunch and back no issues. Then on leaving work s ame thing happened but the error didn't go away. I was able to shift out of gear. Hard knocking, gear shifter light all white no clue what gear it was in I moved to another parking spot but was slow moving very delayed. Parked and now waiting for tow truck
NHTSA complaint #11656648 — an unverified report by a vehicle owner.
VEHICLE SPEED CONTROL
Side detection system failure. I have had 3 harness replacements on driver side. 2 harness replacements on passenger side, and a module replacement just 2 years ago. This failure causes my instrumentation to shut off, turn signals not work, and shuts off cruise control when in use. I have read outher more extreme cases like engine compartment fires or car shutting off while driving. I believe all these should be considered safety issues. I have owned this vehicle since new.
NHTSA complaint #11653031 — an unverified report by a vehicle owner.
VEHICLE SPEED CONTROL
I started my vehicle in the morning to let it warm up. I come back out to get myself and my son in the vehicle to go to work and take him to school. My dash upon entry had a check engine light on, and the message it displayed was "engine power reduced." I put my car into reverse, having no choice but to drive it and the traction control went out. My father in law pulled the code and it said something about the accelerator sensor. This is a known issue and recall in other models and I wanted to report it is also happening in my model.
NHTSA complaint #11620617 — an unverified report by a vehicle owner.
VEHICLE SPEED CONTROL
After getting into my parked car and starting it, the Stabilitrak warning message came on my display. This is the 2nd tike that this occurred. The first time it occured, my mechanic diagnosed it as a failed throttle body, which I replaced myself, (easy removal/installation). Now, a couple of months later, it occurred again. After doing some online research, it seems as though the position sensor on the accelerator pedal may be at fault. A lot, if not most cars today have a "fly-by-wire" system which replaces cables and such with sensors and motors. So, the accelerator, (gas), pedal controls the movement of the butterfly valve on the throttle body by sending a signal to the motor. I'm going to replace that... about $140 or so. I saw a YouTube video and the removal/installation is fairly easy. A lot of people are having this issue; maybe a recall is needed?
NHTSA complaint #11611932 — an unverified report by a vehicle owner.
VEHICLE SPEED CONTROL
The contact owns a 2018 Chevrolet Impala. The contact stated while driving 45 MPH, the accelerator pedal was depressed but was inoperable. The contact stated that the vehicle failed to accelerate as intended. There was no warning light illuminated. The vehicle was taken to an independent mechanic and a dealer and was diagnosed with transmission failure. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 98,000.
NHTSA complaint #11611424 — an unverified report by a vehicle owner.
VEHICLE SPEED CONTROL
UNKNOWN but I believe the sealed transmission is malfunctioning
NHTSA complaint #11595204 — an unverified report by a vehicle owner.
VEHICLE SPEED CONTROL
When at a stop and turning left it makes a grinding noise with hesitation in movement. The ABS and traction control light comes on. When researching this, there are millions of these cars with the same thing. I have taken to 3 mechanics and no one can fix the problem.
NHTSA complaint #11589933 — an unverified report by a vehicle owner.
VEHICLE SPEED CONTROL
The contact owns a 2009 Chevrolet Impala. The contact stated that after starting the vehicle and shifting to reverse, the check engine warning light illuminated. The contact continued to reverse the vehicle and felt a pulling sensation. The "Traction Control" failure light illuminated. The contact decided to move forward and park the vehicle. After several hours, the contact restarted the vehicle and the check engine warning light remained illuminated. The vehicle was then able to be driven. The failure occurred several times after the tires were changed. The contact linked the failure to NHTSA ID Number: 10090054 (Vehicle Speed Control, Engine). The vehicle was taken to the dealer where it was diagnosed that the accelerator pedal failed and needed to be replaced. The vehicle had been repaired. The vehicle was not returned to the dealer when the failure recurred. The manufacturer was made aware of the failure and it was confirmed that the vehicle was past the 10-year coverage for NHTSA ID Number: 10090054 (Vehicle Speed Control, Engine). The failure mileage was 65,510.
NHTSA complaint #11563810 — an unverified report by a vehicle owner.
VEHICLE SPEED CONTROL
There is a current recall on Chevy impalas with the trans mod control system but my vin number is not apart of the recall but my car is doing everything that recalls states. The recall number is 14V614000. The recall date 10-01-2014. My vehicle is 2014 and I have only had it for 2 years.
NHTSA complaint #11530131 — an unverified report by a vehicle owner.
VEHICLE SPEED CONTROL:THROTTLE:THROTTLE POSITION SENSOR (TPS)
The contact owns a 2009 Chevrolet Impala. The contact stated that while driving at an undisclosed speed on separate occasions, the messages “Reduce Engine Power” and "Service Traction Control" were displayed on the instrument cluster, and the check engine warning light was illuminated. Additionally, the contact stated that the failure reoccurred while driving on a bumpy road surface and while turning the steering wheel. The vehicle was taken to an independent mechanic, where it was diagnosed that the throttle position sensor had failed and needed to be replaced. The vehicle was repaired; however, the failure recurred. The contact stated that her father used an OBD reader and retrieved codes indicating that the throttle position sensor was faulty and needed to be replaced. The vehicle was repaired; however, the failure persisted. The contact stated that while driving at an undisclosed speed, the vehicle decelerated unintendedly. The vehicle was taken to an unknown dealer, who informed the contact that the VIN was not included in a recall. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 169,000.
NHTSA complaint #11528363 — an unverified report by a vehicle owner.
VEHICLE SPEED CONTROL
While driving at 70 mph my car just shut off. The radio and lights stayed on. The oil and battery light came on before it just shut down. Steering locked up. When safely to side, and turned key off it starts right back up, but now traction system is off. Has gas and nothing is broken.
NHTSA complaint #11527526 — an unverified report by a vehicle owner.
VEHICLE SPEED CONTROL
While driving the car it would pop up a message saying “ENGINE POWER REDUCED”. Today while driving it home it popped up with a message saying “STARTING DISABLED, SERVICE THROTTLE” and then the car wouldn’t drive and I had to pull over on the side of the road. For months now when I drive and accelerate at times the car would almost grind. I believe it has to do with the traction control or the transmission.
NHTSA complaint #11510035 — an unverified report by a vehicle owner.
VEHICLE SPEED CONTROL
My 2013 Impala Ltz Service Traction Control, Service Stabilitrack, Engine power reduced problem lights came on the dash. Almost had an accident I want to know why the 2013 model of impala has not had any recalls as the 2010 models with same issues..... My vehicle has the same major issue and need to be addressed & Recalled...... The 2013 Chevrolet impala LTZ Need to be Recalled to fix this issue for the safety of my family and the families on the road and Highways........ I can't express more the need of recall for my vehicle!!!!! I attached documents on the pervious 2010 model recall that had the same issues.... If you think Chevrolet dealership fixed the problem on the 2013 impala model it didn't work cause I have same issues!!!!!
NHTSA complaint #11508808 — an unverified report by a vehicle owner.
VEHICLE SPEED CONTROL
Accelator keeps getting stuck at traffic lights and while driving
NHTSA complaint #11502668 — an unverified report by a vehicle owner.
VEHICLE SPEED CONTROL
The 2014 Chevy Impala is dangerous. When the rocker arm control valve and related parts fail or the camshaft solenoids and sensors fail the car will drive rough and eventually just cut off in the middle of traffic highway or residential. This is what it did on me, putting me in a very dangerous position. The economic loss is still devastating financially as all 2.5 and 3.6 engines arent covered by GM special warranty but they should be all covered. My VIN number was not included when it should be.
NHTSA complaint #11501954 — an unverified report by a vehicle owner.
VEHICLE SPEED CONTROL
My car has started slowing down abruptly and displaying Engine Power has been Reduced at random times, but has become more frequent. I have had an independent service center tell me it was the throttle body, so they replaced it. That didn't fix it, so they replaced the accelerator pedal/sensor. It still is happening and when on the interstate, it is so dangerous to slow down with no warning because you can get rear ended quite easily. This first started August 2021 when my wife and I started on a vacation and had to turn around and go home and is still happening, only more frequent. This past Saturday 7/16, I was traveling on Interstate 77 and the engine power kept cutting down about every 10 minutes, so I had to pull over and cut the engine off for a while until it reset. I can't trust it to go anywhere.
NHTSA complaint #11474660 — an unverified report by a vehicle owner.
VEHICLE SPEED CONTROL
Check engine light Code p2138 Change the throttle pedal position sensor the next day the car dropped down to 5 to 10 mph information center said engine safety been reduced to 5 to 10 mph plus my traction control light came on then information center said service traction control put my old throttle pedal position sensor back on and it turn traction control light out and the car went back to driving normal don't know how long its going to last before it goes back to 5 to 10 mph and the information center says engine decelerate to 5 to 10 mph.was on highway in Texas had to get over on shoulder quick car just slow down quick and pedal was to floor. Also keep failing state inspection due to failed OBDII test ( see vir).
NHTSA complaint #11474438 — an unverified report by a vehicle owner.