really awful
Crashes / Fires:
3 / 0
Injuries / Deaths:
4 / 0
Average Mileage:
97,976 miles

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problem #124

Jul 212019


  • 130,000 miles
Reduced engine power light comes on intermintently while driving had the throttle body and accelerator pedal replcaed twice after I bought the car with 75000 miles on it. Still the reduced engine power light comes on. Just yesterday I was unable to start my car. Throttle problems light came on in window

- Rochester, NY, USA

problem #123

Jun 292019


  • 119,600 miles
My car just stopped in the middle of the road in heavy traffic of 45 mph. Weather was about 90 degrees F.. message on dash was "starting disabled service throttle." I am lucky not to have been seriously hurt or killed. After pushing it to a side street, it started again and showed "reduced engine power" and went about 20 mph. I saw online this is common problem with many Chevrolet. Why no recall? so dangerous. Repair is estimated at $750.

- Ft Lauderdale, FL, USA

problem #122

Oct 182018


  • 120,000 miles
Takata recall. When vehicle is started a loud screech happen every time vehicle is started, once vehicle is in motion on highway, street, city.and in motion the vehicle starts alarming and lettimg me know in the information widow check tire monitoring system with tire pressure light consistently on then vehicle alarming sounds again to check stability trak and then it alarm S again with the check engine light that the vehicles engine power has been reduced and vehicle is no longer able to pick up speed right away this has been going on sense I purchased it. Also when im making turns the vehicle will alarm about having stability trak serviced

- Racine, WI, USA

problem #121

May 042019


  • 110 miles
Driving on highway @ 60 mph when engine dies with no warning. Dash shows following messages: "engine power reduced" "serivce traction control" "service stabilitrax" power steering and power brakes stop working. When car key is turned off and check engine codes are cleared, the car starts up fine and continues to run smoothly. Luckily I was able to safely stop the car (albeit on the middle of a major highway), turn it off, clear the codes, and start it back up to get out of the way. Same problem happened in January 2018. After this I took it to a Chevy dealer. They said car was covered under "warranty" for this problem and they replaced the throttle body. One month later same problem keeps occurring. Car runs fine but these messages appear about once a month. Typically the engine stays on and is only limited in power. However, occasionally the car will die completely without warning, even on the highway. Had car brought to Chevy dealer. They said they can not fix the problem unless it is currently occurring with the car. They recommended I take the car and bring it back to them when the problem happens again. However, I do not feel safe driving this car knowing the engine could just shut down at any moment and the Chevy specialist themselves do not seem to even have a clue about what could be causing this.

- Malden, MA, USA

problem #120

Mar 012019


  • 220,200 miles
One day I was driving my car home making a right turn and my engine started making noise and was acting as if it was going to cut off. So I parked my car called my mechanic he came over and looked at the car I said it could be a possible rocker arm that has gone in the car or I could have something to do with the check engine light coming on giving me a code for a cam positioning sensor / solenoid. Also when I purchase the car not too long after me driving I noticed there was some noise coming from my back tires. I couldn't figure it out for a while until one day I looked at my tires and noticed that on the inside there was a considerable amount of scraping going on wearing away my tread. It would always seem to happen when I got new tires on the car so I thought maybe the tires were too big for the car but I ordered what the manufactor suggested the tire size should be for the car. So I had a tire specialist look at it and an alignment specialist look at it and they told me that the suspension springs may be causing my issue. They said that I should not have to change the size of my tire for them to fit because the manufacturer specifications are correct and the tires were the right size for the car.

- Wilmington, NC, USA

problem #119

Nov 022015


  • 85,000 miles
The contact owns a 2008 Chevrolet Impala. While attempting to accelerate, the vehicle hesitated and jerked forward. The contact took the vehicle to gregg young Chevrolet (17750 burt St, omaha, ne 68118, (402) 509-3028) twice, but they were unable to diagnose the failure. On one occasion, the contact's vehicle lurched forward and crashed into another vehicle that turned in front of the contact. The crash was a T-bone collision. A police report was filed. The contact and other driver were injured and transported to the hospital for medical attention. The vehicle was towed to huber Cadillac (11102 w Dodge rd, omaha, ne 68154, (402) 496-5400), but the cause of the failure could not be determined. The vehicle was taken to an independent mechanic who replaced the fuel pump, spark plugs, coil, and fuel injector (twice); however, the failure recurred. The failure mileage was 85,000.

- Omaha, NE, USA

problem #118

Feb 282019


  • miles
Very bad knocking noise also electrical fire could've caught on fire

- Las Vegas, NV, USA

problem #117

Jan 312019


  • 151,000 miles
Lights came on dash service throttle, reduced engine power. I was driving down the highway on 8/16/2018 going 55 when the car started to chatter and I struggled to pull over to the side of the road, I almost was rear ended because it was so sudden. I shut the car off and let it sit for a bit then it started and I went on. Today it did it and it still wont start after hours.

- West Liberty, IA, USA

problem #116

Nov 122017


  • miles
Vehicle hesitates throttle body causes car to jerk cut off not pick up speed always idled up speed sensor reads 107 mph when only going 30mph stalls. Almost was rear ended because car shut off in the middle of driving.I have my car regularly serviced and all of a sudden this started happening. My blendoor aculater cause my heat not to sometimes come on and it makes this loud clicking noise. Most if no all Impala have this problem and GM knows about all the things I told you about yet they dont wanna recall the vehicle

- Concord, NC, USA

problem #115

Jan 242019


  • 97,000 miles
While I was driving, the car gave a notice of reduced engine power, then a few miles later, another notice came on service throttle disabling service. And the car shut off! with no warning, and no way to get to safety. If I wasn't in an area that had a shoulder I could get to quickly or if there was any traffic near me, I would be dead! this is incredibly unsafe and is going to get someone killed, if it hasnt already! that has to be some sort of flaw in the programing. If I would have been on the highway, which is where I normally am at that time of day, I would have had no time to react and get to a safe area before the car shut down on me. It also locked up the steering wheel and braking system so I had next to no power. It was incredibly scary. I am just glad that I was driving the car, instead of my elderly mother. She very well may have had a heart attack from the fear. In no way should a car just shut down mid-drive like that! I cant even begin to explain the amount of ways how badly that could go wrong, and this seems to be a common issue with Chevy vehicles and the throttle body. Even if the throttle body is going bad, in no way should your car be programed to just shut off mid-drive, ever. I really hope that is a programing flaw and not intentional, because if that is intentional, you are truly trying to kill people. What is it going to take for Chevy/GM to get the issue fixed" how many people getting killed in unnecessary accidents is it going to take" I pray that myself or my family isn't one of them! please Chevy/GM, get this issue fixed already.

- Hunlock Creek, PA, USA

problem #114

May 152018


  • 80,000 miles
The contact called on behalf of the owner of a 2008 Chevrolet Impala. On several occasions, the vehicle failed to start and the reduced power warning indicator illuminated. Additionally, while driving 55 mph, the vehicle stalled. The contact was unable to restart the vehicle. The contact stated that the failure was intermittent. The vehicle was diagnosed by an independent mechanic and fault code: P-2135 was retrieved. The mechanic replaced the ECM, throttle body, accelerator pedal mechanism, and the wiring harness between the ECM and throttle body; however, the failure recurred. The dealer and manufacturer were not contacted. The approximate failure mileage was 80,000.

- Oolitic, IN, USA

problem #113

Oct 052018


  • 144,250 miles
My vehicle experiences an ┐engine power is reduced┐ message in addition to losing capability of driving faster than 40 mph likely as a result of a common fault by the manufacturer.

- Kalamazoo, MI, USA

problem #112

May 192018


  • 59,502 miles
The contact owns a 2008 Chevrolet Impala. While driving 60 mph, the reduced engine power and the service stability control indicators illuminated as the vehicle decelerated. Staten island Buick GMC (1855 hylan blvd, staten island, NY 10305) diagnosed that sensors T2135: (throttle body) and P2138: (accelerator pedal actuator) failed and needed replacement. The vehicle was repaired. The manufacturer offered to assist with the replacement of the throttle body, but not the accelerator pedal. The failure mileage was 59,502.

- Staen Island, NY, USA

problem #111

Aug 022017


  • 100,000 miles
When my Impala is in motion within the minutes it states engine power reduced and it slows down the car. If I drive 60 mph or more when engine power is reduced then it says service shuttling down and the car will completely shut down it's a big safety hazard especially when I┐M on the freeway.

- Chaparral, NM, USA

problem #110

Dec 282017


  • 57,000 miles
Leaking and can't identify if front engine cover oil is leaking, or engine oil filter adapter gasket, or head gasket oil leak. Help! I was having my oil changed.

- Wichita, KS, USA

problem #109

Jul 192017


  • miles
First, the key will not come out of the ignition without pressing the release key switch located under the steering wheel. Then the car won't accelerate over 20 mph in D while driving anywhere, it won't go over 40 in D3. Not sure why but this is what is happening with the Impala.

- Hewitt, TX, USA

problem #108

Aug 202017


  • 160,000 miles
Engime power reduced seevice tractuon control. While driving power is cut to near nothing. About 20 mph. After shutting the car off and starting a few hours later it's fine. A couple days later it happens again. Faulty equipment from GM.

- Sioux Falls, SD, USA

problem #107

May 032017


  • 34,000 miles
The contact owns a 2008 Chevrolet Impala. While driving 40 mph, the engine reduced power indicator illuminated and the vehicle began to reduce in speed. The vehicle was taken to an independent mechanic who diagnosed that the throttle positioning sensor failed and needed to be replaced. The vehicle was not repaired. The manufacturer was called and informed the contact that if a diagnostic fee was paid, the vehicle could be covered under a technical service bulletin. The contact stated that he did not have money for a diagnostic fee. The failure mileage was approximately 34,000.

- Daytona Beach, FL, USA

problem #106

Nov 152016


  • 161,000 miles
I was driving in traffic around 5:30pm cst on us 59 N and rankin rd Tuesday 11/15/16 when my vehicle lost engine power. I was unable to accelerate or steer and the only light that came on in the car was the service tire monitor system. I managed, somehow, to steer the vehicle to the left shoulder of the freeway and put it in park. I turned off the vehicle and when I went start it again, after releasing the key, it made a stuttering to start sound over and over again even though I was no longer touching the key. When I tried to start it again it turn on and then back off and continued to do this at least 3 more times. I eventually had it towed to my home and after reading online today at forums.edmonds.com many people have been having this issue with Impala's and Suburban's from GM for at least 4 years now, first post is back in 2012. GM needs to put a recall on these vehicles and fix the issue before it more fatalities, as proven in their earlier 2014-2015 recall. They just did a recall about a year ago for Impala's having an issue where the ignition switch would then switch into the off position while driving if you hit a bump too hard and had too much weight on your keys. I got my vehicle serviced for that recall issue but it seems like their fix for that was incorrect and not the issue seeing as my vehicle, and several others, still shuts down while driving and the ignition is still in the on (not off) position, you lose acceleration and steering. This is extremely dangerous and will cause more deaths, injuries, and accidents. Please get this to GM and have them correct this issue in all their models with sensor throttle body's instead of wired ones. They also need to fix the issue of door and A/C accuators in their models, as its been described to me as a common issue in GM models. This is a very unsafe issue for all drivers GM or not. More accidents will follow.

- New Caney, TX, USA

problem #105

Jul 012016


  • 105,000 miles
Two different outcomes but stem from the same issue. While trying to start my vehicle I get a click and care won't start at all. Sometimes after several tries it does fire up. Also when it does start it will sometimes stall. Most recently while traveling didn't the interstate it stalled going 75mph leaving me to coast and disrupt 4 lanes of traffic.

- Staten Island, NY, USA

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