Accelerator Pedal Sensor problems of the 2008 Chevrolet Impala

Started the car and immediately upon pulling out of parking lot the service traction control error message and reduced engine power messages appeared. This is the 3rd time this has happened on this car. Have entered problem reports for the 1st 2 occurrences on this site. Replaced accelerator pedal position pedal sensor. None of these 3 occurrences were covered under warranty. It was 14 months since the last occurrence and warranty was for 12 months.

While driving any speed, "reduced engine power" light comes on. Happened 3 times and then I received a letter from gm took to dealership for repair. They repaired throttle body. Car still acted the same after I got it. Due to snow storm I didn't drive it a few days. Two weeks later, engine power reduced starts again on the highway going 70mph (this has happened 6 times altogether) now gm advised me to go back to dealership for diagnostic test. They claim it's the gas pedal sensor ans not covered. Replacing the throttle body did not ing to fix the issue and many others have has this same issue. Now gm refuses to make it right and I'm stuck without a vehicle because I can't afford repairs and the car is way too dangerous to drive.

Service traction control/engine power reduced lights came on dash. Car lost all power and when stomping the gas pedal speed would resume, very hesitant from a dead stop. Car was jerking, shut off traction control and car jerked then too. Gm needs to fix this before there are deaths. Also I have no unlocking doors. They have to all be manually unlocked. Battery was replaced in car and on key fab. Gas pedal sensor and throttle body sensor are the triggered codes, gm needs to find the real solution as these don't seem to fix problem.

Our 2008 Impala LS, with 100,000 miles, is having the same problem I am seeing at this web site and all across the internet. Last month, may, 2014, and this month, June, 2014, there was a sudden reduced power alert on the dashboard and the check engine light came on. The speed immediately dropped to no more than 35 mph. Before I could get it to advance to have them check to see if any codes had been dropped by the computer, the check engine light went off. There was no reduced power message either, and the speed returned to normal. I was told to try fuel injector cleaner, which I did. All went well for almost a month, when the same thing happened again this month. This time I was able to get it to advance with the check engine light still on. The computer had dropped 2 codes, both related to the accelerator pedal position sensor. Advance did not have the part, nor did autozone. Fortunately, napa did, for $90, including tax. Our local chevy dealership wanted $50 more. Since it is a very easy part to replace even for an amateur like me, I replaced it. There are only 2 10 mm bolts to remove and an electrical connection to unplug. So it was pretty simple, and so far, this has done the trick, but it's only been 24 hours. This apparently is a job that the dealerships want to charge $300 to $400 to do. As I said, this is a widespread problem for gm, and they have not and will not, so far, do a recall. They should. I'm only out $90 so far, but other people are out much more. If I have the dreaded, follow-up problem with the the throttle body, I will be out a whole lot more. I sent an e-mail to Chevrolet after the first instance, and did get a response back. I told him I didn't want to take any further action unless this happens again. I will be contacting him again now about this latest incident.

Tl-the contact owns a 2008 Chevrolet Impala. The contact stated while driving approximately 75 mph, there was a loss of engine power with an illumination of the warning indicator. The vehicle was coasted to the side of the road where the engine was shut off. Upon restarting, the vehicle resumed without the illumination of the warning indicator. The failure recurred intermittent whenever driving up an incline. The vehicle was taken to an authorized dealer where the accelerator pedal position sensor was replaced. The manufacturer was not notified of the problem. The approximate failure mileage was 40,000. Js.

The contact owns a 2008 Chevrolet Impala. The contact stated that while driving at approximately 50 mph, the engine power reduced warning light illuminated and the vehicle failed to accelerate when the accelerator pedal was depressed. The contact also stated that the vehicle would not accelerate over 30 mph. The vehicle was taken to an independent mechanic, who repaired the throttle pedal sensor and the evaporate system. The remedy failed to repair the failure. The contact mentioned that the throttle pedal sensor was replaced on several occasions but the failure persisted. The manufacturer was notified of the failure. The approximate failure mileage was 50,000.

I was going down the road and out of no where my car says service traction control, followed by service stabilitrak, followed by engine power reduced with a check engine light on. Lost almost all power to the car, could barely turn the wheel and the brakes felt extremely strange. I could only go about 5mph tops down the road. Luckily I was only 2 min from home. Which actually took 6 min because of the reduced engine speed. Right before I pulled in the driveway the motor died. The next day I went out and tried starting it. The remote start wasn't working and my check engine light was still on but it did start up with a turn of the key. I looked up codes and found that it was telling me the accelerator pedal sensor was bad. I have googled this issue and found that it is a very dangerous, common problem with the chevy Impala. Although that is the code it is giving me, other people have had to replace their throttle body to resolve the problem. Gm should recall it before someone gets hurt. I will not be buying another gm vehicle in the future because they are too cheap to fix this common issue which could essentially cost someone their life.

I own a 2008 Chevrolet Impala. Today 11/03/2012 while driving to work the check engine light came on with a message indicating "engine power reduced". I researched the issue and discovered the accelerator pedal sensor is malfunctioning and this causes the message and check engine to appear. This sensor affects the cars drivability and causes limited speed in the vehicle. I looked on google and there are several complaints regarding the same issue. I guess no one has reported it but it seems very common amongst Chevrolet Impala model cars 2006 and up. . Read more...

I currently drive a 2008 chevy Impala, I've only had the car 1 1/2 and not even a year after I purchased it, I start experiencing the (tcs) traction control sensor - which alternatively reduce the speed of the engine; it happens sporadically,. . . I took it to auto zone to have a diagnostic performed on the car, and they reader said it was due to a cylinder 5 misfire. . . . My car is a 6 cylinder, it is dangerous when driving on the highway as when the (tcs) does come on' the reduce engine speed is well under the highway speed limit. Other concerns that arise is that sense this sensor has been own, it' has accumulated other sensors' (abs) (!) and the throttle pedal sensor. I have reached out to the gm to see if there was any recall on this, and was advise that nothing has been done. I think this is a huge danger, as this is a commonly used car in the u. S & if there has been several complaints thus far over the same issue, why hasn't anything been done to resolve the issue? what if you've worked hard to drive the vehicle you want;& have to pay out of cost; other than basic maintenance?.

The contact owns a 2008 Chevrolet Impala. The contact stated that while driving at approximately 60 mph, the engine stalled. The check engine and the power reduced warning lights illuminated. The vehicle was restarted and the failure recurred on multiple occasions. The vehicle was taken to the dealer, who diagnosed that the pedal sensor needed to be replaced. The vehicle was repaired. The manufacturer was notified of the failure. The approximate failure mileage was 85,000.