Chevy Impala Reduced Engine Power

HELP! I have an 06 Chevy Impala with a little over 100K miles. Routine maintenance always taken care of. As of the past couple months I have been getting the ENGINE POWER REDUCED message on the dash. Power is kicked back, and speed is reduced as well. I have already taken the advice of the other posts and replaced the throttle body first...did well for a while, and then error popped back up. Yesterday I replaced the accelerator position sensor while we had warmer weather...ran fine last night, only to give me the message AGAIN this morning when it began to get colder outside. I am out of ideas. Anybody have any isight?
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Hi - I'm not sure anyone has found a one-size-fits-all solution for this problem, but you might read through our Chevy Impala Reduced Engine Power discussion to get ideas.
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I have this problem with the stabilitrak/traction control on a 2011 Impala with 46,000 miles. I thought it was due to living in Minnesota with the cold weather, road salt and grime, etc. but I have found other people from all over the country with the same problem. It happens not only to the Impala, either. I've seen the same from the Malibu, Traverse, and Yukon. Mine is going to the dealer for service next week. I reported this issue to GM and they opened a report. They look at issues on a case by case basis. The service tech at the dealer said they see a lot of this problem but it can be caused by different things. I also reported it to SaferCar.gov. Anyone experiencing this should file a report with SaferCar.gov. They take action when they notice a trend.
I also notice that this problem often needs to be repaired multiple times. Has anyone had this problem fixed so it was totally fixed? I've seen the problem diagnosed as the throttle body, sensors, and hub. Very disappointed in Chevy...I've owned new Chevys since 1995 and think I'm going to switch to Toyota.
Hello Everyone,
I'm sorry to hear that you are experiencing problems with your vehicles. Please let us know if you would like for us to take a further look into you concerns. We can be reached via email at socialmedia@gm.com if our assistance is needed. Please include your full contact information, VIN, current mileage, and preferred dealership in the email. Thank you.
Kristen A.
GM Customer Care
I wanted to know if anyone thinks that all of these reduced power errors are all related to the ignition recall?? Even though the recall for the ignition switch is not in my car model (2011 Traverse), I would like to know if related. I have also had multiple repairs done for this issue. My car has had the reduced power happen at least 8 times if not more. I have had my throttle body replaced, sensors, etc. Basically everything they said would fix this has not!!! Any thoughts would be appreciated. I agree with the above comments. I have risked my family's lives by driving this car!!!!!!GM even gave me an extension of my warrenty to 100,000 miles but only after I called the corporate offices because of this issue of the Reduced Power without warning!
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Unplug red cable from your battery and leavr it off for approximately 5 minutes. Replace it and your car should start!!!!!! Hopefully this helps. Have a great one!
I have a 2015 Impala with only 45,000 miles on it and I'm having the same exact issues. My mechanic is stumped.
How far (long) do you have to drive it to get it to happen?
Does the weather conditions appear to play a role in it occurring?
What codes are setting in which modules?
When it acts up does turning the car off and back on restore operation or does it need to sit for a period of time?
I found videos on YouTube that people has been fining the rear manifold loose, I was having some of the same problems too and I went to check the manifold on my 2015 impala LS 2.5L it was loose and tighten up all the bolts, the problem went away so check your rear manifold it takes a size 10 socket you need the long extension
Check you rear manifold i found mine loose and had to tighten the bolts, its a 10mm socket and check your ground wires, the one to the starter especially that may solve your stablitrack problem, there is also a charge sensor that is around your battery ground wire.