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Chevy Impala "REDUCED ENGINE POWER" message



  • gmcustsvcsarahgmcustsvcsarah Posts: 1,964
    Good morning p100,
    I realize that overall you are not satisfied with your Impala, and I'm sorry for that! If we can document your concerns with your vehicle, or look into anything, please don't hesitate to get in touch by emailing [email protected]
    All the best,
    GM Customer Service
  • jrwls05jrwls05 Posts: 1
    Yesterday while driving i got the "Service Traction Control" and "Reduced Engine Power" warnings. I can't believe how many people out there have the same issues with the newer Impalas! This is very frustrating! They should be looking into a recall! :sick:
  • amp_huskyamp_husky Posts: 1
    I starting getting the "Reduced Engine Power" and "Service Traction Control" on May 19th. I have an appointment with the dealing in the morning. I also have an Extended Warranty. I just purchased the car in Aug of 2011. It's a 2008 Impala.

    I want to see what they say about it being covered on the warranty.
  • chevytchevyt Posts: 1
    what was the problem and how much to fix
  • ryusherryusher Posts: 1
    Well believe it or not, my g/f's 2008 Impala with 83,300 miles, has had the Reduced Engine Power problem for at least a month now. I put off servicing it because I ASSUMED, that being a PIECE OF THE ENGINE, it was covered under the Powertrain Warranty. I understand belts, alternators, and other regular maintenance parts are not covered under the warranty, and that's completely understandable. But the THROTTLE BODY....are you serious? So my horror story is driving down the highway at 40 mph and the car just completely shut off and said "Starting Disabled, Service Throttle". So I am going to replace the part myself, because apparently GM will not back up their own manufacturing of a vehicle. I will NEVER purchase a GM car, and this only affirms that I will only buy from the only American Manufacturer that didn't need Bail-Out Money. Apparently it went to good use too, since they won't pay to fix and obviously defective part on a vehicle that is a safety hazard. I cannot wait to get into an accident with my children in the car on the highway and sue the [non-permissible content removed] out of GM for knowing this was a problem and refusing to fix it.

    To GM Rep Sarah,

    Yes I already had this vehicle looked at by the dealer and I am disgusted that it is not covered under the PowerTrain warranty, and I refuse to let them put in the same defective part that is already in the vehicle. And if they are replacing them with a different part, than maybe that's a sign they should recall them ALL! So again, I cannot wait to sue GM after this obviously prevalent problem causes me or my children harm, and then I will use the money to buy a Ford.

    I am buying a remanufactured Throttle Body, and replacing it myself. I will let you all know how it goes.
  • I haven't got it fixed yet. The car will run fine for several days and then I get the problem happening, then clears up, then it starts again and so on. :(
  • jaidablujaidablu Posts: 3
    I am having the same problems with my 2009 Impala. I received the "Service Traction Control" and "Reduced Engine Power" messages while driving on the interstate. I was lucky enough to be close to an exit at the time and exited, but before I could find a safe place to pull over, I got the powering down message. (Can't remember exactly how that read) So here I am driving in a 55mph area still and I cannot even accelerate. I pulled over to the shoulder of the road and had to call a tow truck. This morning my mechanic ran the can everywhere and could not find any issue with it whatsoever. I now have it back with me and that is how I ended up in this forum. I am so frustrated that this is an issue that is just going to come back and bite me whenever. I just bought this car in October 2011. Seven months into it, and now this????? My mechanic said he was afraid that I would have to take it to the dealer, but it sounds like the dealers aren't helping out at all. Any information would be extremely helpful!
  • It was my throttle body or throttle pedal. I also bought my car in October of 2011, however my car is a 2010. I would take it to a dealer to have it fixed that it is what I did. It is a scary situation and I can not believe GM is doing nothing about this problem
  • jaidablujaidablu Posts: 3
    Thanks for the info. Just curious... how much did it cost to have the dealer fix it? Have you had any issues since???
  • jaidablujaidablu Posts: 3
    I am hoping that someone here can help me. I bought my car last fall from a dealer and have since moved to another state so I cannot take it back to that dealer. I tried calling dealers to see if they would know what the problem was. All I have gotten is a lot of "it could be this or that" kind of thing. I understand needing to see the car but they seem to have never heard of this problem before. I told one person about this forum and he said, "Oh, well then, it probably is the throttle body." It just doesn't give me too much confidence in this whole thing. I have read posts where people have taken it to dealers and the problem does not get fixed. I am trying to avoid that, but at the same time get my car fixed. Is there any information anyone can give me as to what I should be telling the dealer?? I am past the point of frustration on this. I am paying on a vehicle I can't even use unless I plan on parking it on the side of the road somewhere...if I am lucky. I owned an Isuzu for nine years and the only time it left me stranded was when it died and I had to finally get a new (for me) car. So I bought a Chevy....should have stayed with foreign.
  • I would try a different dealer in your area. If your area only has one try one near by. The dealer I went too knew exactly what I was talking about.
    I understand your frustration. I am thinking of trading and eating about 2,000.00 to do so. I will by a Ford next time. My contour I just got rid of had over 175K+ miles on it and the transmission quit, only in the shop 3 times in its life!

    My problem was my traction control and stabliight control came on and told me to service it. Then as soon as that came on my reducing engine power came on and my car lost all power. Thank goodness I was not going fast. I was to the throttle body. My part listed on my invoice is J5584 Accelerator Peddle Position Sensor. It found DX code P2138, followed DOC ID 2614036, Replaced Throttle Body Pedal Assambly. this was on 02/28/2012 and so far so go since the replacement.

    I hope this helps you.
  • gmcustsvcsarahgmcustsvcsarah Posts: 1,964

    I hope that your recent move went smoothly and that you're able to settle into your new home okay. I see that you're not feeling confident with your dealership options at the moment; if you would like for us to work with you on this repair, please contact us at [email protected] (in order for us to update our database, we ask that you please include your name/Edmunds username, phone and address, the last 8 of your VIN and current mileage, and your preferred dealership).

    All the best,
    GM Customer Service
  • sew4207sew4207 Posts: 1
    I am also experiencing the "Reduced Engine Power" problem. After work today, I tried to start my 2008 Impala, but I kept getting the "Reduced Engine Power" message. The car starts, but shuts off immediately. I tried repeatedly to get the car to start and stay on, but had no luck. GM Roadside Assistance towed my vehicle to the nearest dealership, Tropical Chevrolet, but the service department was already closed. I had to ride on public transportation for an hour and a half to get home tonight--I was not happy about this.

    Thank GOD this happened in the work parking lot instead of the 6 lanes of bumper-to-bumper traffic I drive through every day to get to/from work. I am very concerned that I could have been hurt while driving my car. I don't understand why this hasn't been addressed by GM given the number of people experiencing this dangerous problem.

    My car only has about 42,000 miles and the bumper-to-bumper warranty expired only 5 1/2 months ago. We're still making payments on the car! My wife and I own two Impalas (She has a 2007) that we bought brand new. I like GM vehicles and was planning to replace our cars in the near future, but I swear I will never buy a GM vehicle again if GM will not take care of this problem.
  • My 2008 Impala is also reading "Service Throttle. Reduce Engine Power" and then proceeds to shut down. Without exaggeration, this has happened at least 25 times since the Memorial Day weekend. The vehicle (and I now use that term loosely) has been in the shop 3 times because of this. Work that has been done to no avail: Fixed leaking harmonic valve. Cleaned throttle body. Replaced throttle body.

    My mechanic has reduced it down to a computer issue. I can only hope this will be the solution and not take any more money out of my pocket. This is such a shame.

    Some notes: Definitely happens more on hot days. Happens at high speed and at idle. Seems like moderate speeds without stopping are the safest speeds without getting the error (25-50mph)
  • boarhoundboarhound Posts: 1
    My husband's 2009 Impala is experiencing the exact same problem: reduced engine power, traction light on, etc. While on his way to work, car lost ALL power on the 401 highway. He was able to get the car over onto the shoulder and call for a tow.

    Took it to his mechanic, couldn't pinpoint the problem, but cleaned a couple of things and was running fine.

    Today the lights came back on, so he managed to get it to a dealer - $350 later, they fixed the following: 122483 defective app sensor, scan test, check code P2138. Check terminal pin grip at x111 connector and at gas pedal connector, ok. Add grease to terminals. Replace accelerator pedal unit. Clear code and recheck, ok at this time.

    I guess time will tell if this is the right fix. I really hope so, as I would hate for anything to happen to him or I while driving that car.

    Can anyone here please confirm if this was the right fix for this problem? :confuse:

    Thanks in advance!
  • dphearddpheard Posts: 1
    The problem is that they charge you $99 just to run any diagnostic.
  • daisey2daisey2 Posts: 1
    I have a 2008 chev impala...nothing but problems since I bought it...first ignition problems,key stuck in ignition..multiple trips to dealer to have that this code...service traction control and reduced power....dealership is fixing it today....$500 later...says it is an air check valve...really? This better be the problem and I hope it gets fixed. I am going to find out if there is any way to get this looked at by consumer group or local news....GM should be fixing this problem before it causes an accident. Contacted customer service and they just said no recall..thanks a lot
    I have only 44000 miles on this car...never buy chev again...
  • beamerballbeamerball Posts: 1
    edited June 2012
    I just recently had a 4 wheel alignment at my local chevy dealer at no charge due to some previous work. Now the car sounds like something is loose in the trunk and makes a rattling noise when I go over small bumps or rough pavement. I've checked the spare tire, jack and other accessories and nothing is loose. The noise wasn't there prior to the dealership doing the alignment. What could be the problem? I've also been told a baffle could be loose in the Fuel Tank. Has 96,000 miles. Help...
  • conniew1conniew1 Posts: 1
    I have been having the same issues... service stabilitrak and engine power reduced.. and having to listen the bing bing bing for 30 miles or more before it shuts up. Talked to dealer when this first happened, was told sensor would reset self and not to worry. Issue continued, and finally dealer replaced the YAW sensor today - no covered by any warranty so cost me $360 - as he told me if I did not replace the sensor the car could just quit running at any time I was driving. Ok.. sounds like a KNOWN issue to me, especially after reading all these posts. WHY is GM not recalling these cars and fixing this KNOWN issue??? Are they waiting for a car to stall and someone to get seriously injured or killed??? This is the first chevy I have owned for the last 25 years, and as soon as I can afford it, this chevy will be replaced with a FORD. Last 3 lasted me for over 150,000 miles with no major problems, and when I had a sensor issue, FORD fixed it for me for FREE... and it was not covered by their warranty!
  • deputy_dawgdeputy_dawg Posts: 4
    edited July 2012
    It has been a couple of months since I started getting the "Reduced Engine Power" messages and then I got a "Service Throttle" and "Starting Disabled" message and when that happend the car just quit.

    So I took it the dealer and got it fixed. The codes were P2122 and P2138, they replaced the APP (Accelerator Pedal Position) sensor. So $461.
  • I had the same repair done at my dealer but it cost me more..$461
  • jtaftjtaft Posts: 1
    I had the same issue in my 2009 was a loose rear sway bar link...just replace the link, cheap fix...
  • roberta13roberta13 Posts: 1
    Wow...should I just write ditto!
    2009 Impala, I got the traction control~reduced engine power~service throttle starting disabled, yesterday.
    If I had gone one more mile without the car stalling, I would not have had cellular service. Called AAA and it took them 20 minutes to track down my exact location. I travel a lot of rural areas and would hate for this to happen when I was without phone service.
    If GM doesn't want to issue a recall, maybe Impalas should come with lifetime Onstar service!
    I previously had a 2004 Hyundai Sonota with 175,000 miles. Never once did I have an issue with that car. I wish I had kept it.
  • I just bought a 2009 Impala with 91,000 miles on it for $5500. The catch is it was in a wreck and repaired. The CARFAX did say there was a wreck in Oct of 2011 when it hit a guard rail due to mechanical failure. I would assume those things were fixed as well but I guess I'll find out. At least I know what's comin! :(
  • I am having the same issues. brought a new battery friday and it started. on sat my husband drove it to work and went to the store and thee car wouldn't start. Got a jump and once we got home we were back at square one. Triple A came out and gave us a boost said that something was killimg the battery. took the car to O'rielly's and they said it was the alternator and the computer system. i will be taking the car to the dealership and explain to them whats going on, but i will make sure I inform them of the proir complaints about these cars. I small children that i transport everyday and i refuse to put there lives in jeopardy while they sit back and ignore the severity of the electrical that they should be fixing. They should do a recall on to many pople are hving the same issues. :mad:
  • mrasco1mrasco1 Posts: 1
    edited August 2012
    I am having the same exact issue!! Lights appeared this morning "service stabilitrak and engine power reduced" and it's making a ticking noise thats coming from my glovebox!! my car is a 2010 also!! im so aggravated, i am a single mom of 3 and can't afford to have a car that is a lemon ESPECIALLY when there is a known issue!!! Flooding GM and/or getting the media involved might not be such a bad idea especially after seeing there are so many. this is BS, and it's obvious nothing is being done about it. :cry: :mad:
  • file a complaint with
  • unfourtunately i have a 07 impala
  • I called you but a woman answered the phone and when i asked for you she asked who i was, i responded but she hung up on me. so if you know of the problem plz email it back to me. thank you.
  • Kirstie_HKirstie_H Posts: 11,077
    The post was removed - we don't permit phone numbers to be posted here.

    Additionally, it would be of WAY more value if the solution were just posted here, where everyone could see it without having to take the additional step of emailing or calling. If someone's got a solution, post it here! That's why we host the forums in the first place - to provide a venue for people to get help, right here.


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