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Chevy Impala "REDUCED ENGINE POWER" message



  • Mine was covered. They pushed it through but I had around just over 38,000 miles on mine. I also just two weeks prior to the reduced engine power and stabiletrak come on my whole transmission pump went out. So they may have been being nice. I had to get the throttle body in the foot pedal replaced. I am disappointed to and this is our first GM purchase after years of fords too. We had a lemon of a GM in 1998 and we thought we would give it a try again I wish I would have bought the Ford Fusion for the extra 2500.

    Good luck I hope it work out.
  • gmcustsvcsarahgmcustsvcsarah Posts: 1,964

    I see your Impala is a 2009, and may still have bumper to bumper coverage on it; we can check to see what warranties remain on your vehicle if you wanted to email us the last 8 of your VIN to Have you taken any steps to get this addressed since you posted? I apologize for my late response - sometimes the tool we use to find posts doesn't catch everything.

    GM Customer Service
  • gmcustsvcsarahgmcustsvcsarah Posts: 1,964

    When are you planning on going in to the dealer? Please keep us posted on your progress, and if you would like for us to get involved further, please send an email to with more information (include your name/Edmunds username, phone and address, the last 8 digits of your VIN and current mileage, and name of your dealership).

    All the best,
    GM Customer Service
  • chvylvrnotchvylvrnot Posts: 1
    edited March 2012
    i own a 2008 chevy impala lt 3.9 lt flex fuel it barely has 84000 mile on it. The darn thing is really teeing me off ive replaced 4 sets of tires on this heap and hub bearings struts and almost every other suspension part you can name, to no avail. I am so mad i could spit i wish chevy would recall like they did for the police and govt. cars but no joe public is not as important as the govt. so once again we get screwed and big business wins out. :mad: :mad: :mad: :mad:
  • debo6debo6 Posts: 5
    Iam having the same problem with my car. My problems started two months ago. Reduce engine power. 1st problem with this car,I was driving on I45 going to Houston,Texas. Darn car stopped on the highway. Thank God,after I completely turn the motor off,let it sit for 15 min.started the car. completed my trip. Now the car has that message every other day"reduce engine power" I am about to trade this car in for an Altima. Hopeful GM will do a recall before someone is killed.
  • k200385k200385 Posts: 1
    I have had the car for a while now...right at 80000 miles and this light pops on five minutes after I pull off. I do not know much of anything about cars, so I turned right around and came back home. what does this mean?
  • I have a 2008 Chevy Impala LT. I have had this car since October 2011. There was approx. 68,000 miles on it when I got it. Ever since I have had the car the dash has flashed 'Traction Control Malfunction' followed by 'Reduced Engine Power' then the check engine light would come on. I would pull over, turn the car off, and let it sit for at least a minute. When I would turn the car back on it would be back to normal. At first, this would only happen every few weeks when going uphill or right after it would rain so I really didn't think it was a major issue. About a month ago I gave someone a jump and noticed afterwards that my check engine light was on. I took my car to AutoZone and had them read the codes. The codes it was giving were: P0172 running rich bank one, an O2 sensor (that's no big deal and easy to replace), P2138 Throttle Position Sensor, and it said that the Powertrain Control Module indicated a Traction Control Malfunction (which was already known). I reviewed my warranty manual and found that all of these problems should be covered under my powertrain warranty. I took it to the dealership so they could look into it further by running a diagnostics test and hopefully fix the problems free of charge. I got a call back the next day from the service department and was informed that the problem was my GAS PEDAL. I asked about the other codes that I had found and also asked why my check engine light was on and they told me that they really didn't know. Hmmm. I was told that the gas pedal was not covered under the warranty, but really needed to be replaced for safety issues. I declined to let them fix it because the price was a little too steep for me. My questions are: Could a bad gas pedal trick my car into thinking that all of those other things are wrong? Why could the dealership not tell me why my check engine light was on? Shouldn't a bad gas pedal be important enough to list as a recall item? Where do I go from here?
  • Take it to another GM dealer. My throttle bottle sensor was bad, which I believe is in you gas pedal. I am looking at my service ticket right now and it says the accelerator pedal position sensor was replaced. I do think this should be a recall as it seems to be far too common. I was lucky and mine was still under warranty. Although mine is only a 2011 and has had its fair share of issues.

    I hope this helps!
  • I have been having similar problems with my 08 Impala. It felt like it was hesitating, Or slipping, for about a week. Then one morning I pulled out of a parking area and the car just dropped off with no power. and I got a Reduced Engine Power message. When I took it to the dealer. I was told they found a shorted out wire or something. and that was the problem. I also checked my Trans. Fluid on the day I took the car in. It was showing slightly low. But they didn't check any of that. as a matter of fact I had an oil change done the same day and they never topped any of the fluids. But back to the Reduced power, as I said they told me the shorted wire was the problem. Well it has been Two and a half weeks since then and the problem is back. I would like to know what can be done about it? I hope someone from GM sees this and gives me a reply. Thanks.
  • jerseygmdriverjerseygmdriver Posts: 3
    edited April 2012
    I posted this as a reply to another post. But I wanted to have it posted on it's own. Or as it's own message. So I have had the Message reduced engine power come up again after it was supposedly fixed at the dealer. The first time it happened, I had a slight hesitation. And sometimes it felt as though the Transmission was slipping. Then I got the reduced Engine Power message. On the day of my service appt. I checked my trans fluid. it showed slightly low. I told the dealership this but when they checked for what was causing the reduced power message. they said it was a shorted out wire. they supposedly fixed this and told me that was it. Well I have the problem again. I still have warranty on my drive train. I hope what ever is the problem will be covered. Because the wire issue already cost me $200.00 Does anyone know what I can do? As I said in the last message. I hope A GM Rep sees this and gives me a reply.
  • gmcustsvcsarahgmcustsvcsarah Posts: 1,964
    Good morning jerseygmdriver,

    Thanks for posting - I'm sorry that the wire didn't turn out to be the root of the reduced engine situation. If you were planning on continuing to work with your dealership, please send an email to (include your name/Edmunds username, phone and address, last 8 of your VIN and mileage, the name of your dealership and details about any visit(s) there that had to do with the reduced engine power message) and we'd be happy to look into this further with you.

    All the best,
    GM Customer Service
  • Same problem here. I have a 2007 with the 3.5L V6. 66k miles. I did some checking and the solution is a replacement thottle body.

    The throttle plate is driven by a small electric motor, not a cable. The pedal provides input for the motor to open the throttle plate and close the throttle plate. The computer also will open or close the plate for A/C at idle, warm up etc. This is called 'drive by wire'

    The motor has a plastic gear inside that engages a pinion gear on the throttle plate. The plastic gear was worn and it was jumping on the teeth. This is a poor design. I own other GM vehicles with drive by wire and some have over 200k miles. GM may have switched suppliers or a redesign for cost reduction. It's hard to say as that would only be conjecture. The problem seems to be mostly on V6 Engines (3.5, 3.6, 3.9L) made in Ontario. Again this is not fact but an observation. I do believe GM knows about the problem. The fact this doesnt throw a trouble code is disturbing. Let's hope the mistake is not repeated.
  • av2010av2010 Posts: 1
    Apparently my reply to gmcustsvcsarah didn't go through. I stated that my car ('08 Impala ~ 82k miles) had both the Engine power is reduced and Service Traction Control messages pop up in my display today, so I did a Google search to see what could be wrong. I was surprised to see that several others have had this issue.

    My question: 1. Why haven't you stepped up GM to do something about this clearly recurring problem?

    I have had a Chevy since I was 16. I have gone through 3 Cavaliers and bought my Impala a couple years ago. I have always been an advocate for Chevy, but based on this I may have to switch to a Toyota. I need reliability, not American-made. And, although I love to buy American as much as I can, I don't need to be driving my children around in a car that has issues that are clearly known about by the manufacturer, as Edmunds is a place to track comments. Stop turning the other cheek and correct this problem!! :sick:
  • gmcustsvcsarahgmcustsvcsarah Posts: 1,964

    It's odd that your message didn't go through! Had you heard back from Christina at Perhaps resend?
    GM Customer Service
  • Karen_CMKaren_CM Posts: 5,020
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  • I'm one of many who has a problem with my 08 Chevy impala who was on the turnpike today when my car read a message engine power reduced followed by disabling throttle and my car shut off I was almost taken off the highway by a truck or 2 because the car completely shut down as a student I cannot have these kind of problems to worry about and the Chevy dealer in my area told me to cut my car off turn it back on nd try to make it home or get it towed but they probably won't know how to fix it because the error MSG could mean changing the gas pedal or something electrical. If I were dead as a result of such a malfunction what would Chevy do about that ! I want good service and I'm not sure if Chevy can provide me with that # get it together I'm starting a petition for a recall
  • Safety first Chevy recall on sign the petition
  • debo6debo6 Posts: 5
    same thing happen to me this weekend,return trip from Houston,Texas. Car went dead on the freeway with my grandchildren in the back seat. I hope Gm Does not wait until someone loose a life or two,before they do a recall.
  • dixonmrdixonmr Posts: 1
    This is getting absolutely ridiculous. I have a 2007 Chevy Impala and have had the "Check Engine" Light on for about a year now. I brought the vehicle to several Chevy Dealerships in Virginia and New York and have spent thousands of dollars in repairs which were supposed to fix this problem. Last week I had a situation in which I was driving on the highway and the car said "Reduced Engine Power" and shut-off on the middle of the highway. This is extremely dangerous and there should be a recall done immediately before someone gets seriously injured by this. It is obvious this is a huge problem many people with 2007 Chevy Imapala's are having. If GM wants continued support, they better do something about this.
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