Last post on May 14, 2013 at 6:23 AM
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Chevrolet Impala, Auto Repair, Electrical, Fuel System, Sedan
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#137 of 427 Re: chevy impala "REDUCED ENGINE POWER" message [idahofarmboy]
Jun 13, 2012 (8:07 pm)
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.
#138 of 427 Service Throttle Reduce Engine Power 2008 Impala
Jun 14, 2012 (9:26 am)
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)
#139 of 427 Re: Service Throttle Reduce Engine Power 2008 Impala [justgetitfixed]
Jun 14, 2012 (3:16 pm)
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?
Thanks in advance!
#140 of 427 Re: chevy impala "REDUCED ENGINE POWER" message [gmcustsvc]
Jun 18, 2012 (8:46 pm)
The problem is that they charge you $99 just to run any diagnostic.
#141 of 427 Service traction control and reduced engine power
Jun 22, 2012 (9:54 am)
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 fixed...now 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...
#142 of 427 Noise from rear of 2009 Chevy Impala
Jun 23, 2012 (4:18 pm)
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...
#143 of 427 2010 Chevy Impala issues
Jul 12, 2012 (10:46 am)
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!
#144 of 427 Re: Reduced Engine Power [deputy_dawg]
Jul 17, 2012 (4:59 pm)
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.
#145 of 427 Re: Service Throttle Reduce Engine Power 2008 Impala [boarhound]
Jul 17, 2012 (5:02 pm)
I had the same repair done at my dealer but it cost me more..$461
#146 of 427 Re: Noise from rear of 2009 Chevy Impala [beamerball]
Jul 28, 2012 (6:39 am)
I had the same issue in my 2009 Impala...it was a loose rear sway bar link...just replace the link, cheap fix...