Last post on Dec 10, 2013 at 4:27 PM
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Chevrolet Impala, Auto Repair, Electrical, Fuel System, Sedan
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#11 of 487 Re: chevy impala "REDUCED ENGINE POWER" message [idahofarmboy]
Jul 29, 2011 (5:10 pm)
I have a 2008 Impala and this has happened twice. I was on the highway and the engine dropped from 60 mph to 20pmh. VERY SCARY!!! I was told the problem was fixed and then it happened again today. Now, I'm told that they do not know why this is happening and they will try something else.
Disconcerting as I drive highways to work --- and it is a huge safety factor.
If anyone learns anything, I would be very interested.
#12 of 487 Re: engine power reduced [gmcustsvc]
Aug 06, 2011 (6:35 am)
I am experiencing the same issue. The reduced power displays on the console, the car slows to a crawl and the Check Engine light comes on. I travel 40+ miles each way to work in Atlanta traffic with speeds around 65-80 (big trucks). I am so frightened that this will occur when I am on my way to work and no time to recover and get off to a safe location. What is happening to these Impalas? I have transmission issue (jerking and sluggish performance); oil leak diagnosed on last oil change and now this. I am on my way to NISSAN today to trade it in as I am so tired of all the issues with this vehicle. I want to buy American, but not much confidence since I bought my Impala. I am surprised there are no recalls with all these issues. What is the threshold for this to happen? Or is it cost prohibitive for them to address it after such GLOWING recovery after the bail out? Chevy (GM) do the right thing please!
#13 of 487 Engine power reduced/Service Traction control
Sep 12, 2011 (6:58 pm)
Not sure if this is related or not but after driving my 2008 Impala (3.5) in the rain for about 5 hours I had two lights come on in addition to the Service Engine Light. The service traction control and then engine power reduced as well. I had the code read and it came up P 2135. If you google the code you will see that GM has issues with a water leak somewhere in the A pillar on the driver's side which allows the water to run down inside the left foot kick and I understand that there is a wire connector inside that takes on water, corrodes and throws the codes. My windshield has been leaking so it is at the dealership today. They have the window removed and are waiting for a encapsulating seal for the window to arrive and then will work on the code issue. There is at least one bulletin for this fix plus a revision for the bulletin so they have had the problem for quite awhile. I have 125,000 K's on a used car so not sure if I will have to pay for the repair or not. Will find out tomorrow.
#15 of 487 CHEVY IMPALA 2008 "ENGINE POWER REDUCED"
Sep 25, 2011 (7:15 pm)
I experienced the EXACT problem today my car just displayed the message and then took me from 50 miles an hour down to 20 mph. Then the car just completely CUT OFF while I was still in drive and I could not even steer the wheel to get off the road. I had my 2 month old son and my 2 year old daughter in the car. There should be something done about this. It's scary and its overall DANGEROUS! It is not a situation that you can control because it is a computer issue. AGAIN...SOMETHING NEEDS TO BE DONE. I was in the middle of the road and it completely shut down that is NOT OKAY!
#16 of 487 Re: Engine power reduced/Service Traction control [bowana]
Sep 25, 2011 (7:32 pm)
Well since my last post the dealer put in a new windshield and found severla issues with the previous install. The car now is quieter on on the highway so all of the sealing was not in place. However, I washed the car and a day later I had the P2138 code come up while on the highway. I incorrectly indicated P2135 in my previous post. The P 2138 is accelerator pdal position sensor plsu it also showed in history the c0242 Traction control code. I had my code reader with me and cleared the code as I was out of town 60 miles and then 3 hours later it happened again. Took back to the dealer and because the service engine light was not on they claimed that they could not read the history code. They did clean connections under the hood and found one to be corroded so I am now 6 days without a code so we will see if they fixed it. There is a service bulletin but because the service engine light was not on when I delivered to the dealer they claim they could not action the bulletin and therefor I paid the $150 for the service.
I will try to report back as to how things go over the next 30 days as I am on the road again this week.
Oct 19, 2011 (7:13 pm)
Car was driving fina all day went to put in gas and then went to start it. Made some noises as if trying to start or knocking and then cut off. It was smoking and had a burnt smell coming from tailpipe. Had it towed home and tryed to start again and now it wont even kick over. Any ideas?????
#18 of 487 "Reduced Engine Power & Engine Light"
Oct 25, 2011 (12:06 pm)
My car is currently at the dealer , where they are reading code coming up with nothing!
Please if anyone know who I can make a formal compliant with at GM this is dangerous and costly going back and forth to the dealer without a resolution.
I just purchased this used 2009 Impala less than a month ago lights came on the next day!
I brought the car back, inform sales and services immediately and everyone is taking their sweet time to correct the problem.... And we wonder why people buy foreign!
#19 of 487 Re: "Reduced Engine Power & Engine Light" [wilant]
Oct 25, 2011 (2:15 pm)
When the service engine light is on the code will be P2138 and because the condition that causes it is intermittent the dealer will not be able to read the code if the light has gone out as was the case with mne last week. However, there is a service bulletin about the problem and if you direct the dealer to have a look at the gas pedal and the sensor that it operates they should be able to determine that the sensor is not "in spec" as they have to run an ohm meter to check it.
The dealer was to install my sensor today but it was damaged in shipping so I have to wait for another one to arrive tomorrow. It will be $180 plus the diagnostic to check it plus install so close to $400 to fix it as I am out of warranty. I have 132,000k on mine so the power train is all I have left.
#20 of 487 Re: "Reduced Engine Power & Engine Light" [bowana]
Oct 26, 2011 (7:27 pm)
Well got the car back today from the dealer. Changed out the gas pedal and sensor (attached) and now I have a new car again. The car responds so much different than before, no hesitation, quicker acceleration and possibly even less rpm's at 100K. Cost was $307 CDN tax paid so not as bad as I figured.
I will still carry my code reader for the next few weeks in case it acts up again but for now I feel that the issue has been resolved and move on. Good luck with your problem but I certainly would start with the gas petal assembly. I did not try to by aftermarket or from a wrecker as I was not sure if the part needed to be calibrated or not. If not, then it should be a simple matter of swapping it out. I was charged 1 hoiur for labor.