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Chevrolet Impala, Auto Repair, Electrical, Fuel System, Sedan
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#87 of 485 reduced engine power
Mar 27, 2012 (5:02 pm)
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.
#88 of 485 2009 chevy impla
Mar 29, 2012 (5:27 pm)
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.
#89 of 485 Engine Power Reduced/service traction control
Apr 01, 2012 (10:56 am)
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?
#90 of 485 Traction Control Malfunction/Reduced Engine Power/Check Engine Light On
Apr 07, 2012 (11:50 am)
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?
#91 of 485 Re: Traction Control Malfunction/Reduced Engine Power/Check Engine Light On [heather85]
Apr 07, 2012 (1:32 pm)
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!
#92 of 485 Re: 2009 chevy impla [debo6]
Apr 11, 2012 (7:55 pm)
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.
#93 of 485 Reduced Engine Power came up again.
Apr 11, 2012 (8:09 pm)
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.
#94 of 485 Re: 2009 chevy impla [jerseygmdriver]
Apr 12, 2012 (7:11 am)
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 socialmediagm.com (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
#95 of 485 Re: reduced engine power,service stabilitrac,service traction control [termeer]
Apr 13, 2012 (8:04 am)
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.