Engine power reduced/ traction control - Chevy Impala Forums

It appears you have not yet registered with our community. To register please click here...

Chevy Impala Forums

Go Back   Chevy Impala Forums > Performance and Technical > Mechanical and Electrical Problems

Mechanical and Electrical Problems Having problems with your Chevy Impala? Discuss it here.

Reply
 
LinkBack Thread Tools Display Modes
Old 04-06-2013, 03:21 PM   #1 (permalink)
Junior Member
 
Drew65's Avatar
 
Join Date: Apr 2013
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
Engine power reduced/ traction control

Hey guys,
It seems this is a common problem.I have a 2007 Impala LT with about 107,000 miles. (All highway driving). Out of no where, while driving, the display says "Engine Power Reduced" and then switches to "Service Traction Control". Then just like everyone has stated, I have limited power, the check engine light comes on and so does the traction control light. I can drive the car to where I am going, but no acceleration. I shut the car off and a few hours later after I start it again, only the check engine light is still on, but no more messages and the car runs fine. About a day or two later when I start the car even the check engine light is off. No problems or messages, car runs fine. About a week of driving goes by and the whole thing happens all over again at some random time, then clears itself again.
Any advice to what the problem/fix would be? Also, if I go to the dealer and the lights are off with no messages, can they diagnose the problem? Is there a memory in the computer for past codes or does it have to be actually happening? Thanks for any help/advice.
I really prefer a big block with no computer and a carburetor!

Drew65 is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 04-06-2013, 10:57 PM   #2 (permalink)
Mr. Handy
 
g25racer's Avatar
 
Join Date: Apr 2012
Location: Michigan
Posts: 4,775
Thanks: 438
Thanked 576 Times in 478 Posts
I am not all that familiar with these cars but, to me it sounds like you have a faulty ABS harness, sensor, or possibly moisture in the abs connection.

Yes the codes are stored and the dealer should be able to view them.

Personally: I would take all the wheels off and inspect the abs harness's to each wheel. Check for binding or cracked wires. Then, remove the connector going to each hub and use compressed air and a small brush to clean the contacts. Then, apply a few dots of dielectric grease (bought at any auto store) to each terminal. This will keep moisture out.

__________________
2001 Impala LS
Spectre Cone Filter
Thunderbolt Spun Cat and o2 emulator
ZZP Alternator Power Cable
Wagner Thermoquiet Pads
KYB Strut Plus (Rr)
L67 Pass Eng Mount
Gloss black trim and flat black rims
VHT and Polished Tail Lights
Led plate, full interior, trunk, and console
Black interior accents (handles and switch panels)
Jbl gto 6.5" and 6x9" with trunk amp bypass

"Apply Dielectric Grease or I kick some arse"
g25racer is online now   Reply With Quote Quick reply to this message
Old 04-08-2013, 11:56 AM   #3 (permalink)
8th Gen Antagonist
 
kingnutin's Avatar
 
Join Date: Mar 2009
Location: Vancouver , WA
Posts: 13,662
Thanks: 516
Thanked 1,191 Times in 787 Posts
Definitely get that code read, if it turns up a p2135 I think it was, you need to replace the throttle body. Of course check the code first though and post it here.

__________________
1978 Caprice Classic Landau
350 2-bolt, stock 4bbl
Stock rebuilt TH350
Edelbrock performer cam + intake
Dual 2 1/2" Flowmaster exhuast (waiting to be installed)
Edelbrock IAS Classic shocks
95 9C1 3.08 posi
4 wheel disc brakes!
16x8 American Racing Baja's with 225/60/16 Pirelli P4's

kingnutin is online now   Reply With Quote Quick reply to this message
Old 04-09-2013, 01:13 AM   #4 (permalink)
Mr. Handy
 
g25racer's Avatar
 
Join Date: Apr 2012
Location: Michigan
Posts: 4,775
Thanks: 438
Thanked 576 Times in 478 Posts
^^ Wow a throttle body issue on these 8th gens will cause the "Service Trac control" to appear? I did not know

__________________
2001 Impala LS
Spectre Cone Filter
Thunderbolt Spun Cat and o2 emulator
ZZP Alternator Power Cable
Wagner Thermoquiet Pads
KYB Strut Plus (Rr)
L67 Pass Eng Mount
Gloss black trim and flat black rims
VHT and Polished Tail Lights
Led plate, full interior, trunk, and console
Black interior accents (handles and switch panels)
Jbl gto 6.5" and 6x9" with trunk amp bypass

"Apply Dielectric Grease or I kick some arse"
g25racer is online now   Reply With Quote Quick reply to this message
Old 04-09-2013, 09:16 AM   #5 (permalink)
8th Gen Antagonist
 
kingnutin's Avatar
 
Join Date: Mar 2009
Location: Vancouver , WA
Posts: 13,662
Thanks: 516
Thanked 1,191 Times in 787 Posts
Thats more secondary to the "reduced engine power" issue, it shuts down everything and goes into fail safe mode. I'm not saying necessarily that is what is going on here, just a possibility.

__________________
1978 Caprice Classic Landau
350 2-bolt, stock 4bbl
Stock rebuilt TH350
Edelbrock performer cam + intake
Dual 2 1/2" Flowmaster exhuast (waiting to be installed)
Edelbrock IAS Classic shocks
95 9C1 3.08 posi
4 wheel disc brakes!
16x8 American Racing Baja's with 225/60/16 Pirelli P4's

kingnutin is online now   Reply With Quote Quick reply to this message
Old 04-09-2013, 09:34 PM   #6 (permalink)
Mr. Handy
 
g25racer's Avatar
 
Join Date: Apr 2012
Location: Michigan
Posts: 4,775
Thanks: 438
Thanked 576 Times in 478 Posts
^^ Gotcha

__________________
2001 Impala LS
Spectre Cone Filter
Thunderbolt Spun Cat and o2 emulator
ZZP Alternator Power Cable
Wagner Thermoquiet Pads
KYB Strut Plus (Rr)
L67 Pass Eng Mount
Gloss black trim and flat black rims
VHT and Polished Tail Lights
Led plate, full interior, trunk, and console
Black interior accents (handles and switch panels)
Jbl gto 6.5" and 6x9" with trunk amp bypass

"Apply Dielectric Grease or I kick some arse"
g25racer is online now   Reply With Quote Quick reply to this message
Old 04-10-2013, 03:11 PM   #7 (permalink)
Junior Member
 
Drew65's Avatar
 
Join Date: Apr 2013
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
Thanks for the advice. I am a little confused though. Why would the message about the "Traction Control" come up if it is related to the throttle body? I may replace the throttle body anyway (most guys here say it's cheap enough and very easy to replace). I would think that ANY problem would trip the "reduce engine power". Like you said, it is the failsafe default for any of the vehicles failures/conflicts. But that would be the secondary step AFTER the computer detects a primary problem. In this case the traction control.
Not sure if that makes any sense but that's the way I would think-- but maybe not the computer on these cars!! Thanks again for your input!!

Drew65 is offline   Reply With Quote Quick reply to this message
Old 04-11-2013, 03:16 PM   #8 (permalink)
8th Gen Antagonist
 
kingnutin's Avatar
 
Join Date: Mar 2009
Location: Vancouver , WA
Posts: 13,662
Thanks: 516
Thanked 1,191 Times in 787 Posts
I'm thinking traction control gets disabled BECAUSE of the reduced engine power/limp mode. You can replace the throttle body if you want, it is extremely easy, but its close to $300, which to me is far from cheap. I would get that code read first.

__________________
1978 Caprice Classic Landau
350 2-bolt, stock 4bbl
Stock rebuilt TH350
Edelbrock performer cam + intake
Dual 2 1/2" Flowmaster exhuast (waiting to be installed)
Edelbrock IAS Classic shocks
95 9C1 3.08 posi
4 wheel disc brakes!
16x8 American Racing Baja's with 225/60/16 Pirelli P4's

kingnutin is online now   Reply With Quote Quick reply to this message
Old 04-17-2013, 07:41 AM   #9 (permalink)
Junior Member
 
Drew65's Avatar
 
Join Date: Apr 2013
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
I just had the car scanned and the display says "Throttle Position Sensor" is the problem. Going to order one and put it in to see if that fixes it.

Drew65 is offline   Reply With Quote Quick reply to this message
Old 04-17-2013, 11:39 AM   #10 (permalink)
8th Gen Antagonist
 
kingnutin's Avatar
 
Join Date: Mar 2009
Location: Vancouver , WA
Posts: 13,662
Thanks: 516
Thanked 1,191 Times in 787 Posts
Throttle body, the TPS is integrated, can't be purchased separately. Fortunately, it doesn't need to be programmed on these cars, it's plug and play.

__________________
1978 Caprice Classic Landau
350 2-bolt, stock 4bbl
Stock rebuilt TH350
Edelbrock performer cam + intake
Dual 2 1/2" Flowmaster exhuast (waiting to be installed)
Edelbrock IAS Classic shocks
95 9C1 3.08 posi
4 wheel disc brakes!
16x8 American Racing Baja's with 225/60/16 Pirelli P4's

kingnutin is online now   Reply With Quote Quick reply to this message
Old 04-28-2013, 10:36 AM   #11 (permalink)
Junior Member
 
Drew65's Avatar
 
Join Date: Apr 2013
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
Well, you can buy the "throttle position sensor" separately. I ordered one online for $60 and installed it in about 15 minutes. It's very easy to do. It mounts on the side of the throttle body with 6 clips. If you do order the entire throttle body (for $135), the throttle position sensor is included. I did the install and everything seemed OK for about two days, then all the warnings and reduced power again!!! So this time I went to another shop, they scanned it and told me '"throttle position sensor" again. BUT, then the guy laughed and said "yeah, we used to call that a gas pedal". Holy cow! Just like on my other car the "fly by wire" gas pedal (sensor) went bad. So I ordered the accelerator pedal assembly on line for $65. Installed that in about 5 minutes (two bolts and plug it in). So far, all is well after a week. Just one last question: The check engine light is still on. Thought it would go off after some good input into the computer while driving. Does it need to be reset? or how long will it take to reset itself? Thanks!
PS While I had the TPS off the throttle body I took a look at the white plastic gear that so many people say goes bad or gets stripped. It looked OK.

Drew65 is offline   Reply With Quote Quick reply to this message
Old 04-29-2013, 12:22 PM   #12 (permalink)
8th Gen Antagonist
 
kingnutin's Avatar
 
Join Date: Mar 2009
Location: Vancouver , WA
Posts: 13,662
Thanks: 516
Thanked 1,191 Times in 787 Posts
My gears looked fine too, but replacing it still fixed it. The code for the pedal should be different than the code for the tps, should say sensor input or something like that. Where did you get the parts? When I purchased only the dealer had anything, and it was only the entire TB you could get.

__________________
1978 Caprice Classic Landau
350 2-bolt, stock 4bbl
Stock rebuilt TH350
Edelbrock performer cam + intake
Dual 2 1/2" Flowmaster exhuast (waiting to be installed)
Edelbrock IAS Classic shocks
95 9C1 3.08 posi
4 wheel disc brakes!
16x8 American Racing Baja's with 225/60/16 Pirelli P4's

kingnutin is online now   Reply With Quote Quick reply to this message
Old 05-12-2013, 09:58 AM   #13 (permalink)
Junior Member
 
Drew65's Avatar
 
Join Date: Apr 2013
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
Been driving awhile to see what would happen... I get my parts from Rock Auto. They always have a good selection and their prices are usually 20% less than the auto stores. They had all the parts sold separately. --- So the "check engine" light is still on, but the car runs fine and no error messages. I went and had it scanned again. Now it says "Canister Vent Valve Solenoid". The code is P0449. I can get that too for about $45. It is an easy access/install part next to the gas tank under the car. I probably will do it. They said it could also be a bad Vapor Canister or Canister Purge Valve. Where are these located??? Thanks!

Drew65 is offline   Reply With Quote Quick reply to this message
Old 05-13-2013, 02:58 PM   #14 (permalink)
8th Gen Antagonist
 
kingnutin's Avatar
 
Join Date: Mar 2009
Location: Vancouver , WA
Posts: 13,662
Thanks: 516
Thanked 1,191 Times in 787 Posts
You should be able to clean and lube the canister vent, that usually gets them working again. The purge valve is located on top of the engine.

__________________
1978 Caprice Classic Landau
350 2-bolt, stock 4bbl
Stock rebuilt TH350
Edelbrock performer cam + intake
Dual 2 1/2" Flowmaster exhuast (waiting to be installed)
Edelbrock IAS Classic shocks
95 9C1 3.08 posi
4 wheel disc brakes!
16x8 American Racing Baja's with 225/60/16 Pirelli P4's

kingnutin is online now   Reply With Quote Quick reply to this message
Old 05-20-2013, 05:01 PM   #15 (permalink)
Junior Member
 
saxmonster's Avatar
 
Join Date: Feb 2013
Location: NJ
Posts: 9
Thanks: 0
Thanked 0 Times in 0 Posts
Hey Guys where do you go to have the codes read? I have a little pocket one that shows no codes on my 03 impala but I am have issues with the traction control coming on when i first pull out of the driveway and now today my dash lit up like a firework show with abs, traction control off and service traction control on the display. Turn car off to do errands and it all went away but now I notice my abs coming on sometimes when i go to stop. That could be a little dangerous if or when i may need to slam on them and it doesn't allow me to brake hard. Does the dealer cost to read codes?

saxmonster is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply


Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Chevy Impala Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
09 Impala engine/traction control light slbrewer Mechanical and Electrical Problems 22 07-02-2014 12:28 PM
Reduced Engine Power and Service Stability Control msg/Throttle Body issue Bminder 8th Gen Engine Performance 25 04-23-2014 08:08 AM
2011 p2138 reduced engine power billcost Mechanical and Electrical Problems 29 04-09-2014 06:31 AM
Engine power has been reduced warning??? waitemike85 Chevy Impala 8th Gen Discussion 4 04-13-2012 09:37 AM
Chevrolet : Impala LS Great on Gas, V6, Power Seats, Traction Control, ABS RSS Bot eBay Cars For Sale: Impala 0 10-29-2010 10:10 AM




Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0 ©2011, Crawlability, Inc.
This site is not affiliated nor endorsed by General Motors Corp. Chevy Impala and related trademarks are the property of General Motors Corp.