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Old Sep 7, 2015 | 09:55 AM
  #1  
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Default Traction Control

RE: 2002, automatic, no performance add ons except Magna Flow exhaust. My display is reading "Reduced Engine Power" Service Traction Control. I plugged in OBDII, it's giving me codes for TPS problems and Fuel Pump Pressure problems.
Any help would be greatly appreciated.
Thanks, Bill
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Old Sep 7, 2015 | 10:11 AM
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donald4972
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St. Jude Donor '14-'15
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Originally Posted by wjb50675
RE: 2002, automatic, no performance add ons except Magna Flow exhaust. My display is reading "Reduced Engine Power" Service Traction Control. I plugged in OBDII, it's giving me codes for TPS problems and Fuel Pump Pressure problems.
Any help would be greatly appreciated.
Thanks, Bill
Guys will be able to help you diagnose this. First you must post all the codes you have, here for our experts to see.
First, clear the codes. Then drive your car around. Then; before shutting the car off, pull the codes again and write them all down. Important to do this, before shutting off the engine!

If you need, do a google search, 'how to get DIC codes on C5 Corvette'.

Each code will be followed by an C or a H (current or history). Post this also.

Good luck,
Don

Last edited by donald4972; Sep 7, 2015 at 11:20 AM. Reason: correction
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Old Sep 7, 2015 | 10:56 AM
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From: Columbia SC
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Originally Posted by wjb50675
RE: 2002, automatic, no performance add ons except Magna Flow exhaust. My display is reading "Reduced Engine Power" Service Traction Control. I plugged in OBDII, it's giving me codes for TPS problems and Fuel Pump Pressure problems.
Any help would be greatly appreciated.
Thanks, Bill
Learn to pull the dash DIC codes. That way you can pull all 325 potential codes from ALL the modules and not just the few from the engine and emissions.



Mr. Sam


PS: Codes will be C or H. C is current.

Last edited by dadaroo; Sep 7, 2015 at 10:58 AM.
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Old Sep 7, 2015 | 01:03 PM
  #4  
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wjb50675
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Default Traction Control

Originally Posted by wjb50675
RE: 2002, automatic, no performance add ons except Magna Flow exhaust. My display is reading "Reduced Engine Power" Service Traction Control. I plugged in OBDII, it's giving me codes for TPS problems and Fuel Pump Pressure problems.
Any help would be greatly appreciated.
Thanks, Bill
As suggested I pulled all the codes from the DIC with just the key in the on position and as it was running, they are as follows:
10PCM P1120 H C
P1221 H C
28TCS C1278 H
No other codes were listed.
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Old Sep 8, 2015 | 06:24 AM
  #5  
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The 2 PCM codes are related to the Throttle Position sensor. That is where the problem lies. The TCS code just says TC is inhibited by the PCM and I would not worry about it.

I will post the exact diagnostics on this for you later today. Headed to a client this morning.

Should not be hard to resolve.

Here is a link on it for your reading pleasure. But I want to get you the info for your EXACT year. This guy just had one bad wire at the connector.


Mr. Sam
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Old Sep 9, 2015 | 07:03 AM
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dadaroo
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From: Columbia SC
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Sorry, apparently I did not post the link. Here is the same info for the 2 codes but correct for your year.

https://www.dropbox.com/sh/n1xob90ch...6xWSVJI4a?dl=0

Take a look and let us know if you need anything.


Mr. Sam
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