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post #3 of (permalink) Old 01-31-2004, 09:45 PM
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Re: After changing exhaust SES light came on??

I'm betting you have a bad o2 sensor or 4. When I pulled my system out to work on the truck, put it back in then I had a bad sensor. I was told that all the banging around I did with the pipes and stuff destroys a coil inside of them... I broke 2 of the 4. SES light came on and I checked it with a snap-on scanner and saw the readings were waaaaaay off on two of them.

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