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if you unplug the o2 sensor the computer will act like the o2 sensor is still there and if the problem is the o2 sensor the truck will run better. i did this while trying to figure out what is wrong with mine.
Tried this yesterday and the wife said it didn`t miss at all this AM. I`ll give it another day to be sure. It appears to be the one on the exaust pipe. Thanks to all for the help so far.