Unplug the purple and white wire that connects to the scan tool connector. That being plugged in made my bank 1 sensor go all bonkers for the live data.
I am also assuming you have done your spark plugs, wires, and ignition coil. If you are cool with the dudes at your local autozone, you could buy a ICM, pop it in, see if it changes anything, then return it if it doesn't. They actually had one in stock at the store by my house, so It was no trouble grabbing one and returning it.