I would suspect that the connectors to the O2 sensors are contaminated with oil.
You may have to take the sensors connecters off (as well as all that were contaminated) and clean them with electronics cleaner.
If any oil got into the intake, the burning oil could contaminate the O2 sensors.
You may have ruptured a seal, do you have any blue smoke out the exhaust? Either on start up or when running?
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Monday, September 8th, 2008 AT 6:03 AM