I just wanted to thank TrackLizard. After reading your comment about not being charged for replacing the OC sensors covered by warranty, I asked my dealer to check out if our Pathfinder was covered and sure enough it was. The dealer was originally going to charge $400 which I couldn't swallow for replacing an electronic component. It was $200 part/$200 Labor. They called me back to offer me $40 off at which point I asked them to check the warranty. Five minutes later they called back and said our 2002 Pathfinder was covered.
Thanks again