everything points to a bad O2 sensor (even one of the codes), but i just wanted to post here and see if these could all be caused by something else by chance. i'm going to check the wire connections on the O2 sensor in the morning before replacing it completely. something odd that i've noticed since i got the car in december of 07 is that something is blowing the vacuum line on the fpr off of the intake manifold. i replaced the fpr today just because i had an extra laying around. what would cause that? also, are there two O2 sensors or just the one in front of the catalytic converter?

thanks for all the help. i refer to the FAQ of this board constantly.