480-800-22-75-96-562-985-785....about any number you can think of. O2's at cruise arent very important really. O2's at WOT are a whole different story. Look at CC (Cross Counts) to see how the sensor is functioning. As in, it should cycle from 0-255 while cruising. If it takes a long time for them to change, then the o2 needs replaced.
-Adam