That sensor is going to be the passenger side, after the catalitic converter (toward back of truck). I have had to replace that sensor twice. within 60000 miles. Like JMC said, check the wiring and if everything looks ok just replace the sensor. Cost was about $50 at AutoZone. Not sure why mine has gone bad twice but I replace it and after a couple trips around town the check engine light should go out. No big deal.
By the why, how much did you pay for that scanner?
Last edited by Squanto804; 12-06-2001 at 10:06 PM.