First post here - glad to have the support! My wifes 96 4x4 XLT threw a code P0133 yesterday. I have erased it and am waiting for it to return. If it does, should I attempt to clean deposits from the o2 sensor or should I just replace it? Is the replacement just an unplug and plug the new sensor in? Where in the engine compartment should I be looking? Thank you in advance!