This does not concern the crossfire but when we get a bad code reading why do we replace the sensor? Shouldn't we be fixing whatever is causing the sensor to get a bad reading and the sensor is good. I'm asking as most of you know the technical stuff inside and out and it just seems weird to change the sensor. Aren't we using sensors to test the engine? I take my JEEP Liberty to inspection but its says an oxygen sensor is reading poorly is the engine ok and the sensor is bad or is the engine bad and the sensor is telling us the engine is having a problem? Than why replace the sensor? Maybe someone can clear this up. Thanks Ron