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

 

To put it simply.....

Most tech's have a drawer full of "known good" sensors. It's much easier to switch out a sensor to see if that's the problem than to dig into a very complicated fuel or ignition system. Sensors are typically very easy to get to and switch out for a good one. Most mechanical parts will make some sort of noise, smell, or otherwise give some indication when they are failing. Sensors are just another electrical item...... when they go they just go.

 

If the code is telling you that you have a bad sensor, then the sensor itself is bad. It does not mean anything is wrong with the engine. Sensors are like any other electrical part. They will fail eventually.