O2 Sensor...
 

What are the signs of a failing oxygen sensor, and should I be concerned about them at 122k miles? :confused: ( I love my car)

If there really bad the check engine lite will come on and give you a code for it, but they can also just be slow and give you a poor run or bad gas milege. Some people are just crazy and replace them at 100k just to be safe. If you think your having a problem you can have them checked by a shop with an o2 tester.

Mine has been doing the same thing... I just ordered new o2 sensors. I'll let yinz know how it goes. :)

Mikey