I have a 02 Intrepid SXT and I changed my oxygen sensors and now my car is stalling ? My oil was very low to.?

Why is this happening? Is the problem my oil needing to be changed because I am over the 3000 mile mark times 2 and now my car is starting to sputter and stall. Anything special I need to do and does this have anything to do with my oxygen sensors ?|||Oil doesn%26#039;t have anything to do with it. The 02 sensors normally won%26#039;t cause this. Did anything get disconnected while changing the sensors?