Why same O2 sensor keeps going out

What is your question?

In late October I had to replace my O2 sensor downstream now 5 months later here i am needing to change it again. I used my obd2 scanner the first time & this time & its the same code . What would cause it to go out that fast? 2010 chevy equinox.. I only bring it to the shop at the dealership to have anything done to my car. I dont know what would cause the O2 sensor to go out that fast. Thanks

How long has your 2010 Chevrolet Equinox had this problem?

A month or so