02 sensors ?

I no longer recommend people have auto parts stores read their OBD codes. They can pull the codes as well as anybody else, and can tell you the code definition, but that is a long way from knowing what is going on. Most codes that mention an O2 sensor are not caused by a bad sensor but auto parts stores will sell you the sensor anyway.

The best approach is to take it to your mechanic. He will figure out what is going on more quickly (and inexpensively) than random parts guys will and he won't introduce new problems.

What code? The old p0440 ? Sometimes if it's a catalyst below threshold or bank 1 or 2 lean it can many things. A good way to be more accurate is to use a scan tool with live data graph each sensor upstream and downstream this way you know if it's a sensor or a catalytic converter also could be a vacuum leak. Bad o2 sensors will generally give a specific code like bad heating circuit or no response.

Anyone dumb enough to ask questions here and not post the codes shouldn't be playing mechanic!!

First off, a car computer CAN NOT determine that an O2 sensor is bad. It CAN tell that readings are out of the expected range. A bad O2 sensor along with about 10 other things can cause that. Second, an E-VAP code has NOTHING to do with the O2 sensor. Sounds like it would be cheaper to buy a new car than for you to attempt to fix it.

Could always be the connector. For the evap code I would inspect the vacuum hoses around the canister.

The code wasn't for O2 sensors, they were just reporting the problem. You need to find out what the real problem is by revealing the code first. Very confusing question, you got an evap code but you decided to change the O2 sensors? The parts store is going to love you.