Suparslinc

I had a check engine light, so w/o running the code I replaced the o2 sensor, cause thats what it read before.
Unfortunately, this didn't solve the problem.
The light is back on, and when I step on the gas it goes away.

Is this indicative of a TPS that needs to be calibrated? I just set it this summer using both the test lamp and the ohm procedure. Can it be off so soon?

The car is getting about 15 mpg right now and its got me royally pissed off because I'm trying to sell it.