04 GT idle issues

My car has been idling stupid high, somewhere between 1500 and 2000, it will kick up the RPMs between shifts as well. Then the check engine light came on. It threw 2 codes, both related to the TPS. One was low voltage to the sensor the other indicated a bad sensor all together. I replaced the TPS and the problem seemed better for a few days though it idled about 1100, its been about 220 miles since I changed it and its doing the same crap again. Any thoughts?

Nothing has been touched or cleaned or messed with. I didnt reset the code after I changed it. I assumed it would fix the problem and the light would go out when the computer ran its diagnosis at whatever interval it does it.