Seems like there is another issue now. The CEL is on, took it down to Auto Zone and got the code P1117, which is Oxygen Sensor Heating. Also got P0160, which is the O2 sensor circuit not active. Lastly I got P0455, which is O2 sensor circuit slow response (Bank 1 sensor 3).
Possible fixes? Is the O2 sensor a common problem because I remember reading about it on the internet somewhere before buying the car.