And then I would get my codes cleared (should clear cel at disconnect of battery) and see how long till the cel popped again.. Mine ran around about 8 months with the cel coming on about every 2 weeks after clearing the code. When the Crank Positioning Sensor went out and was replaced my "02 sensor" induced cel hasn't been back.. pushing 3-4 months now I do believe.. I'm thinking it was the post cat sensors.. left and right bank code showing up