I bought a used 2012 that came with an acropovic exhaust, k&n air filter and PCV. I am having the o2 optimizer issue. The pcv manual says that the green LED light on the o2 optimizer will blink while the o2 sensor is warming up and then turn to a solid green when the o2 optimizer is "working". Mine blinks indefinitely and always trips the FI code c44- heated o2 sensor. It is the only issue I have with my bike and it is annoying as hell. When the FI light is on, it locks out the dashboard menus so you can't cycle through trip meters, clock MPG etc. I am so sick of looking at that red FI light.If you have money to burn and like tinkering with it, I say go for it. There is issues with the O2 optimizer I hear. Trips FI codes..
Do you mean unplug the o2 optimizer and plug the o2 sensor back into its original connector?I'd try unplugging the O2 optimizer and see if the FI code goes away. If not I'd say you have a bad O2 sensor. Heater could be open or shorted or just a bad O2 sensor.