I'm recently getting cylinder 1 and 3 misfires as well as a cam position A bank 1 code. Everything was working fine a few days ago. I recently did an oil change and used Mobil 1 synthetic and a K&N oil filter. Any chance that is causing my problem or somehow damaged my cam? I've got an appointment to take it to Subaru next week but if I could fix it before that I'd love to. I checked the avcs solenoids and they seem to be working fine. I haven't checked the timing belt or cam pulleys yet. Any suggestions?