just picked up my new sti saturday from chicago when got back into detroit area, the cruise control light started blinking, the check engine light came on and i lost my cruise control. Also i have like 0 power after 3500 rpm. You can hear the turbo going crazy but the car doesnt go. The dealership says i have a bad o2 sensor. Is there only one? or more?? sounds like bs to me. Anybody know anything about this or had a similar problem???