Hi all, new here and fairly new to the Subaru scene. I just bought a 1997 Subaru Legacy Outback with 86K miles over the weekend. I was looking it over last night and found a connector unhooked under the dash, right under the steering wheel. I hooked it up to see what it would do, and when I started the car the Check Engine light started flashing. I unhooked it, because the light would drive me crazy. I don't know if the previous owner unhooked the light, or the dealership. Anyway, the car runs fine, no hesitations, great acceleration, no strange noises. Should I be concerned about this, or is it just a bad reading from an O2 sensor or somthing causing it to flash? Any input would be appreciated.