Got code 0131, so I replace front O2 sensor, disconnected the battery to reset the computer, and the light came back on. Had it checked and same code, reset the computer again, this time with the code reader and the light came on again. Some people have been telling me to drive from 50-100 miles and it will go off. Do I still need to drive it to get the light to go off even if I reset the computer? I have a 2003 Impreza WRX.