Hi! I have a 1987 accord lxi I've virtuaaly rebuilt. I replaced the oxygen sensor, but after 5 minutes, the light still comes on the dash. I tried disconnecting battery and waiting about half a minute, but it comes back on after 5 minutes of driving. I went to a dealer and they said they'd reset it for $90 plus tax. Is there any other way to reset this? Any and all responses will be greatly appreciated. Thanks.