I've had my car for a little less than 2 months now, and everything has been fine. I have a 1997 Prelude and just today the "Maintenance Required" status changed from green to yellow and I have no clue what could be wrong with it. I just got the oil and filter changed 400 miles ago and the only thing I could think of is that the battery may be running low because of my amp and subs, or that the O2 sensor may be off because I live at the beach. Any suggestions or should I just take it to an auto shop and let them look at it? Thanx.