So I drove home and after a 50 mile drive with no problems I get home and notice my little engine symbol light thing is on and the HOLD light is also flashing. I didnt feel any sluggish felling or pulling or anything out of the norm so I checked the tranny fluid and its about half an inch from the normal range while hot and a light brownish/caramel color almost like lightly used engine oil. The car currently has about 60XXX miles on it and havent had any problems at all except one time I also had the service engine light come on and I took it to get scanned and came up with bad O2 sensor but it went away after that drive to work and hasnt came on since. I recently changed the spark plugs, oil, oil and air filter and that has been about 2XXX miles ago. Any ideas???