I have a 92 Accord Automatic, 189,000 miles.The other day the check engine light came on. It has a Error 43 code. The car is running good. Seems like the Gas milage has Dropped. Its using more gas. I know this is a Fuel System error. The light comes on after about 7-10 miles of driving. Im thinking maybe its the 02 sensor. Any suggestions?? Thanks..