yeah you want Overdrive on! it cause a change in ratio in the gears and lowers rpm.

Dont worry about the high rpms Its a 4 clyinder and when you 70-85 mph it will be up there. Is the overdrive off?

I forgot to mention that I have noticed a pattern, Every time i go below a half tank of gas the light does come on if I erased the codes before hand.

I have a 2003 vibe with the 1.8L. It is NOT the GT or AWD.Im new and kinda browsed this fourm but i didnt see any one asking this but im sorry if it is a repeat.About a year ago the check engine light came on so I took it to autozone and got the free OBDII check and it came up with 6 codes all about...