Same problem with CEL. Only owned vehicle for 4 mths,has coded for both 02 sensors,cam pos. sensor,finally,emissions too high,replaced cat w/direct fit cat.Each time CEL stays off for 4 or 500 miles,just to code something else....car starts,drives perfect,last trip was over 200 miles without missing a beat 60-70 mph.Except the light came on...again.