Its on a 2004 Toyota Camry, 2.4L 4 cyl. 120K miles. The check engine light recently came on. After pluggin up the OBD2 scanner it comes back with no codes at all. If I go to do a reset of codes, for the next ignition cycle it will stay off. (Next cycle being, wife can crank it up and run 200 miles light will not come on) But, next time its.