One problem related to check engine light on has been reported for the 1999 Lexus ES300. The most recently reported issues are listed below.
While driving at any speed engine check light came on and stayed on. Consumer could take the battery out and replace it, and the light would stay on for several weeks. Engine check light came on more than eight times in the last eight months. Dealer examined the vehicle twice, but could not find the cause of the problem.