Lexus LS 460 Check Engine Error Reset

The Lexus LS 460 ran out of gas, oops. Got if filled with gas but an error appeared on the driver console to check engine at Lexus maintenance. Called the service department and was told it was an unresolved issue with the car and to reset the error, all that was needed was to unscrew the gas cap, screw it back on, wait 1 hour. Well, did what was told and the error disappeared the next time the car was driven.