I went to the Lexus dealer today and they said that it was eather the wire suppling 12v to the ECM when the car is off or it is the ECM. The apraisal to fix it was around $1300. I took the car home and decided to check if the wire was bad. I ran a wire from the ECM to the battery. I pulled the plug out to find the hot wire, I put it back, hooked up the wire and turned on the car. To my supprise the check engine light was not on. I disconected the wire and turned on the car again and the check engine light was still off. I drove the car and stoped and started the car a few times and the check enging light didn't come back on. I can only think that the plug was loose or makeing pore contact. As an added bonus the dash lights that were out started working again. If the light comes back on I will let you know.