Yesterday, a very hot day in Texas my 2002 ES300 would not start. It was not the battery. This morning when I tried to start it, it turned over right away. I drove it around for 20 minutes, came back to the house and turned it off. It would not start again. 30 minutes later it started right up. What could the problem be? Thank you for your input.

Have you been able to solve this problem?