Oh the dreaded VSC Trac and CE lights

My 2004

$229 Toyota SR5 TOYOTA Tundra Interior BURL Wood Dash Trim KIT Set 2007 2008 2009 2010

Toyota SR5 overheated and the check engine light came on with both VSC and stability trac lights. I know the other two always come on with check engine. I have been to two parts stores to get the p codes checked and in both cases they have not been able to get a reading. Both said that there is no power to the connector, and the meter won’t reed. I am wondering if there are any possibilities with a wiring harness that got melted in the over heat. If not, what else may have caused the problem.

I topped off the coolant and drove over 200 freeway miles with no problems or weird sounds or overheating. However since arriving home, the starting is a little weird. I starts fine with a cold start, but doesn’t like a hot engine start.

Is there anything I should check before I reset the check engine light? Is there a fuse that may have blown because of the overheat? If so, where is that fuse likely to be located?
Also, I would really like to find the cause of overheating. It happens on hot days at low speeds like traffic jams.