Sooner or later it's going to be the wiring harness. It has the main harness and another called the Battery aka "B" harness, The "B" harness connects to the solenoid on the starter. If you're good at DIY, your can rewire the B Harness. The actuator aka throttle body also has he same wiring problem. Heat destroys the insulation in the harness. Therefore, the more the wiring is disturbed the more likely the insulation will fail and a short will occur.

"Limp Home Mode" is the tell tale sign.