That's okay. I'm just brainstorming. Try clearing the codes and see what reappears.

The problem may indeed be a bad engine wiring harness or bad throttle body wiring. You wouldn't be wasting money by replacing both. I replaced them in my car without waiting for problems to occur. The throttle body wiring and engine wiring harness looked everything like the pictures posted on this site. Replacement of the trottle body wiring was a no-cost DIY, once I got the wires.