After resetting DTCs, it always has Reduced Engine Power, Traction Control Off and Service Traction System on the information center. P1516 (throttle actuator control position) is always there. P0120 (TPS circuit-A output voltage compared to circuit-B) and P0220 (PCM voltage) has reappeared once.

I took the splash shield off, and there does not appear to be any wiring. The large harness at the frame are (1) red and (1) black heavy gauge wires, untouched.