DTC P0222: Throttle Position Sensor No. 2 Circuit - Low Input: Notes
WARNING: This page is about a different car, the 2003 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
All wires in harness between throttle body 6-pin harness connector and PCM 27-pin harness connector, change color at 16-pin in-line harness connector "X-09".