2003 Jeep Grand Cherokee P1756 Code: Governor Sensor or Control System Diagnosis

I have a 2003 Jeep Grand Cherokee with a 4.0L engine and recently received fault code P1756. I understand this code is related to the transmission governor sensor or control system. Can anyone provide guidance on where to look—specifically sensors, pressure switches, or other components? I'm not very experienced with transmissions, so any detailed troubleshooting steps would be greatly appreciated. Thanks in advance for your help.