The Modulating Pressure Control Solenoid Valve's purpose is to control the modulating pressure depending on the continuously changing operating conditions, such as load and gear change.
The Modulating Pressure Control Solenoid Valve is always active. The solenoid uses pulse width modulation (PWM) to control the transmissions hydraulic fluid pressure that is determined by the Transmission Control Module
Start by testing all of your fuses since it is possible for this code to set with a blown fuse. If the fuses are ok, then you will need to inspect the wire connector going into the right front corner of the transmission. You will need to look for damaged wires or damaged pins.
If all of that looks ok, then you will most likely need to replace the electro-hydraulic assembly and this is mounted on top of the valve body inside the transmission.