When Monitored
WARNING: This page is about a different car, the 2016 Jeep Wrangler and 2015 Jeep Wrangler. However, it is still accessible from the selected car via links, so may be relevant.
Continuously with the ignition on, engine running, the Modulating Pressure Control Solenoid Valve is either off, or active with 25-75% duty cycle, with no Solenoid Supply Voltage DTCs present.