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Possible Causes

WARNING: This page is about a different car, the 2017 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes
HYDRAULIC SYSTEM FLUID LEVEL IS LOW (FLUID LEAK)
HYDRAULIC SYSTEM MECHANICAL FAILURE (PRESSURE LEAK)
RDM HYDRAULIC PUMP MOTOR CONTROL CIRCUITS OPEN OR HIGH RESISTANCE
(K604) DRIVETRAIN SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE
(K604) DRIVETRAIN SIGNAL CIRCUIT SHORTED TO VOLTAGE
(K604) DRIVETRAIN SIGNAL CIRCUIT SHORTED TO ANOTHER CIRCUIT
(K504) DRIVETRAIN 5-VOLT SUPPLY CIRCUIT OPEN OR HIGH RESISTANCE
(K594) DRIVETRAIN SENSOR RETURN CIRCUIT OPEN OR HIGH RESISTANCE
RDM HYDRAULIC PRESSURE SENSOR
RDM HYDRAULIC PUMP MOTOR
RDM
DRIVETRAIN CONTROL MODULE (DTCM)

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  .