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Possible Causes

WARNING: This page is about a different car, the 2009 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes 
(T306) FRONT DIFFERENTIAL SOLENOID CONTROL CIRCUIT SHORTED TO BATTERY VOLTAGE
(T306) FRONT DIFFERENTIAL SOLENOID CONTROL CIRCUIT SHORTED TO THE (T301) SWITCHED BATTERY SOLENOID SUPPLY CIRCUIT
FRONT DIFFERENTIAL SOLENOID
FINAL DRIVE CONTROL MODULE (FDCM)
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