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Home >> Jeep >> 2009 >> Commander Overland, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 128 (Final Drive Control Module (FDCM) - Electrical Diagnostics) >> DTC Troubleshooting >> C1438-Transfer Case Differential Clutch Worn >> Possible Causes
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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 
(K504) DRIVETRAIN 5 VOLT SUPPLY CIRCUIT OPEN OR HIGH RESISTANCE
(T313) MODE SENSOR SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE
(K594) DRIVETRAIN SENSOR RETURN CIRCUIT OPEN OR HIGH RESISTANCE
TRANSFER CASE CLUTCH
FINAL DRIVE CONTROL MODULE (FDCM)