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Home >> Jeep >> 2023 >> Wagoneer Carbide, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 49 (6.4L - DTCS P0355 To P0506) >> DTC Troubleshooting >> P04FC-Crankcase Ventilation System Performance >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2023 Jeep Grand Wagoneer. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes
CRANKCASE HOSE LEAKING OR DAMAGED
INTAKE MANIFOLD LEAK
PCV VALVE

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

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