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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 434 (6.7L Diesel - DTCS P0420 To P1208 - 2500 Hd & 3500 Hd) >> Diagnosis And Testing >> P04DB-Crankcase Ventilation System Disconnected >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK THE CRANKCASE VENTILATION HOSE 
    NOTE:

    If there are any DTCs present for the EGR Valve, EGR Airflow Control Valve, or any of the pressure sensors, perform the diagnostics for those DTCs before proceeding with this test procedure.

    1. Visually inspect the Crankcase Ventilation Hose.

      Is the hose disconnected, cracked, pinched or damaged?

      Yes 

      • Repair or replace the Crankcase Ventilation Hose in accordance with the service information.
      • Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .

      No 

      • Go To  2
  2. CHECK THE INTAKE SYSTEM FOR LEAKS 
    1. Perform the INTAKE AIR SYSTEM PRESSURE TEST diagnostic procedure. Refer to DIAGNOSIS AND TESTING, 6.7L .

      Were any Intake System leaks found?

      Yes 

      • Perform the appropriate repair. Refer to appropriate service information.
      • Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .

      No 

      • Replace the Crankcase Breather Filter in accordance with the service information.
      • Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .