No clicking noise is heard and no air mass flow occurs. | Possible faults: |
Faulty air supply valve. | |
Faulty dosing module. | |
Clicking noise is heard, but no air mass flow occurs. | Possible faults: |
No air supply from circuit 4. | |
Clogged air/oil separator. | |
Faulty dosing module. | |
Clogged AdBlue line. | |
Faulty air supply valve. |