Crankcase Ventilation Monitor
WARNING: This page is about a different car, the 2020 Ford F-550 Super Duty, 2020 Ford F-450 Super Duty, 2020 Ford F-350 Super Duty, 2020 Ford F-250 Super Duty, and 2020 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
The crankcase ventilation monitor is an on board strategy designed to detect leaks in the crankcase ventilation system. The monitor can detect concerns with the crankcase ventilation system such as:
- disconnected crankcase ventilation hose
- disconnected crankcase ventilation sensor
- large air leak in the intake air system
- cracked or disconnected crankcase ventilation oil separator unit
If the difference between the desired mass air flow and the actual mass air flow is greater than a calibrated threshold a DTC may set.