Crankcase Ventilation Monitor
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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.