Crankcase Pressure
Crankcase pressure is given on the electronic service tool display status screen. The ECM will perform any of the following functions if the crankcase pressure is high in the engine: warning, derate and shutdown. The response depends on the programming and the availability of the parameter of the monitoring system. Refer to Troubleshooting for detailed programming instructions.
Pistons or rings that have damage can be the cause of too much pressure in the crankcase. This condition will cause the engine to run rough. There will be more than the normal amount of fumes coming from the crankcase breather. This crankcase pressure can also cause the element for the crankcase breather to have a restriction in a very short time. This crankcase pressure can also be the cause of any oil leakage at the gaskets and at the seals that would not normally have leakage.
Note: The electronic service tool can be used to measure crankcase pressure.
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