PIN 4T3551 - Caterpillar

Table 1
Event Code
Code and Description Conditions which Generate this Code System Response
E101(1) High Crankcase Pressure Warning Engine crankcase pressure is above the trip point pressure for the delay time. The code is logged. Probable Causes
Worn engine components
Plugged crankcase breatherRecommended Actions
Engine Components
Damaged pistons or rings can cause 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 (blowby) rising from the crankcase breather. The breather can then become restricted in a very short time, causing oil leakage at gaskets and seals that would not normally have leakage. Blowby can also be caused by worn valve guides or by a failed turbocharger seal.Crankcase Breather
A plugged crankcase breather will cause excessive crankcase pressure. Leakage of the crankshaft seal can occur. Sealing of the piston rings can be lost. This will enable crankcase blowby to further increase the crankcase pressure.The 285-0910 Multi-Tool Gp is used to check the amount of blowby.