This procedure covers the following diagnostic trouble code:
Note: The following code may not be applicable for certain applications.
|Diagnostic Trouble Codes|
|CDL Code||J1939 Code||Description
(code descriptions may vary)
|E994 (2)||Low Crankcase Pressure||The Engine Control Module (ECM) activates this code when the crankcase pressure has been below the minimum value for a programmed time period. The amber warning lamp is illuminated. The code is logged. Engine power is derated.|
Illustration 1 g02211761
Typical crankcase ventilation system
(1) Crankcase pressure sensor
(3) Filter housing
(4) Fumes disposal tube
Illustration 2 g02013955
Left side of the engine
(5) Check valve
The oil fill cap is off.
The oil level gauge (dipstick) is not fully seated.
The vent filter for the crankcase is not installed.
The tube between the breather and the breather canister is not connected.
The engine is equipped with an open crankcase ventilation system.