C13 Engines for Caterpillar Built Machines Caterpillar

The engine is equipped with an open crankcase ventilation (OCV) system. Refer to Illustration 1. The pressure sensor monitors the level of crankcase pressure. The OCV system on certain engines contains a filter element. Tubing routes the blowby from the OCV system to the filter housing. The filter housing contains a filter element. The filter element filters the blowby. Refer to the Operation and Maintenance Manual for the replacement of the filter.

Troubleshooting Procedure

Reset all active codes and clear all logged codes.

Use this procedure to troubleshoot a high crankcase pressure or use this procedure if one of the following diagnostic codes is active.

Table 1

Diagnostic Trouble Codes
CDL Code	Description (code descriptions may vary)	Comments
E1036 (1)	High Crankcase Pressure	The Engine Control Module (ECM) activates this code when the crankcase pressure has exceeded the limit for a programmed time period. The amber warning lamp is illuminated. The code is logged. Engine power is derated. This code can be caused by an obstructed tube, an obstructed filter (If Equipped), or an obstructed hose. Also, a plugged OCV system will cause the code.
E1036 (2)	High Crankcase Pressure	The ECM activates this code when the crankcase pressure has exceeded the limit for a programmed time period. The amber warning lamp is illuminated. The code is logged. Engine power is severely derated. This code can be caused by an obstructed tube, an obstructed filter (If Equipped), or an obstructed hose. Also, a plugged OCV system will cause the code.

Illustration 1	g02211761
(1) Crankcase pressure sensor (2) Crankcase filter housing (If Equipped) (3) Fumes disposal tube (4) Oil drain tube

Illustration 2	g02013955
Left side of the engine (5) Check valve

Probable Causes

• Engine oil level

• Plugged OCV system

• Faulty check valve

• Faulty sensor

• Worn engine components

Recommended Actions

Table 2

Troubleshooting Test Steps	Values	Results
1. Check the Engine Oil Level A. Check the engine oil level.	Engine Oil Level	Result: The engine oil level is OK. Proceed to Test Step 2. Result: The engine oil level is high. Repair: Troubleshoot the cause of the incorrect oil level.
2. Plugged OCV System A plugged OCV system will cause excessive crankcase pressure. A. Check the OCV (If Equipped) for plugging.	Plugged OCV	Result: The OCV is plugged. Repair: Replace the fumes disposal filter (If Equipped) according to the Operation and Maintenance Manual, "Fumes Disposal Filter Element - Replace". Result: The OCV is not plugged. Proceed to Test Step 3.
3. Faulty Check Valve A faulty check valve can cause excessive crankcase pressure. A faulty check valve will not allow the crankcase to vent properly.	Check Valve	Result: The check valve was faulty. Repair: Replace the check valve. Verify that the problem is resolved. If the problem is not resolved, Proceed to Test Step 4.
4. Plugged Oil Disposal Tube A plugged disposal tube will not allow the crankcase to vent properly. A. Check the disposal tube for obstructions.	Plugged Oil Disposal Tube	Result The oil disposal tube is obstructed. Repair: Clean any obstructions from the tube. Result The oil disposal tube is not obstructed. Proceed to Test Step 5.
5. Faulty Sensor A. Connect Cat Electronic Technician (ET) to the service tool connector. B. Turn the keyswitch to the ON position. Do not start the engine. Remove the oil filler cap. Monitor the crankcase pressure in Cat ET.	Crankcase Pressure Sensor	Result The crankcase pressure reading is 0 kpa (0 inches of water) ± .5 kpa (2 inches of water). Proceed to Test Step 6. Result The crankcase pressure reading is not 0 kpa (0 inches of water) ± .5 kpa (2 inches of water). Repair: Replace the crankcase pressure sensor.
6. Internal Engine Problem 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 quantity of fumes (blowby) entering the OCV system. The OCV system can then more quickly become restricted, 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. A. To determine whether the piston rings leak, measure the crankcase blowby. Use the following service tools, along with Software License, NETG5044: 1. 285-0900 Blowby Tool Gp (SMALL ENGINE) 2. 348-5430 Multi-Tool Gp	Damaged or Worn Engine Parts	Result There are worn or damaged engine parts. Repair: Repair or replace the worn or damaged parts.

If the procedure did not correct the issue, contact your Cat dealer Technical Communicator (TC). For further assistance, your TC can confer with the Dealer Solutions Network (DSN).