Crankcase Pressure Is High
Troubleshooting Procedure
Use this procedure in order to troubleshoot a high crankcase pressure or use this procedure if one of the following diagnostic codes is active.
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| Diagnostic Trouble Codes | |||
|---|---|---|---|
| J1939 Code | CDL Code | Description
(code descriptions may vary) |
Comments |
| 101-0 | E1036 (3) | Engine Crankcase Pressure : High - Most Severe (3) | 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. |
| 101-15 | E1036 (1) | Engine Crankcase Pressure : High - Least Severe (1) | 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. |
| 101-16 | E1036 (2) | Engine Crankcase Pressure : High - Moderate Severity (2) | 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 breather, or an obstructed hose. |
- Engine oil level
- Faulty sensor
- Internal engine problem
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| 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. Troubleshoot the cause of the incorrect oil level. |
2. Faulty Sensor A. Connect Caterpillar Electronic Technician (ET) to the service tool connector. B. Turn the keyswitch to the ON position. Do not start the engine. C. Remove the oil filler cap. D. Monitor the crankcase pressure in Cat ET. |
Crankcase pressure sensor |
Result: The crankcase pressure reading is 0 kpa (0 in of water) ± .5 kpa (2 in of water). Proceed to Test Step 3. Result: The crankcase pressure reading is not 0 kpa (0 in of water) ± .5 kpa (2 in of water). Replace the crankcase pressure sensor. |
3. 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. 285-0901 Blowby Tool Gp (LARGE ENGINE) 2. 348-5430 Multi-Tool Gp |
Damaged or worn engine parts |
Result: Crankcase Blowby is high, and there are worn or damaged engine parts Repair or replace the worn or damaged parts. Result: Crankcase Blowby is OK. Proceed to next step |
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