C13 and C15 On-highway Engines Caterpillar

Oil Pressure Is Low

Usage:

C15 B5R

Use this procedure to troubleshoot a low oil pressure condition. Also, this procedure covers the following codes:

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Table 1
Diagnostic Trouble Codes
J1939 Code	Description	Information
100-17	Engine Oil Pressure : Low - Least Severe (1)	For both C13 and C15, oil pressure is below a minimum value for at least 8 seconds. A snapshot is triggered. The code is logged. Engine performance is not affected.
100-1	Engine Oil Pressure : Low - Most Severe (3)	For the C13, oil pressure is below a minimum value for at least 12 seconds. For the C15, oil pressure is below a minimum value for at least 8 seconds. Engine power is reduced while this condition exists. A snapshot is triggered. The code is logged. Factory passwords are required in order to clear the logged code. If the low oil pressure condition continues for more than 30 seconds and the "Engine Monitoring Mode" parameter is programmed to "Shutdown", the Engine Control Module (ECM) will shut down the engine.

Note: For the C15 two different trip lines determine the low-pressure region. The regions differ for the engine oil pressure : low - least severe (1) and the engine oil pressure : low - most severe (3) codes.

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Illustration 1	g02174764
Chart for low oil pressure for the C15 engines Trip line for engine oil pressure : low - least severe (1)

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Illustration 2	g02330014
Chart for low oil pressure for the C15 engines Trip line for engine oil pressure : low - most severe (3)

Note: For the C13 a single trip line determines the low-pressure region for both the engine oil pressure : low - least severe (1) and the engine oil pressure : low - most severe (3) codes. For the C13 the duration below the line will determine the code.

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Illustration 3	g02329039
Chart for low oil pressure for the C13 engines

Perform the following procedure:

Check the oil level. Refer to the Operation and Maintenance Manual for the correct procedure.
Test the engine oil pressure. Refer to Systems Operation/Testing and Adjusting, "Engine Oil Pressure - Test" for the correct procedure.
If the readings are low, refer to "Reasons for Low Engine Oil Pressure" in the Systems Operation/Testing and Adjusting manual. Make the necessary repairs.