ISBe/ISB Series Engines – Lubricating Oil Pressure Low

Electronic fault codes are active

For instructions on how to read active fault codes, refer to Diagnostic Fault Codes in Section 1. If fault codes are active, contact a Cummins Authorized Repair Facility.

Lubricating oil pressure switch, gauge, or sensor is malfunctioning or is notin the correct location

Check the oil pressure switch, gauge, or sensor for correct operation and location. Refer to the OEM service manual.

Lubricating oil level is above or below specification

Check the oil level. Add or drain oil, if necessary. Refer to Section 5.

Lubricating oil leak (external)

Inspect the engine for external oil leaks. Tighten the capscrews, pipe plugs, and fittings. Replace gaskets, if necessary. Refer to the Lubricating Oil Contaminatedsymptom tree.

Lubricating oil does not meet specifications for operating conditions

Change the oil and filters. Refer to Section 5. Use the oil recommended in Section V.

Lubricating oil is contaminated with coolant or fuel

Change the oil and filters. Refer to the Lubricating Oil Specifications and Recommedations in Section V. It is recommended to change the oil and filter(s).

Engine angularity during operation exceeds specification

Refer to the Engine Specification Data Sheet.

Lubricating oil filter is plugged

Change the oil and filter. Refer to Section 5.