Cummins N14 STC, Celect, Celect Plus – Service Manual Lubricating Oil Pressure High

Electronic fault codes active or high counts of inactive fault codes

Refer to Section TF in the CELECT Plus™ Systems Troubleshooting and Repair Manual, Bulletin 3666130, or Section TF in the CELECT™ Systems Troubleshooting and Repair Manual, Bulletin 3666084.

Lubricating oil pressure switch, gauge, or sensor is malfunctioning or is not in the correct location.

Check the oil pressure switch, gauge, or sensor for correct operation and location. Refer to Procedure 007-028 in Section 7.

Coolant temperature is below specification

Refer to the Coolant Temperature Below Normal troubleshooting symptom tree in Section TS..

Lubricating oil does not meet specifications for operating conditions

Change the oil and filters. Refer to Procedure 007-013 in Section 7. Use the oil type recommended in Section V of the operation and maintenance manual.

Main oil pressure regulator is malfunctioning

Check the main oil pressure regulator assembly. Refer to Procedure 007-029 in Section 7.

Lubricating oil viscosity not correct

Make sure the correct lubricating oil is being used. Refer to Procedure 007-041 in Section 7.

Lubricating oil high?pressure relief valve is malfunctioning

Remove and inspect the high?pressure relief valve or lubricating pump pressure regulator. Refer to Procedure 007-021 in Section 7.

Lubricating oil filter bypass valve is malfunctioning

Check the bypass valve. Refer to Procedure 007-014 in Section 7.