Cummins ISX11.9 CM2250 – Service Manual Lubricating Oil Temperature Above Specification

Electronic fault codes active or high counts of inactive fault codes

Refer to Fault Code Troubleshooting Manual, Bulletin 4022225.

Lubricating oil temperature sensor or circuit is malfunctioning (electronic controlled fuel system)

Check the lubricating oil temperature sensor and circuit. Refer to Procedure 019-067 in Section 19
.

Lubricating oil level is above or below specification

Check the oil level. Add or drain oil, if necessary. Refer to
Procedure 007-037 in Section 7
.

Coolant temperature is above specification

Refer to the Coolant Temperature is Above Normal – Sudden Overheat or the Coolant Temperature is Above Normal – Gradual Overheat symptom tree.

Lubricating oil thermostat is malfunctioning

Check the oil thermostat. Refer to
Procedure 007-039 in Section 7
.

Lubricating oil cooler is malfunctioning

Check the oil cooler. Refer to
Procedure 007-003 in Section 7
.