What does Cummins fault code Cummins 119 (SPN 135 FMI 4) mean?

Q: What does Cummins fault code Cummins 119 (SPN 135 FMI 4) mean?

Cummins 119 (SPN 135 FMI 4) indicates: Low oil pressure alarm; 0 PSI on gauge; Engine may shutdown automatically. Fix: Oil Pressure Voltage Low. LOGIC: Signal < 0.5V (Short to Ground). The ECM expects a base voltage even at 0 PSI. A drop below 0.5V indicates the signal is touching ground. ACTION: 1. Check oil level/dipstick (Safety First). 2. Unplug sensor; if code becomes FMI 3, wiring is good, sensor is dead. 3. Check for 5V ref on Pin A. FIX: Replace Oil Pressure Sensor or repair signal wire rub-point.

Cummins Fault Code

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Cummins 119 (SPN 135 FMI 4)

Low oil pressure alarm; 0 PSI on gauge; Engine may shutdown automatically.

System

Not specified

Symptom

Low oil pressure alarm; 0 PSI on gauge; Engine may shutdown automatically.

Diagnosis & fix steps

Oil Pressure Voltage Low. LOGIC: Signal < 0.5V (Short to Ground). The ECM expects a base voltage even at 0 PSI. A drop below 0.5V indicates the signal is touching ground. ACTION: 1. Check oil level/dipstick (Safety First). 2. Unplug sensor; if code becomes FMI 3, wiring is good, sensor is dead. 3. Check for 5V ref on Pin A. FIX: Replace Oil Pressure Sensor or repair signal wire rub-point.

Red Seal field insights

If you are stuck in a dangerous spot and need to move the machine, unplugging the sensor sometimes defaults the ECM to a "safe" pressure value, allowing you to limp it out of the way.

Same code keeps coming back?

That's a program problem, not a part problem. Book a 30-minute uptime review with Grant, a Red Seal Heavy Duty Technician.

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Read before you touch anything

This is general reference information, not a repair manual. It is for trained, qualified technicians.
Fault codes, meanings and procedures vary by model, serial number and software version. Confirm the code and the procedure against the manufacturer's service manual before acting.
Follow the OEM service manual, torque specs and your site's safety procedures: lockout/tagout, block raised equipment, relieve hydraulic, fuel and air pressure, and let hot systems cool.
You use this information at your own risk. Adventure Mechanical and AM Fleet Integrity accept no liability for damage, injury, downtime or loss arising from its use.
Not affiliated with or endorsed by any manufacturer. Brand names are used only to identify the equipment a code applies to.

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