Universal HD Fault Code
Free · no signupSPN 100 FMI 01
Immediate Engine Stop Warning / Siren
System
Lubrication
Symptom
Immediate Engine Stop Warning / Siren
Diagnosis & fix steps
LOGIC: Engine Oil Pressure Below Critical Safety Threshold.
ACTION: Shut down immediately. Verify oil sump dipstick level. Connect a mechanical oil pressure gauge to main oil rail gallery test port to verify actual mechanical pressure. If mechanical pressure is low, drop oil pan to inspect oil pump pickup tube gasket, relief valve, and bearing clearances.
Red Seal field insights
Bearing Seizure Prevention: When oil gallery pressure drops below the dynamic curve (often <10–12 PSI at idle or <30 PSI under load), the ECM trips an immediate engine stop sequence to prevent spinning crankshaft rod and main bearings.
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.
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.
Track this across your whole fleet
This code is free to read. AM Fleet Integrity lets your team log fault codes against assets, plus the full fault-code library, QR operator reporting, PM scheduling and predictive alerts. Start free — no credit card required.
Start your free trialRelated Universal HD fault codes
- SPN 102 FMI 18Black Exhaust Smoke / Sluggish Acceleration
- SPN 105 FMI 03White Smoke Cold / Harsh Cold Engine Clatter
- SPN 108 FMI 03Sluggish High Altitude Power / Rich Burn
- SPN 110 FMI 00Red Stop Lamp / Engine Fan Locked at 100%
- SPN 111 FMI 01Red Stop Lamp / 30-Second Timed Shutdown
- SPN 157 FMI 18Engine Lugs Down / Power Cuts on Pull
- SPN 1761 FMI 01Flashing DEF Lamp / Impending Speed Derate
- SPN 190 FMI 00Check Engine Solid / Historical Event Log
- SPN 3031 FMI 04DEF Warning Light / SCR Limp Mode
- SPN 3216 FMI 20Check Engine Solid / High DEF Consumption