Magnum Fault Code
Free · no signupLow Oil / High Temp
Engine shuts down; Red "Alarm/Fault" LED is solid.
System
Generator
Symptom
Engine shuts down; Red "Alarm/Fault" LED is solid.
Diagnosis & fix steps
Engine Safety Shutdown.
LOGIC: Physical switch closure (grounding) for low oil pressure or high coolant temperature.
ACTION: 1. Check oil/coolant levels.
2. Verify the fan belt is intact.
FIX: Top off fluids or replace the faulty safety switch.
Red Seal field insights
If levels are good, check the wire at the sender. These units are often on trailers; road vibration can rub the sender wire raw, causing it to ground against the block and trigger a false "Low Oil" shutdown.
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.
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