Caterpillar Fault Code
Free · no signup3413-5
Fuel Lift Pump Failure
Variant 1
System
Electrical
Symptom
Fuel Lift Pump Failure
Diagnosis & fix steps
LOGIC: Electric Fuel Priming Pump Current Below Normal.
ACTION: Measure resistance at the priming pump motor pins. If "Open Loop," the internal motor brushes are gone.
Red Seal field insights
Location: Usually found near the primary fuel filter base.
FIX: Replace the 24V priming pump assembly.
Variant 2
System
Engine
Symptom
Rough Run / Miss
Diagnosis & fix steps
LOGIC: Ignition Coil #3 Current Below Normal.
ACTION: Measure coil primary resistance. If OL, replace coil.
Red Seal field insights
CAT 336: Check harness for heat damage near the exhaust manifold.
Variant 3
System
Aftertreatment
Symptom
Regen Fails / Engine Derate
Diagnosis & fix steps
LOGIC: ARD Fuel Flow Diverter Valve Current Below Normal (Open Circuit).
ACTION: Check for 24V supply and verify coil resistance at the actuator pins.
Red Seal field insights
Specs: 15 to 30 Ohms.
PRO-TIP: On the 336, the diverter valve is usually near the fuel manifold. If resistance is high, the internal coil is failing.
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 trial