Komatsu Fault Code

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E15

Loss of Power. Engine stalls when the operator moves the joysticks.

System

Hydraulics

Symptom

Loss of Power. Engine stalls when the operator moves the joysticks.

Diagnosis & fix steps

Engine Speed Sensor (Revolution) Fault. LOGIC: ECM/Pump Controller sees 0 RPM while the engine is running. ACTION: Inspect the speed sensor on the flywheel housing.

Red Seal field insights

In the Philippines, the humid/salt-air environment causes the sensor connectors to corrode. Pro-Tip: Check the "air gap" between the sensor and the flywheel gear. If it's too wide, the signal drops out when the engine vibrates under load.

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.

Book an uptime review

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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