Komatsu Error Code E14 - Engine Over-speed

Komatsu Heavy Equipment Critical Engine

Model: Komatsu Construction Equipment | Code: E14

Applicable Systems
PC200 Excavator

Symptoms

The Komatsu equipment displays error code E14 on the monitor panel. Engine Over-speed has been detected. The warning lamp illuminates and the equipment may enter derate or shutdown mode depending on severity.

Possible Causes

  • Engine Over-speed - sensor or component failure
  • Wiring harness or connector fault
  • ECM or controller internal fault
  • Fluid level, pressure, or temperature out of specification
  • Mechanical failure of related component

Troubleshooting Steps

  1. Step 1: Connect Komatsu PC-based diagnostic tool (KOMTRAX) and read all active and historical codes
    All codes are retrieved with timestamps
  2. Step 2: Inspect wiring harness and connectors for the related system
    No damage, corrosion, or loose connections found
  3. Step 3: Use a multimeter to check sensor signals, actuator circuits, and power supplies per Komatsu service manual
    Values are within specification
  4. Step 4: Check fluid levels, pressures, and temperatures as applicable to the code
    Fluids are at proper level and condition
  5. Step 5: Clear codes and operate equipment to verify repair
    Code does not return and system operates normally

How to Reset

To reset Komatsu code E14: 1) Repair the underlying fault. 2) Use the diagnostic tool to clear the code. 3) Cycle the key switch. 4) Operate equipment to verify. Caution: Ensure root cause is resolved before clearing.

Frequently Asked Questions

  • Q: What does Komatsu code E14 mean?

    Code E14 indicates: Engine Over-speed. This is a Komatsu KOMTRAX diagnostic code related to Engine.

  • Q: How serious is Komatsu code E14?

    Severity: Critical. Stop operation immediately.

Related Komatsu Fault Codes

Source: Komatsu Service Manual / KOMTRAX Diagnostic System - verified via BING International

Category: Heavy Equipment