ECU 000094.03 – Low-Pressure Fuel Signal Out of Range High. John Deere Engine Control.

ECU 000094.03 (ECU 94.03)

Code: 000094.03

Shortcode: 94.03


The ECU 000094.03 (94.03) error code on John Deere equipment indicates that the low-pressure fuel system signal is higher than expected, typically signaling a short to 12 volts. This condition can occur due to issues like damaged wiring, faulty connections, or a malfunction within the fuel sensor itself, causing the signal to exceed normal parameters and potentially leading to inaccurate fuel monitoring.


The engine control system may react to this high signal by adjusting the fuel delivery inaccurately, which could lead to inefficient engine operation or potential engine stalling under certain conditions.


  • Inspect Wiring and Connections: Examine the wiring and connectors associated with the low-pressure fuel system for signs of damage, corrosion, or improper connections that might lead to short circuits.
  • Test Fuel System Sensor: Use diagnostic tools to assess the functionality of the low-pressure fuel sensor to ensure it is operating within specified parameters.
  • Replace Damaged Components: If any damaged wires or faulty components are identified, replace them with genuine John Deere parts to ensure proper system functionality.
  • Reset and Test the System: After addressing the issue, reset the engine control system to clear the error code. Conduct thorough testing under various operating conditions to ensure that the fuel system is functioning correctly.


Regular inspection and maintenance of the fuel system’s electrical components are crucial to prevent issues like ECU 000094.03. Special attention should be given to areas prone to wear and exposure to environmental elements that can degrade wiring integrity. Implementing routine checks can help catch and correct such issues early, maintaining optimal engine performance and reliability.

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