CCU 000100.04 – Engine Oil Pressure Signal Out of Range Low

CCU 000100.04 (CCU 100.04)

Code: 000100.04

Shortcode: 100.04


This fault code is triggered when the Chassis Control Unit (CCU) detects that the engine oil pressure signal is lower than the normal operating range. This condition indicates that the oil pressure is insufficient for safe engine operation.


The engine’s functionality is degraded to prevent potential damage due to low oil pressure.


  • Verify Oil Level:
    • Check the engine oil level and top up if necessary.
  • Inspect Oil Pressure Sensor and Wiring:
    • Examine the oil pressure sensor and associated wiring for any signs of damage or faults. Repair or replace as needed.
  • Test Oil Pressure:
    • Use a manual oil pressure gauge to verify the actual oil pressure. Compare it with the sensor readings to ensure accuracy.
  • Inspect Oil Pump:
    • Check the oil pump for proper operation and replace it if it is not functioning correctly.
  • System Reset and Monitoring:
    • After resolving the issue, reset the CCU and monitor the oil pressure to ensure it stays within the normal range.


Regular maintenance of the oil pressure sensor and the oil pump is essential for preventing low oil pressure conditions and ensuring the engine operates safely.

Control Units: John Deere

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