ECU 000101.06 – Engine Crankcase Pressure Signal Out of Range High. John Deere Engine Control.

ECU 000101.06 (ECU 101.06)

Code: 000101.06

Shortcode: 101.06


The ECU 000101.06 (101.06) error code alerts that the engine crankcase pressure sensor signal is abnormally high, suggesting a short to 12 volts within the sensor’s circuit on John Deere equipment. This fault indicates an electrical issue that causes the sensor to output excessively high values, which do not accurately represent the actual crankcase pressure. This could potentially lead to the engine control system misinterpreting the condition of the engine, affecting its operational decisions. Consultation with the relevant Component Technical Manual (CTM) for specific diesel engines is advised to obtain detailed diagnostic procedures.


The engine control system may respond to this faulty signal by taking precautionary measures such as reducing engine power or issuing warnings, under the assumption that the crankcase pressure is critically high.


  • Consult the Component Technical Manual (CTM): Refer to the specific CTM for your engine to follow the exact diagnostic procedures recommended for this error code.
  • Inspect Wiring and Electrical Connections: Thoroughly check the wiring and connections of the crankcase pressure sensor for signs of damage or poor insulation that could lead to a short to 12 volts.
  • Test the Crankcase Pressure Sensor: Utilize diagnostic equipment to assess whether the high reading is due to an actual short or another issue within the circuitry.
  • Replace Faulty Sensor or Repair Wiring: If any issues with the sensor or wiring are identified, replace the faulty components with genuine John Deere parts to ensure system integrity.
  • Reset the System and Verify Functionality: After addressing the issue, reset the engine control unit to clear the error code, and perform a comprehensive test to ensure the crankcase pressure readings now reflect accurate engine conditions.


Proper functioning of the crankcase pressure sensor is crucial for maintaining engine health. Electrical faults such as shorts can significantly impact the accuracy of sensor readings, leading to inappropriate engine control actions. Regular maintenance and timely repairs are vital to ensure that such issues do not compromise engine performance or safety. Additionally, ensuring that all engine sensor circuits are well-maintained and free from electrical faults helps prevent similar problems in the future.

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