ECU 000637.06 – Current in Pump Position Sensor Too High. John Deere System Advisory.

ECU 000637.06 (ECU 637.06)

Code: 000637.06

Shortcode: 637.06


This error code, ECU 000637.06, occurs when the ECU detects high current on the pump position sensor wiring, indicating low circuit resistance, typically due to a short to ground. This fault can disrupt accurate readings from the pump position sensor.


The ECU may modify engine operations to compensate for the erroneous sensor data and protect engine components from potential damage.


  • Inspect for Short Circuits: Examine the wiring for the pump position sensor for signs of shorts to ground or other conductive surfaces.
  • Measure Circuit Resistance: Use diagnostic tools to confirm low resistance in the circuit and locate the short.
  • Repair or Replace Damaged Wiring: Correct any identified issues by repairing or replacing faulty wiring or connectors.
  • Confirm Sensor Functionality: Test the sensor after repairs to ensure it provides accurate data to the ECU.
  • Reset ECU and Conduct System Tests: After resolving the issue, reset the ECU and perform comprehensive tests to ensure the system operates without further errors.


Proper maintenance of sensor wiring and connections is vital to prevent short circuits and ensure accurate sensor data.

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