ECU 000103.31 – Turbocharger Speed Signal Absent. John Deere System Advisory.

ECU 000103.31 (ECU 103.31)

Code: 000103.31

Shortcode: 103.31


Error code ECU 000103.31 is reported when the ECU fails to detect any signal from the turbocharger speed sensor. This typically indicates a complete loss of connectivity, which could be due to a faulty sensor, severed wires, or disconnected components within the sensor circuit.


Without a valid turbocharger speed signal, the engine control system cannot correctly monitor or control turbocharger operations, potentially leading to unoptimized engine performance or a complete shutdown of turbo functionalities.


  • Inspect Sensor Connections: Ensure that the turbocharger speed sensor is properly connected and that the connectors are secure and free from corrosion.
  • Check Wiring for Damage: Examine the wiring harness for breaks or damage that could interrupt the signal.
  • Replace Sensor if Necessary: If connections and wiring are intact, the sensor itself may need to be replaced.
  • Reset ECU and Clear Codes: After corrective measures, reset the ECU to re-establish proper communication and clear any stored error codes.


Regular checks and maintenance of the turbocharger system can help detect and prevent issues like signal loss early, reducing downtime and repair costs.

Control Units: John Deere

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