ECU 001172.03 – Turbocharger Compressor Inlet Temperature Sensor Input Voltage Too High. John Deere System Advisory.

ECU 001172.03 (ECU 1172.03)

Code: 001172.03

Shortcode: 1172.03


Error code ECU 001172.03 is triggered when the ECU detects that the input voltage from the turbocharger compressor inlet temperature sensor exceeds the specified high voltage limit. This condition suggests a potential short to a higher voltage or a malfunctioning sensor.


The ECU may adjust engine parameters to prevent potential damage due to incorrect temperature readings, which can affect turbocharger and engine performance.


  • Inspect Sensor and Wiring: Check the turbocharger compressor inlet temperature sensor and its wiring for signs of damage, corrosion, or loose connections that could cause high voltage readings.
  • Measure Sensor Voltage: Use a multimeter to measure the voltage at the sensor terminals and compare it to the expected range. High readings indicate an issue.
  • Check for Short Circuits: Inspect the wiring for any signs of shorts to higher voltage sources. Pay close attention to the sensor’s harness and connectors.
  • Replace Faulty Sensor: If the sensor is found to be defective, replace it with a new one to ensure accurate temperature readings.
  • Reset ECU and Verify Operation: After making the necessary repairs, reset the ECU to clear the error code and test the system to confirm that the sensor operates correctly and no further errors are detected.


Accurate temperature readings are crucial for optimal turbocharger and engine performance. Regular inspection and timely maintenance of sensors and wiring can help prevent voltage-related issues.

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