ECU 000102.03 – Manifold Air Pressure Sensor High Voltage Input. John Deere System Advisory.

ECU 000102.03 (ECU 102.03)

Code: 000102.03

Shortcode: 102.03


The error code ECU 000102.03 signifies that the input voltage at the manifold air pressure sensor is excessively high, beyond the normal specifications. This condition often points to a potential short circuit to a 12-volt source. Such a voltage discrepancy can adversely affect the sensor’s ability to accurately measure air pressure in the intake manifold, which is critical for proper engine management and efficiency.


The engine control unit (ECU) may enter a protective mode to prevent engine damage due to incorrect air pressure readings. This can lead to altered engine performance, such as reduced power output or erratic operation.


  • nspect Wiring and Connectors: Check for damaged wires or loose connectors that might be causing the short to the 12-volt source. Replace or repair any compromised wiring.
  • Test Sensor Voltage: Use a multimeter to verify the voltage at the sensor. It should not exceed the manufacturer’s specified range.
  • Replace Faulty Sensor: If wiring and connectors are intact, consider replacing the manifold air pressure sensor.
  • Reset ECU and Clear Codes: After repairs, reset the ECU and clear the error code to see if the issue recurs.


Ensure that all electrical repairs adhere to safety standards to prevent further issues. A voltage issue at the sensor can sometimes be due to problems elsewhere in the electrical system, so a comprehensive check may be necessary.

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