John Deere 004334.03: DEF System Pressure Sensor Voltage High (ECU)

The ECU has detected a high voltage signal from the DEF System Pressure Sensor. This may indicate an issue with the sensor or its associated circuit.

1. 1

   The DEF System Pressure Sensor

2. 2

   The wiring and connections to the DEF System Pressure Sensor

3. 3

   The ECU for proper operation

1. 1

   Inspect

   Inspect the DEF System Pressure Sensor for physical damage or signs of wear.

2. 2

   Check

   Check the wiring and connections to the DEF System Pressure Sensor for looseness, corrosion, or damage.

3. 3

   Test

   Test the voltage output of the DEF System Pressure Sensor using a multimeter to confirm it is within the expected range.