Fendt 0.1.54 – Instrument Cluster (Dashpanel / A007): B019 - Compressed air tank pressure sensor (Trailer brake air supply pressure sensor) fault

Sensor fault, wiring fault, or 12 V supply fault causing the system to lose electronic feedback regarding the pneumatic trailer brake air supply, resulting in a 'No display' symptom for the compressed air indicator on the dashboard.

• 409 Vario
• 410 Vario
• 411 Vario
• 412 Vario
• 711 Vario
• 712 Vario
• 714 Vario
• 715 Vario
• 716 Vario
• 717 Vario
• 718 Vario
• 916 Vario
• 920 Vario
• 924 Vario
• 926 Vario
• 930 Vario
• 411 Vario COM III
• 412 Vario COM III
• 413 Vario COM III
• 414 Vario COM III
• 415 Vario COM III
• 712 Vario COM III
• 714 Vario COM III
• 716 Vario COM III
• 718 Vario COM III
• 818 Vario COM III
• 820 Vario COM III
• Fendt Farmer 400
• Fendt Favorit 700
• Fendt Favorit 900
• Fendt 300 Vario (including COM III)
• Fendt 400 Vario (including COM III and S4 generations)
• Fendt 500 Vario (including COM III and S4 generations)
• Fendt 700 Vario (including COM III and S4 generations)
• Fendt 800 Vario (including COM III and S4 generations)
• Fendt 900 Vario (including COM III and S4 generations)

1. 1

   Check the 12V supply to verify that the sensor is receiving power from the instrument cluster harness

2. 2

   Inspect the wiring harness and connectors between the B019 sensor and the dashpanel for chafed wires, broken pins, or corrosion

3. 3

   Verify physical air pressure to ensure the air compressor is building pressure in the tank (typically up to 8.1 bar) to rule out a mechanical pneumatic failure

4. 4

   Use the FENDIAS diagnostic tool to monitor the live voltage output of the B019 sensor to confirm if the signal is dead or out of range

1. 1

   Depressurize the System

   Safely park the tractor on level ground. Completely drain/relieve the compressed air from the storage tank before attempting to remove the sensor to prevent injury.

2. 2

   Locate the Sensor

   Locate the B019 pressure sensor, which threads directly into the compressed air supply line or the air tank.

3. 3

   Disconnect Electronics

   Unplug the electrical connector from the sensor.

4. 4

   Remove the Sensor

   Unscrew the faulty sensor from the pneumatic port.

5. 5

   Clean the Port

   Ensure the threads and the air line are clean and free of debris, as contaminated air systems can cause premature sensor failure.

6. 6

   Install the New Sensor

   Thread the new OEM pressure sensor into the port and tighten to the manufacturer's torque specification.

7. 7

   Reconnect and Test

   Reconnect the wiring harness. Start the tractor and allow the air compressor to build up pressure.

8. 8

   Verify Operation

   Check for air leaks around the new sensor's threads. Verify that the compressed air indicator on the dashpanel is now functioning. Clear the 0.1.54 fault code using the FENDIAS system.