Fendt 1.2.03 – A051 - ECU, Engine Control Unit (EDC 7): B092 - Sensor, charge air pressure/temperature fault

The fault indicates a cable break or short circuit in the charge air temperature circuit, or that the charge air temperature is above the setpoint value. The engine control unit will enforce a 'Reduced power' state to protect the engine.

• 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 300 Vario (COM III)
• Fendt 400 Vario (COM III)
• Fendt 700 Vario (COM III)
• Fendt 800 Vario (COM III / S4)
• Fendt 900 Vario (COM III / S4 / Gen6)

1. 1

   Use the SERDIA or Fendias diagnostic tool to read out the specific KWP code (associated FC codes are 0095, 0096).

2. 2

   Locate the B092 combi-sensor on the front of the engine (Separation point X1661).

3. 3

   Check the 4-pin connector wiring (refer to wiring diagram Sheet 36) for a cable break or short circuit. Pinout: Pin 1 (Ground), Pin 2 (Signal temperature), Pin 3 (Supply), Pin 4 (Signal pressure).

4. 4

   Turn the ignition on and verify sensor operation. If the wiring is intact but the sensor is not reporting correctly to the ECU, the sensor has failed.

1. 1

   Locate sensor

   Turn off the tractor and locate the B092 sensor on the front of the engine.

2. 2

   Disconnect harness

   Disconnect the 4-pin harness at separation point X1661.

3. 3

   Inspect and repair wiring

   Inspect the harness and connector for corrosion, chafing, or broken wires. Repair or replace the connection cable if damage is found.

4. 4

   Replace sensor

   If the wiring tests good, remove the faulty B092 charge air pressure/temperature sensor and install the replacement.

5. 5

   Reconnect harness

   Reconnect the 4-pin harness.

6. 6

   Connect diagnostic tool

   Connect the SERDIA / Fendias diagnostic tool to the tractor.

7. 7

   Clear fault codes

   Clear the stored fault codes (FC:0095, 0096) from the engine control unit memory. Note: The documentation explicitly states that 1.2.xx errors must be manually deleted in the engine control unit following error correction with SERDIA.