Fendt 0F.1.12 – Central Electrical System ECU (A038 / A111): Faulty nozzle heater

Indicates a faulty nozzle heater. This is often a 'phantom' code caused by the software looking for a circuit that was planned for production but omitted on certain chassis series (planned although not yet fitted in X900).

• 922 Vario COM III
• 924 Vario COM III
• 927 Vario COM III
• 930 Vario COM III
• 933 Vario COM III
• 936 Vario COM III
• Fendt 900 Vario (COM III) series
• Fendt 700-900 SCR series (2011.09 and newer)
• X900 chassis

1. 1

   Physically inspect the machine to verify if a nozzle heater is actually installed, as it may be a missing component rather than a broken one.

2. 2

   Call up the fault code on the multiple display to confirm it is active.

3. 3

   If the tractor has a nozzle heater installed, inspect the wiring harness between the nozzle heater and the Central Electrical System ECU (A038/A111) for open circuits, corrosion, or shorts.

1. 1

   Retrieve and Clear the Code

   Call up the fault code on the multiple display and make a note of it.

2. 2

   Terminal Deletion

   To delete fault codes from the instrument panel memory, press buttons (A), (B), and (C) (both arrow keys) simultaneously on the display.

3. 3

   FENDIAS Deletion

   If the code is stored deeper in the basic control unit (A050) or engine control ECU (A099), it cannot be deleted via the dashboard. You must connect a laptop with FENDIAS diagnostic software to clear it.

4. 4

   Address the Hardware (If Equipped)

   If the tractor is equipped with a nozzle heater and the code returns after clearing, replace the faulty nozzle heater element.

5. 5

   ECU Replacement (Worst Case)

   If the wiring is intact, the heater is functional (or intentionally missing), and the A038 Central Electrical System ECU is internally shorted or corrupted, the ECU must be replaced. Note: No repair is possible for the A038 central electrics board.