Fendt 1.2.00 – A051 - ECU, engine control unit (EDC 7): Original error, Deutz

A generic pointer code generated by the tractor's main system indicating that the engine control unit has detected an internal fault and logged its own specific Deutz engine error code.

• 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)
• Fendt 900 Vario (COM III)

1. 1

   Do not replace parts based solely on code 1.2.00.

2. 2

   Connect a compatible diagnostic interface (such as the AGCO 2x4 CANUSB tool) to the tractor.

3. 3

   Use SERDIA (the official Deutz engine diagnostic software) or FENDIAS to communicate directly with the A051 Engine Control Unit.

4. 4

   Read the specific Deutz fault code(s) stored in the EDC 7 module to identify the actual failing component (e.g., boost pressure sensor, fuel injector, etc.).

1. 1

   Read the Sub-Code

   Hook up the laptop with Deutz SERDIA software to the tractor's diagnostic port.

2. 2

   Identify the Root Cause

   Extract the "Original error, Deutz" code from the A051 ECU.

3. 3

   Perform the Physical Repair

   Troubleshoot and replace the specific engine component, wiring harness, or sensor dictated by the Deutz-specific fault code.

4. 4

   Clear the Code

   The Fendt manual explicitly states: "If the following errors occur (1.2...), they must be deleted in the engine control unit following error correction with SERDIA!"

5. 5

   Verify

   Cycle the tractor's key power and verify that code 1.2.00 no longer populates on the instrument cluster.