CLAAS Id776Dh / 776Dh (656 13) – ENG (A15): QR code non valid of the electronic injector of cylinder n°6.

The engine control unit expects a specific calibration code (QR code/string) for the electronic fuel injector on cylinder #6 to ensure proper fuel delivery. This fault is logged when the QR code programmed into the ECU is missing, invalid, or does not match the expected format. As a result, the engine may run with difficulty, misfire, or experience a derate due to the invalid calibration of the injector.

• Axion 810
• Axion 820
• Axion 830
• Axion 840
• Axion 850
• Axion 960
• Arion 640
• Arion 510
• Jaguar

1. 1

   Check the Engine Module ENG (A15): Verify that the ECU has the latest software version and that there are no internal memory faults.

2. 2

   Check the Electronic Injector (Component Y320-6): Inspect the physical injector on cylinder #6. Ensure the wiring harness and connectors are secure and not damaged, as communication issues can sometimes trigger calibration faults.

3. 3

   Verify the QR Code: Read the alphanumeric calibration code physically printed on the top or side of the cylinder #6 injector.

1. 1

2. 2

   Connect Diagnostic Tool

   Connect the CLAAS CDS (Computer Diagnostic System) or a compatible OEM-level diagnostic tool to the machine's diagnostic port.

3. 3

   Access the Engine ECU

   Navigate to the Engine Control Module (ENG A15) and select the injector programming/calibration menu.

4. 4

   Read and Input the QR Code

   Locate the QR code/calibration string printed on the electronic injector for cylinder #6 (Y320-6). Manually input this exact alphanumeric string into the diagnostic software.

5. 5

   Save and Clear

   Save the calibration data to the ECU. Clear the Id776Dh / 656 13 fault code.

6. 6

   Test Run

   Cycle the ignition and start the engine. Verify that the engine runs smoothly and the fault code does not return.

7. 7

   Replace if Necessary

   If the ECU refuses to accept the QR code, or if the injector is mechanically/electrically faulty, the injector (Y320-6) must be replaced. After installing the new injector, you must program its new QR code into the ECU following steps 1-4.