CLAAS Id775Eh / 775Eh (653 13) – Engine Control Module / ENG (A15): QR code non valid of the electronic injector of cylinder n°3

The Engine Control Unit (ECU) requires a specific calibration code (QR code/trim code) for each individual fuel injector to know its exact fuel flow characteristics. This fault triggers when the ECU detects that the QR code programmed for cylinder #3 is invalid, missing, or does not match the expected format. As a result, the engine may run with difficulty, misfire, or experience degraded power due to the invalid calibration of the injector.

• Axion 810
• Axion 820
• Axion 830
• Axion 840
• Axion 850
• Axion 960
• Arion 410
• Arion 430
• Arion 510
• Arion 640
• Jaguar

1. 1

   Verify recent service history to check if the injector on cylinder #3 (Y320-3) or the Engine ECU (A15) was recently replaced or reprogrammed

2. 2

   Inspect the physical injector on cylinder #3 and locate its printed QR code/trim code

3. 3

   Connect a diagnostic tool and verify the injector calibration code currently stored in the ENG (A15) module for cylinder #3, comparing it against the physical code

4. 4

   Verify the compatibility of the ECU program versions, settings, and calibration files

1. 1

   Connect Diagnostic Equipment

   Hook up a compatible diagnostic tool (such as CLAAS CDS or a heavy-duty scanner with injector coding capabilities) to the tractor's diagnostic port.

2. 2

   Input Calibration Data

   Navigate to the Engine ECU (A15) injector calibration/coding menu. Manually enter the correct QR code read from the cylinder #3 injector into the system.

3. 3

   Save and Reset

   Save the calibration. Some systems require a "Cylinder Balancing" reset or an adaptive factor reset after new trim codes are programmed.

4. 4

   Replace Injector (If Necessary)

   If the QR code is correct but the ECU continuously rejects it, or if the injector has failed internally, the electronic injector (Y320-3) must be replaced.

5. 5

   Program New Injector

   If a replacement is installed, you must program the new injector's unique QR code into the ECU.

6. 6

   Clear Codes and Test

   Clear the active Id775Eh / 653 13 fault code. Test run the tractor under load to ensure the engine runs smoothly without misfires and the code does not return.