Description:

This fault code is logged when the DEF dosing injector fails to reach the position commanded by the ECU, potentially due to mechanical hindrance, actuator failure, or incorrect calibration.

Reaction:

The control system may attempt to reposition the injector multiple times. If unsuccessful, it might limit DEF dosing, impacting emission control efficacy.

Recommendations:

• Inspect Dosing Injector Mechanism: Examine the injector for any physical obstructions or signs of mechanical wear that could prevent it from reaching the desired position.
• Test Injector Actuation: Check the actuator’s performance to ensure it responds appropriately to control signals.
• Calibrate Injector: If the injector and actuator are functioning but not aligning correctly, recalibration may be necessary.
• Replace Faulty Injector or Actuator: If recalibration doesn’t resolve the issue, consider replacing the defective components.
• Verify System Operation: After servicing, conduct tests to ensure the injector reaches its intended positions accurately during operation.

Note:

Accurate positioning of the DEF dosing injector is essential for precise fluid delivery and optimal reduction of emissions. Regular checks and maintenance can prevent operational discrepancies.