Description:

This error code indicates that the EGR flow signal falls below the lower limit, suggesting a short to ground. Such a fault may result in the ECU receiving falsely low EGR flow readings, which can disrupt the proper functioning of the vehicle’s emissions system.

Reaction:

The vehicle’s control software might restrict engine performance to prevent damage from what it perceives as insufficient EGR flow.

Recommendations:

• Check EGR Sensor and Wiring: Inspect the EGR flow sensor and its wiring for any signs of damage or short circuits to ground.
• Verify Sensor Output: Measure the output voltage from the EGR flow sensor to check if it is below the normal range.
• Repair or Replace Components: Repair any damaged wiring or replace the sensor if it is found to be faulty.
• Perform System Checks: After addressing the issue, conduct a full system check to ensure that the EGR flow readings are now within the correct range and the system functions properly.
• ECU Reset and Error Clearance: Reset the ECU to clear the fault code and allow the system to reinitialize with the corrected sensor data.

Note:

Ensuring that the EGR flow sensor provides accurate readings is crucial for the correct operation of the EGR system and to meet emissions regulations. Regular checks and prompt repairs are necessary to maintain system integrity.