Description:

This diagnostic code, ECU 002791.03, is set when the EGR valve position signal exceeds the highest permissible limit, indicating a potential electrical or mechanical fault in the EGR valve system.

Reaction:

The ECU may take protective actions such as modifying engine parameters to prevent potential damage due to improper EGR operation.

Recommendations:

• Diagnose EGR Valve Sensor: Inspect the EGR valve sensor for faulty wiring or sensor failure that could cause erroneous high signals.
• Check EGR Valve Operation: Ensure that the EGR valve operates smoothly and accurately reflects sensor readings.
• Replace Faulty Sensor or Wiring: If the sensor or wiring is found to be defective, replace them to restore accurate monitoring and control of the EGR valve.
• Reset ECU and Test System: After fixing the issues, reset the ECU to clear the fault codes and perform thorough testing to ensure the EGR system functions correctly without signal anomalies.

Note:

Accurate signaling from the EGR valve sensor is crucial for the proper operation of the EGR system. Ensure sensor integrity and proper wiring to maintain effective emission control and engine performance.