Description:

Error code ECU 002630.03 is triggered when the input voltage to the exhaust gas recirculation (EGR) fresh air temperature sensor exceeds the maximum specified limit, indicating a short to 12 volts. This error can result in erroneous temperature readings that may affect the EGR system’s performance.

Reaction:

The ECU may modify engine performance parameters or limit functionality to prevent potential damage due to incorrect EGR operation based on faulty temperature data.

Recommendations:

• Inspect Wiring and Connectors: Check the sensor wiring and connectors for any signs of damage or corrosion that might cause a short to 12 volts.
• Measure Voltage at Sensor: Use a multimeter to measure the voltage at the sensor connection. A reading higher than specified suggests a short.
• Replace Damaged Wiring: Repair or replace any damaged wiring that could be causing the high voltage condition.
• Test or Replace Sensor: If the wiring is intact, test the sensor itself for faults. Replace the sensor if it fails the tests.
• Verify System Operation: After repairs, reset the ECU and test the EGR system under various operating conditions to ensure the sensor now functions within normal parameters.

Note:

Proper functioning of the EGR temperature sensor is crucial for maintaining efficient engine operation and compliance with emission standards. Regular checks and timely repairs are essential.