WOMS
U code network Medium severity

U059E Invalid Data Received From NOX Sensor "A

The OBD2 code U059E indicates that the vehicle's control module has received invalid or corrupted data from the NOx (Nitrogen Oxide) sensor "A."

Definition

The OBD2 code U059E indicates that the vehicle's control module has received invalid or corrupted data from the NOx (Nitrogen Oxide) sensor "A."

Common causes

  • Faulty NOX sensor
  • Wiring issues or damaged connectors
  • Poor electrical connections
  • Corroded terminals
  • Software or calibration issues in the engine control module (ECM)
  • Exhaust system leaks
  • Faulty ECM or control module
  • Interference from other sensors or components

Common misdiagnoses

  • Faulty NOX sensor
  • Wiring issues or damaged connectors
  • Faulty engine control module (ECM)
  • Exhaust system leaks
  • Incorrectly calibrated sensors
  • Software issues in the ECM
  • Other sensor failures (e.g., oxygen sensors)
  • Fuel system problems
  • Air intake issues
  • EGR system malfunctions

Troubleshooting steps

  1. 1. Check for Additional Codes

    Use an OBD-II scanner to check for any other related trouble codes. This can provide more context and help identify if there are other issues present

  2. 2. Inspect the NOX Sensor

    Visual Inspection: Check the NOX sensor and its wiring for any visible damage, corrosion, or loose connections

  3. 3. Connector Check

    Ensure that the electrical connector to the NOX sensor is secure and free of dirt or corrosion

  4. 4. Test the NOX Sensor

    If possible, test the NOX sensor using a multimeter or an oscilloscope to ensure it is functioning correctly. Refer to the vehicle’s service manual for specific testing procedures and specifications

  5. 5. Check Wiring and Connectors

    Inspect the wiring harness leading to the NOX sensor for any signs of wear, fraying, or damage

  6. 6. Check for continuity in the wires and ensure there are no shorts to ground or open circuits

  7. 7. Examine the Engine Control Module (ECM)

    Ensure that the ECM is functioning properly. Sometimes, a faulty ECM can lead to incorrect data being received from sensors

  8. 8. Check for any software updates or reprogramming that may be required for the ECM

  9. 9. Clear Codes and Test Drive

    After performing inspections and repairs, clear the trouble codes using the OBD-II scanner

  10. 10. Take the vehicle for a test drive to see if the code reappears. Monitor the NOX sensor data with a scanner if possible

  11. 11. Check for Exhaust Leaks

    Inspect the exhaust system for any leaks that could affect the NOX sensor readings. Exhaust leaks can lead to incorrect readings and trigger codes

  12. 12. Review Vehicle Technical Service Bulletins (TSBs)

    Check for any TSBs related to the NOX sensor or the specific vehicle model. Manufacturers may have issued updates or fixes for known issues

  13. 13. Consult Professional Help

    If the issue persists after performing the above steps, consider consulting a professional mechanic or technician who has experience with your specific vehicle make and model

  14. 14. Replace the NOX Sensor

    If all other checks are satisfactory and the sensor is still not functioning correctly, it may be necessary to replace the NOX sensor.Conclusion By following these troubleshooting steps, you can systematically identify and resolve the issue related to the U059E code. Always refer to the vehicle’s service manual for specific procedures and specifications related to your vehicle