WOMS
U code network Medium severity

U059F Invalid Data Received From NOX Sensor "B

The OBD2 code U059F indicates that the vehicle's control module has received invalid or corrupted data from the NOx sensor "B," which may affect emissions monitoring and performance

Definition

The OBD2 code U059F indicates that the vehicle's control module has received invalid or corrupted data from the NOx sensor "B," which may affect emissions monitoring and performance

Common causes

  • Faulty NOX sensor "B"
  • Wiring issues or damaged connectors
  • Poor electrical connections
  • Corroded terminals
  • Faulty engine control module (ECM)
  • Software issues or outdated firmware
  • Exhaust system leaks
  • Incorrect sensor calibration or installation

Common misdiagnoses

  • Faulty NOX sensor
  • Wiring issues or short circuits
  • Faulty engine control module (ECM)
  • Exhaust system leaks
  • Incorrectly calibrated sensors
  • Software issues or updates needed
  • Faulty connectors or terminals
  • Other sensor failures (e.g., oxygen sensors)

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 Wiring and Connectors

    Visually inspect the wiring and connectors associated with the NOx sensor "B." Look for signs of damage, corrosion, or loose connections

  3. 3. Ensure that the connectors are securely attached and that there are no bent pins

  4. 4. Test the NOx Sensor

    If possible, test the NOx sensor "B" using a multimeter or an oscilloscope to check its output voltage and response to changes in exhaust conditions

  5. 5. Compare the readings with the specifications provided by the manufacturer

  6. 6. Check for Exhaust Leaks

    Inspect the exhaust system for any leaks that could affect the performance of the NOx sensor. Exhaust leaks can lead to incorrect readings

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

    Check for any signs of damage or corrosion on the ECM connectors

  8. 8. Ensure that the ECM is functioning properly and that it is receiving power and ground as required

  9. 9. Update or Reprogram the ECM

    In some cases, a software update or reprogramming of the ECM may be necessary to resolve communication issues

  10. 10. Clear Codes and Test Drive

    After performing any repairs or adjustments, clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive to see if the code returns

  11. 11. Consult Technical Service Bulletins (TSBs)

    Check for any TSBs related to the NOx sensor or the specific vehicle make and model. Manufacturers may have issued guidance on common issues and fixes

  12. 12. Seek Professional Help

    If the issue persists after performing the above steps, it may be necessary to consult a professional mechanic or technician who has experience with the specific vehicle and its systems.Conclusion Troubleshooting OBD-II code U059F involves a systematic approach to identify and resolve issues with the NOx sensor "B" and its communication with the ECM. Following these steps can help pinpoint the problem and restore proper functionality