WOMS
U code network Medium severity

U058B ISO/SAE Reserved

The OBD2 code U058B indicates a communication issue with a reserved ISO/SAE network, typically related to a malfunction in the vehicle's communication system

Definition

The OBD2 code U058B indicates a communication issue with a reserved ISO/SAE network, typically related to a malfunction in the vehicle's communication system

Common causes

  • Faulty communication between modules
  • Corrupted software or firmware in a module
  • Damaged wiring or connectors
  • Power supply issues to the module
  • Malfunctioning or incompatible aftermarket parts
  • Faulty or failing control modules

Common misdiagnoses

  • Faulty wiring or connectors
  • Malfunctioning control modules
  • Incorrectly programmed or updated software
  • Issues with the vehicle's communication network
  • Sensor failures
  • Power supply problems
  • Grounding issues

Troubleshooting steps

  1. 1. Check for Other Codes

    Use an OBD-II scanner to check for any additional trouble codes. Other codes may provide more context or indicate which module is having communication issues

  2. 2. Inspect Wiring and Connectors

    Visually inspect the wiring and connectors associated with the affected modules. Look for signs of damage, corrosion, or loose connections that could disrupt communication

  3. 3. Check Module Functionality

    Identify the specific module that is causing the issue. This may require consulting the vehicle's service manual. If possible, test the module to ensure it is functioning correctly

  4. 4. Perform a Network Scan

    Use a professional-grade scan tool to perform a network scan. This can help identify which modules are communicating properly and which are not

  5. 5. Check for Software Updates

    Sometimes, communication issues can be resolved with a software update. Check with the manufacturer for any available updates for the affected modules

  6. 6. Inspect the CAN Bus

    If the vehicle uses a CAN bus, check for proper voltage levels and signal integrity on the bus. You may need an oscilloscope to analyze the signals

  7. 7. Reset the Modules

    Disconnect the battery for a few minutes to reset the modules. Reconnect the battery and see if the code reappears

  8. 8. Check for Ground Issues

    Ensure that all ground connections are secure and free of corrosion. Poor grounding can lead to communication problems

  9. 9. Test with a Different Scanner

    If you suspect the scanner may not be reading correctly, try using a different OBD-II scanner to see if the same code appears

  10. 10. Consult Technical Service Bulletins (TSBs)

    Check for any TSBs related to the U058B code for your specific vehicle make and model. Manufacturers may have issued guidance on common issues and fixes. 1

  11. 11. Seek Professional Help

    If the issue persists after performing these steps, it may be necessary to consult a professional mechanic or dealership for further diagnosis and repair. By following these steps, you can systematically identify and address the underlying cause of the U058B code