WOMS
U code network Medium severity

U055B Invalid Data Received From Special Purpose Vehicle Control Module "B

The OBD2 code U055B indicates that the vehicle's control module has received invalid or corrupted data from a special purpose vehicle control module identified as "B."

Definition

The OBD2 code U055B indicates that the vehicle's control module has received invalid or corrupted data from a special purpose vehicle control module identified as "B."

Common causes

  • Faulty Special Purpose Vehicle Control Module "B"
  • Corrupted or damaged software in the control module
  • Poor or damaged wiring or connectors
  • Communication issues between modules
  • Electrical interference or noise
  • Low battery voltage or power supply issues
  • Faulty sensors or inputs related to the control module
  • Grounding issues in the vehicle's electrical system

Common misdiagnoses

  • Faulty wiring or connectors
  • Malfunctioning body control module (BCM)
  • Defective powertrain control module (PCM)
  • Issues with the instrument cluster
  • Problems with the transmission control module (TCM)
  • Incorrectly programmed modules
  • Faulty sensors related to vehicle dynamics
  • Software glitches in the vehicle's control systems

Troubleshooting steps

  1. 1. Check for Additional Codes

    Use an OBD-II scanner to check for any other trouble codes that may be present. Sometimes, multiple codes can provide more context for the issue

  2. 2. Inspect Wiring and Connectors

    Visual Inspection: Check the wiring and connectors related to the control module in question. Look for signs of damage, corrosion, or loose connections

  3. 3. Connector Pins

    Ensure that the pins in the connectors are not bent or corroded

  4. 4. Verify Module Functionality

    Module Operation: If possible, verify that the special purpose vehicle control module 'B' is functioning correctly. This may involve checking its operation through a scan tool or diagnostic software

  5. 5. Power and Ground

    Ensure that the module is receiving proper power and ground. Use a multimeter to check voltage and ground continuity

  6. 6. Check for Software Updates

    Manufacturer Updates: Check if there are any software updates available for the vehicle’s control modules. Sometimes, manufacturers release updates to fix bugs or improve communication between modules

  7. 7. Clear Codes and Test Drive

    Clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive. Monitor for the return of the U055B code or any other related codes

  8. 8. Inspect Other Modules

    If the issue persists, check other related control modules for faults. Communication issues can sometimes stem from a problem in another module that is affecting the network

  9. 9. Network Communication Check

    CAN Bus: If the vehicle uses a Controller Area Network (CAN) bus, check for communication issues on the bus. Use a scan tool to monitor data flow and look for any irregularities

  10. 10. Termination Resistors

    Ensure that the CAN bus termination resistors are present and functioning correctly

  11. 11. Consult Technical Service Bulletins (TSBs)

    Look for any TSBs related to the U055B code or the specific vehicle model. Manufacturers may have documented common issues and solutions

  12. 12. Professional Diagnosis

    If the problem remains unresolved, consider seeking help from a professional mechanic or dealership. They may have access to advanced diagnostic tools and resources

  13. 13. Replace the Module (if necessary)

    If all other troubleshooting steps fail and the module is confirmed to be faulty, replacement of the special purpose vehicle control module 'B' may be necessary.Conclusion Always follow safety precautions when working on a vehicle's electrical system. If you're not comfortable performing these steps, it's advisable to consult with a professional technician