WOMS
U code network High severity

U0133 Lost Communication With Active Roll Control Module

The OBD2 code U0133 indicates that there is a loss of communication between the vehicle's control module and the Active Roll Control Module, which may affect the vehicle's stability and handling systems

Definition

The OBD2 code U0133 indicates that there is a loss of communication between the vehicle's control module and the Active Roll Control Module, which may affect the vehicle's stability and handling systems

Common causes

  • Faulty Active Roll Control Module
  • Damaged wiring or connectors
  • Corroded connectors
  • Poor ground connection
  • Faulty communication network (CAN bus issues)
  • Blown fuse
  • Software issues or module programming errors
  • Battery voltage issues

Common misdiagnoses

  • Faulty ABS module
  • Defective wheel speed sensors
  • Bad wiring or connectors
  • Malfunctioning power steering module
  • Issues with the body control module (BCM)
  • Battery or charging system problems
  • Faulty engine control module (ECM)

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 related issues

  2. 2. Inspect the Wiring and Connectors

    Visual Inspection: Check the wiring harness and connectors associated with the Active Roll Control Module for any signs of damage, corrosion, or loose connections

  3. 3. Connector Pins

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

  4. 4. Check Power and Ground

    Power Supply: Verify that the Active Roll Control Module is receiving the correct voltage. Use a multimeter to check the power supply at the module

  5. 5. Ground Connection

    Ensure that the ground connection for the module is secure and functioning properly

  6. 6. Inspect the Active Roll Control Module

    If the wiring and connections are intact, the module itself may be faulty. Consider testing or replacing the Active Roll Control Module if necessary

  7. 7. Check for Communication Issues

    CAN Bus Communication: The Active Roll Control Module communicates over the CAN bus. Use a scan tool to check if other modules are communicating properly. If other modules are also showing communication issues, there may be a problem with the CAN bus itself

  8. 8. Network Integrity

    Inspect the CAN bus wiring for shorts, opens, or other issues

  9. 9. Perform a Module Reset

    Sometimes, resetting the module can resolve communication issues. Disconnect the battery for a few minutes or use a scan tool to clear the codes and reset the module

  10. 10. Check for Software Updates

    Verify if there are any software updates available for the vehicle’s control modules. Sometimes, manufacturers release updates to fix communication issues

  11. 11. Consult Technical Service Bulletins (TSBs)

    Look for any TSBs related to the Active Roll Control Module or communication issues for your specific vehicle make and model. Manufacturers may have identified common problems and solutions

  12. 12. Professional Diagnosis

    If the issue persists after performing the above steps, it may be necessary to consult a professional mechanic or dealership for further diagnosis. They may have specialized tools and knowledge to address complex issues.Conclusion By following these troubleshooting steps, you can systematically identify and resolve the issue related to the U0133 code. Always ensure safety precautions are taken when working on a vehicle, and consult a professional if you are unsure about any steps