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U code network Medium severity

U0213 Lost Communication With Mirror Control Module

The OBD2 code U0213 indicates a loss of communication with the mirror control module, which may affect the functionality of the vehicle's side mirrors

Definition

The OBD2 code U0213 indicates a loss of communication with the mirror control module, which may affect the functionality of the vehicle's side mirrors

Common causes

  • Faulty mirror control module
  • Wiring issues (damaged, corroded, or loose connections)
  • Faulty connectors
  • Software issues or programming errors
  • Faulty body control module (BCM)
  • Power supply issues (blown fuses or insufficient voltage)
  • Intermittent communication faults
  • Grounding issues

Common misdiagnoses

  • Faulty mirror control switch
  • Wiring issues or shorts in the harness
  • Faulty body control module (BCM)
  • Defective power mirror motors
  • Issues with the vehicle's CAN bus system
  • Faulty door module
  • Low battery voltage or electrical system issues

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

    Visual Inspection: Check the wiring harness and connectors associated with the mirror 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 pushed back

  4. 4. Test the Mirror Control Module

    If accessible, test the mirror control module for proper operation. This may involve checking for power and ground at the module

  5. 5. Use a multimeter to measure voltage and ground at the module's connector

  6. 6. Check for Power and Ground

    Verify that the mirror control module is receiving the correct voltage and ground. Refer to the vehicle’s wiring diagram for the specific pin locations and expected voltages

  7. 7. Inspect the CAN Bus

    Since many modules communicate over the Controller Area Network (CAN) bus, check for issues with the CAN bus wiring. Look for shorts, opens, or damaged wires

  8. 8. Use a scan tool to monitor the CAN bus for communication issues

  9. 9. Perform a Module Reset

    Sometimes, resetting the module can resolve communication issues. This can be done by disconnecting the battery for a few minutes or using a scan tool to clear the codes

  10. 10. Check for Software Updates

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

  11. 11. Inspect Other Related Modules

    If the mirror control module is part of a larger system (like a body control module), check the other related modules for faults or communication issues

  12. 12. Test with a Known Good Module

    If possible, swap the mirror control module with a known good one to see if the problem persists. This can help determine if the module itself is faulty

  13. 13. Consult Technical Service Bulletins (TSBs)

    Look for any TSBs related to the specific make and model of the vehicle. Manufacturers may have documented common issues and fixes for this code.1

  14. 14. Professional Diagnosis

    If the issue persists after performing the above steps, consider seeking help from a professional mechanic or dealership. They may have specialized tools and knowledge to diagnose the problem more effectively. By following these steps, you should be able to identify the cause of the U0213 code and take appropriate action to resolve the communication issue with the mirror control module