WOMS
U code network Medium severity

U2813 U2813: BECM Communication Error - Invalid Data Received

The OBD2 code U2813: BECM Communication Error - Invalid Data Received indicates a communication issue between the Body Electronic Control Module (BECM) and other vehicle modules, where the data received is not valid or...

Definition

The OBD2 code U2813: BECM Communication Error - Invalid Data Received indicates a communication issue between the Body Electronic Control Module (BECM) and other vehicle modules, where the data received is not valid or expected

Common causes

  • Faulty Body Control Module (BCM)
  • Damaged wiring or connectors
  • Corrupted software or firmware in the BCM
  • Poor ground connections
  • Interference from aftermarket accessories
  • Faulty sensors or components communicating with the BCM
  • Low battery voltage or power supply issues
  • Corroded or loose terminals

Common misdiagnoses

  • Faulty Body Control Module (BCM)
  • Wiring issues or shorts in the communication lines
  • Corrupted software or firmware in the BCM
  • Faulty sensors or actuators related to the BCM
  • Power supply issues to the BCM
  • Incorrectly configured or programmed BCM
  • Issues with the vehicle's diagnostic tools or scanners
  • Problems with other control modules affecting communication

Troubleshooting steps

  1. 1. Check for Additional Codes

    Use an OBD-II scanner to check for any other trouble codes that may be present. Addressing related codes can help in diagnosing the issue

  2. 2. Inspect Wiring and Connectors

    Visual Inspection: Check the wiring harness and connectors between the BCM and BECM for any signs of damage, corrosion, or loose connections

  3. 3. Repair or Replace

    Repair any damaged wires or connectors and ensure all connections are secure

  4. 4. Check for Short Circuits or Open Circuits

    Use a multimeter to test for continuity in the wiring between the BCM and BECM. Look for any short circuits or open circuits that could disrupt communication

  5. 5. Inspect the Modules

    BCM and BECM: Check both the Body Control Module and Battery Energy Control Module for any signs of physical damage or water intrusion

  6. 6. Reprogram or Replace

    If the modules are damaged or malfunctioning, they may need to be reprogrammed or replaced

  7. 7. Check Power and Ground

    Ensure that both the BCM and BECM are receiving proper power and ground. Use a multimeter to verify voltage levels at the connectors

  8. 8. Test Communication Lines

    Use a scan tool to monitor the communication lines (CAN bus) for proper signals. Look for any irregularities in the data being transmitted

  9. 9. Clear Codes and Test Drive

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

  10. 10. Check for Software Updates

    Check if there are any software updates available for the BCM or BECM. Sometimes, manufacturers release updates to fix known communication issues

  11. 11. Consult Technical Service Bulletins (TSBs)

    Look for any TSBs related to the U2813 code for your specific vehicle make and model. Manufacturers may have specific recommendations for addressing this issue

  12. 12. Seek Professional Help

    If the issue persists after performing the above steps, consider consulting a professional mechanic or dealership for further diagnosis. They may have specialized tools and knowledge to resolve complex communication issues. By following these troubleshooting steps, you should be able to identify and resolve the underlying cause of the U2813 code