U2813 – BECM Communication Error – Invalid Data Received

The ODBII 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.

The severity of ODBII code U2813 is generally considered moderate.

Common Causes For: U2812 U2812: “Module Communication Failure”

• 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 misdiagnosis for U2813 U2813: BECM Communication Error – Invalid Data Received

• 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

Common Troubleshooting Steps

The OBD-II code U2813 indicates a communication error between the Body Control Module (BCM) and the Battery Energy Control Module (BECM). This error typically arises from issues in the communication network or problems with the modules themselves. Here are some common troubleshooting steps to diagnose and resolve the U2813 code:

• 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.
• 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.
• **Repair or Replace: Repair any damaged wires or connectors and ensure all connections are secure.
• 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.
• 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.
• **Reprogram or Replace: If the modules are damaged or malfunctioning, they may need to be reprogrammed or replaced.
• 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.
• 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.
• 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.
• 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.
• 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.
• 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.