U2823 – BECM Communication Error – Invalid Data Received

The ODBII code U2823 indicates a communication error between the Body Electronic Control Module (BECM) and other modules, specifically due to invalid data being received.

The severity of ODBII code U2823 is moderate.

Common Causes For: U2822 U2822: “Control Module Communication Failure”

• Faulty BECM (Body Electronic Control Module)
• Damaged wiring or connectors
• Corrupted software or firmware in the BECM
• Poor ground connections
• Interference from other electronic components
• Faulty communication network (CAN bus issues)
• Low battery voltage or power supply issues
• Corroded terminals or connectors

Common misdiagnosis for U2823 U2823: BECM Communication Error – Invalid Data Received

• Faulty Body Control Module (BCM)
• Wiring issues or damaged connectors
• Faulty sensors related to the BECM
• Software or firmware issues in the BECM
• Power supply problems to the BECM
• Incorrectly programmed or incompatible modules
• Grounding issues in the vehicle’s electrical system

Common Troubleshooting Steps

The OBD-II code U2823 indicates a communication error between the Body Control Module (BCM) and the Battery Energy Control Module (BECM). This error typically suggests that the BECM is not receiving valid data from the BCM or that there is a communication issue between these modules. Here are some common troubleshooting steps to diagnose and resolve the U2823 code:

• Check for Additional Codes: Use an OBD-II scanner to check for any other diagnostic trouble codes (DTCs) 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 that all connections are secure.
• Check Power and Ground: **Power Supply: Verify that the BECM is receiving the correct voltage. Use a multimeter to check the power supply to the module.
• **Ground Connections: Ensure that the ground connections for both the BCM and BECM are clean and secure.
• Inspect Modules: **Module Functionality: If possible, test the BECM and BCM for proper functionality. This may involve using a scan tool to check for communication and operational status.
• **Software Updates: Check if there are any software updates available for the BCM or BECM that may address communication issues.
• Clear Codes and Test Drive: After performing any repairs or inspections, clear the DTCs using the OBD-II scanner and take the vehicle for a test drive to see if the code reappears.
• Check for Interference: **Other Systems: Sometimes, other systems in the vehicle can interfere with communication. Check for any aftermarket devices or modifications that may be affecting the BCM or BECM.
• Perform a Network Test: If the issue persists, perform a network test to check for communication between all modules on the vehicle’s CAN bus. This can help identify if the problem is isolated to the BCM or BECM or if it involves other modules.
• Consult Technical Service Bulletins (TSBs): Look for any TSBs related to the U2823 code or communication issues between the BCM and BECM for your specific vehicle make and model.
• Professional Diagnosis: If the issue cannot be resolved with the above steps, consider seeking help from a professional technician or dealership with experience in diagnosing communication issues in your vehicle. By following these steps, you should be able to identify and resolve the underlying issue causing the U2823 code.