Network Communication - U0039
This is a network communication code indicating a problem with vehicle-to-module communication. These codes became more common with modern vehicle electronics and CAN bus systems.
⚠️ Network codes (UXXXX): Typically indicate communication failures between vehicle modules. These can be harder to diagnose and may require dealer-level diagnostics or advanced scanners.
This is a reference only. Network communication issues often require professional diagnosis. Have a technician scan your vehicle with factory or advanced diagnostic equipment.