BYD ATTO 3 (e-Platform 3.0) U0146 Communication Between Instrument And Gateway Interrupted

U0146 indicates that communication between the instrument cluster and vehicle gateway has been interrupted. The fault affects the vehicle communication network, where the gateway routes information between electronic control units and the instrument cluster displays vehicle status, warnings, and operating information. The BYD ATTO 3 uses BYD’s e-Platform 3.0 architecture, with this generation introduced from 2022 and continuing onward.

Symptoms

• Instrument cluster communication warning
• Missing or incorrect vehicle information
• Warning messages or indicators may be unavailable
• Cluster functions may operate intermittently
• Vehicle status information may not update correctly
• Multiple communication-related fault codes may be stored
• Instrument cluster may restart or temporarily lose information
• U0146 stored in the relevant control module

Possible Causes

• CAN communication wiring fault
• Open or short circuit in the communication network
• Loose or damaged instrument cluster connector
• Loose or damaged gateway connector
• Poor connector terminal contact
• Corrosion or damaged wiring
• Instrument cluster power or ground fault
• Gateway power or ground fault
• Internal instrument cluster failure
• Internal gateway fault
• Low or unstable 12V auxiliary battery voltage
• Another control module disrupting network communication

Diagnosis

Diagnosis should begin by confirming U0146 and carrying out a complete vehicle network scan for additional communication, power supply, or gateway-related faults. Instrument cluster and gateway power and ground circuits, CAN communication lines, connector condition, network status, and module availability should then be assessed against manufacturer specifications.

The diagnostic direction should determine whether the interruption originates from the cluster, gateway, wiring, power supply, or another module affecting the communication network before either module is replaced. Many independent workshops throughout New Zealand rely on OEM diagnostic information to verify communication faults before replacing control modules.

Accurately diagnosing this fault often requires manufacturer testing procedures, wiring diagrams, connector pinouts, specifications, and system calibration information. Access to the factory service manual significantly reduces diagnostic time and helps prevent unnecessary parts replacement.

Applicable Years

2022, 2023, 2024, 2025, 2026, Onwards

To order the correct OEM Service and Repair Manual for your BYD ATTO 3, submit your request using the form below and our team will provide the ordering details.