BYD ATTO 3 (e-Platform 3.0) U0164 Loss Of Communication With Air Conditioning System

U0164 indicates that communication with the air-conditioning system has been lost. The fault affects the vehicle communication network used to exchange climate-control information between the A/C control system and other electronic control units responsible for cabin temperature management and related vehicle functions. The BYD ATTO 3 uses BYD’s e-Platform 3.0 architecture, with this generation introduced from 2022 and continuing onward.

Symptoms

• Air conditioner does not operate correctly
• Cabin cooling or heating may be unavailable
• Climate control display or functions may be intermittent
• A/C controls may not respond
• Climate control warning may be displayed
• Compressor operation may be disabled
• Multiple HVAC or communication fault codes may be stored
• U0164 stored in a relevant control module

Possible Causes

• Loss of communication with the A/C control system
• CAN communication wiring fault
• Open or short circuit in the communication network
• A/C control-module power supply fault
• A/C control-module ground fault
• Loose or damaged HVAC connector
• Poor or corroded connector terminals
• Low or unstable 12V auxiliary voltage
• Internal A/C control-module failure
• Fault in another control module disrupting CAN communication
• Software or configuration issue

Diagnosis

Diagnosis should begin by confirming U0164 and performing a complete vehicle network scan to identify related HVAC, power supply, and communication faults. The A/C control system’s power and ground circuits, CAN communication lines, connector condition, module availability, and network status should then be evaluated against manufacturer specifications.

The diagnostic direction should establish whether the loss of communication originates from the A/C control system, its wiring, power supply, or another module affecting the network before replacing the control module. For New Zealand owners, confirming the communication circuit before replacing HVAC electronics can help avoid unnecessary repair costs.

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.