BYD ATTO 3 (e-Platform 3.0) B1AC800 Failed To Retrieve GPS Data

B1AC800 indicates that the vehicle has failed to retrieve valid GPS data. The fault affects the navigation and vehicle positioning system, which relies on GPS signals and communication between the positioning antenna, navigation or infotainment system, and associated control modules to determine the vehicle’s location. The BYD ATTO 3 uses BYD’s e-Platform 3.0 architecture, with this generation introduced from 2022 and continuing onward.

Symptoms

• Navigation system unable to determine the vehicle’s position
• Incorrect or missing vehicle location on the navigation map
• GPS signal unavailable or intermittent
• Navigation positioning may lag or become inaccurate
• GPS-related warning or message may be displayed
• B1AC800 stored in the relevant control system
• Navigation functions may be temporarily unavailable
• Positioning may return after restarting the infotainment system

Possible Causes

• Weak or unavailable GPS satellite signal
• Faulty GPS antenna
• Open or short circuit in the GPS antenna wiring
• Loose or damaged antenna connector
• Poor terminal contact or corrosion
• GPS antenna obstruction or installation issue
• Navigation or infotainment system fault
• Communication fault between the positioning system and control module
• Low or unstable 12V system voltage
• Software or configuration fault
• Internal failure of the navigation or positioning module

Diagnosis

Diagnosis should begin by confirming B1AC800 and determining whether the GPS signal is completely unavailable or only intermittently lost. GPS signal status, satellite reception, antenna condition, wiring and connectors, module power supply, communication status, and relevant navigation-system data should then be evaluated against manufacturer specifications. Testing should distinguish between poor satellite reception and a vehicle-side antenna, wiring, communication, or control-module fault before components are replaced. For New Zealand owners, confirming the GPS signal path before replacing the antenna or infotainment module 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.