BYD ATTO 3 (e-Platform 3.0) B1B4800 Rear Right Parking Sensor Internal Fault

B1B4800 indicates an internal fault has been detected in the rear right parking sensor. The fault affects the parking assistance system, which uses ultrasonic sensors to detect nearby obstacles and provide distance information to the parking control system. The BYD ATTO 3 uses BYD’s e-Platform 3.0 architecture, with this generation introduced from 2022 and continuing onward.

Symptoms

• Parking sensor warning displayed
• Rear parking assistance may be unavailable
• Rear right sensor may not detect nearby obstacles
• Incorrect or missing distance warnings
• Parking sensor alerts may be intermittent
• Multiple parking assistance functions may be restricted
• B1B4800 stored in the parking assistance system
• Parking sensor system may be disabled

Possible Causes

• Internal failure of the rear right parking sensor
• Damaged ultrasonic sensor
• Water or moisture intrusion into the sensor
• Damaged sensor connector
• Loose or poorly seated connector terminals
• Corrosion affecting the sensor circuit
• Open or short circuit in the sensor wiring
• Physical damage to the rear bumper or sensor
• Incorrect sensor installation or positioning
• Parking control-module fault
• Low or unstable 12V system voltage

Diagnosis

Diagnosis should begin by confirming B1B4800 and checking whether the fault remains associated with the rear right sensor during a system scan. The sensor’s electrical supply, wiring, connector condition, sensor response, mounting position, and parking control-module data should then be assessed against manufacturer specifications. The sensor surface and bumper mounting area should also be inspected for contamination, impact damage, or incorrect positioning before determining whether the sensor itself has failed. Vehicles used for regular commuting, long-distance touring, or towing duties in New Zealand may be more susceptible to symptoms associated with this fault.

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.