BYD ATTO 3 (e-Platform 3.0) C050000 Left Front Wheel Speed Sensor Open Circuit

C050000 indicates an open circuit involving the left front wheel speed sensor circuit. The fault affects the ABS and wheel-speed monitoring system, which uses sensor signals to determine individual wheel rotation and support functions such as ABS, traction control, and vehicle stability control. The BYD ATTO 3 uses BYD’s e-Platform 3.0 architecture, with this generation introduced from 2022 and continuing onward.

Symptoms

• ABS warning light illuminated
• Traction control or stability control warning
• Wheel-speed-related fault stored in the vehicle
• ABS or stability control functions may be unavailable
• Vehicle speed information may become inaccurate in some operating conditions
• Regenerative braking behaviour may be affected
• Warning messages displayed on the instrument cluster
• Fault may occur intermittently or remain continuously active

Possible Causes

• Open circuit in the left front wheel speed sensor wiring
• Damaged or failed wheel speed sensor
• Loose, damaged, or corroded electrical connector
• Broken wiring near the wheel hub or suspension
• Poor connector terminal contact
• Damaged sensor mounting or wiring
• Water or contamination entering the connector
• Fault in the ABS/ESC control system
• Incorrect sensor installation following previous suspension or brake work

Diagnosis

Diagnosis should begin by confirming C050000 with a suitable diagnostic system and checking live wheel-speed data for an absent or implausible left front signal. The sensor circuit, connector, wiring continuity, power or signal supply, and related ABS/ESC inputs should then be evaluated against manufacturer specifications. Inspection of the sensor and wiring around the wheel hub is particularly important because this area is exposed to movement, moisture, road debris, and physical damage. Accurate diagnosis is especially important when parts availability and repair costs are considerations for New Zealand vehicle owners.

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.