• posted by Craig Murray

P1BC000 indicates an abnormal angle signal from the resolver in the front drive motor. The resolver provides the motor controller with the rotor’s angular position, which is essential for accurately controlling motor torque and phase timing. When the controller detects an implausible or incorrect resolver angle, it may limit motor output or disable electric-drive operation as a protective measure. BYD diagnostic references identify P1BC000 as a front drive motor resolver/rotary encoder angle abnormality fault.

• posted by Craig Murray

P1BC400 indicates that Phase C of the front drive motor is not being detected correctly. The fault is detected when the front drive motor controller identifies an abnormal or missing Phase C current or phase-drive condition, potentially causing torque limitation or protective shutdown of the electric drive system. The BYD ATTO 3 uses the e-Platform 3.0 architecture and a permanent-magnet synchronous front drive motor, with the controller monitoring the three-phase motor circuit during propulsion and regenerative operation.

• posted by Craig Murray

P1BC300 indicates that Phase B of the front drive motor is not being detected correctly. The fault is detected when the front drive motor controller identifies an abnormal or missing Phase B current or phase-drive condition, potentially causing torque limitation or protective shutdown of the electric drive system. The BYD ATTO 3 uses the e-Platform 3.0 architecture and a permanent-magnet synchronous front drive motor, with the controller monitoring the three-phase motor circuit during propulsion and regenerative operation. BYD diagnostic information specifically identifies P1BC300 as a missing Phase B fault in the front drive motor.

• posted by Craig Murray

P1BC200 indicates that Phase A of the front drive motor is not being detected correctly. The fault is detected when the front drive motor controller identifies an abnormal or missing Phase A current or phase-drive condition, potentially causing torque limitation or protective shutdown of the electric drive system. The BYD ATTO 3 uses the e-Platform 3.0 architecture and a permanent-magnet synchronous front drive motor, with the controller monitoring the three-phase motor circuit during propulsion and regenerative operation. BYD diagnostic information specifically identifies P1BC200 as a missing Phase A fault in the front drive motor.

• posted by Craig Murray

P1BC600 indicates a fault involving Current Hall Sensor C in the front drive motor controller. The fault is detected when the controller identifies an abnormal current-sensing signal from Hall Sensor C, potentially affecting accurate motor-current control and causing torque limitation or protective shutdown. The BYD ATTO 3 uses the e-Platform 3.0 architecture and Blade Battery system, with the front drive motor controller monitoring current feedback during propulsion and regenerative operation. BYD diagnostic information specifically identifies P1BC600 as a front drive motor controller Current Hall Sensor C fault.

• posted by Craig Murray

P1BC500 indicates a fault involving Current Hall Sensor B in the front drive motor controller. The fault is detected when the controller identifies an abnormal current-sensing signal from Hall Sensor B, potentially affecting accurate motor-current control and causing torque limitation or protective shutdown. The BYD ATTO 3 uses the e-Platform 3.0 architecture and Blade Battery system, with the front drive motor controller monitoring current feedback during propulsion and regenerative operation. BYD diagnostic information specifically identifies P1BC500 as a front drive motor controller Current Hall Sensor B fault.

• posted by Craig Murray

P1BC900 indicates a fault with Current Hall Sensor A in the front drive motor controller. The fault is detected when the controller identifies an abnormal current-sensing signal from Hall Sensor A, which can affect accurate motor-current control and trigger torque limitation or protective shutdown. The BYD ATTO 3 uses the e-Platform 3.0 architecture and Blade Battery system, with the front drive motor controller monitoring phase-current feedback during propulsion and regenerative operation. BYD diagnostic information specifically identifies P1BC900 as a front drive motor controller Current Hall Sensor A fault.

• posted by Craig Murray

P1BB100 indicates a fault involving the Intelligent Power Module (IPM) within the front drive motor controller. The fault is detected when the controller identifies an abnormal condition in the IPM power-switching stage used to control current supplied to the front drive motor, potentially causing torque limitation or protective shutdown. The BYD ATTO 3 uses the e-Platform 3.0 architecture and Blade Battery system, with the front motor controller continuously monitoring its power electronics during propulsion and regenerative operation. BYD diagnostic information specifically identifies P1BB100 as a front drive motor controller IPM fault.

• posted by Craig Murray

P1BB500 indicates that the high-voltage supply monitored by the front drive motor controller has fallen below the permitted operating range. The fault is detected when the controller identifies insufficient high-voltage input during electric-drive operation, potentially causing torque limitation or protective shutdown of the drive system. The BYD ATTO 3 uses the e-Platform 3.0 architecture and Blade Battery system, with the front drive motor controller continuously monitoring high-voltage supply conditions. BYD diagnostic information specifically identifies P1BB500 as a front drive motor controller high-voltage undervoltage fault.

• posted by Craig Murray

P1BB600 indicates that the high-voltage input monitored by the front drive motor controller has exceeded its permitted operating range. The fault is detected when the motor controller identifies excessive high-voltage supply during electric-drive operation, potentially causing torque limitation or protective shutdown of the drive system. The BYD ATTO 3 uses the e-Platform 3.0 architecture and Blade Battery system, with the front drive motor controller monitoring high-voltage supply conditions during propulsion and regenerative operation. BYD diagnostic information specifically identifies P1BB600 as a front drive motor controller high-voltage overvoltage fault.