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C050600

DTC C050600 indicates the IPB (Intelligent Integrated Braking System) detects an electrical circuit fault in the right front wheel speed sensor (WSS) — Atto 8

Braking System

DTC C050600 indicates the IPB (Intelligent Integrated Braking System) detects an electrical circuit fault in the right front wheel speed sensor (WSS).

This is a circuit integrity fault.

The ECU detects sensor signal voltage outside the normal threshold (typically 0.1V-4.9V), a short to power or ground, an open circuit, or signal interference.

The BYD IPB system uses a two-wire Hall effect or magnetoelectric wheel speed sensor.

The ECU continuously monitors the sensor supply current and signal waveform.

If the right front wheel speed signal is lost or distorted, the system disables functions relying on wheel speed data, including ABS, EBD, TCS, ESC, and AEB.

The vehicle retains basic hydraulic braking capability.

This fault illuminates multiple instrument cluster warning lights (ABS/ESC/AEB) and triggers Limp Home mode, which limits power output or disables energy recovery.

5
Cases Logged
Real-World Cases
BYD DTC AI Analysis

Song PLUS DMi Right Front Wheel Speed Sensor Harness Wear from Suspension Contact

✓
Mileage 28,000km. ABS warning light came on intermittently when driving on rough roads. VDS read history code C050600. Inspection found the right front wheel speed sensor harness interfering between the steering knuckle and lower control arm bracket. The outer insulation had worn through exposing the shielding, with 3 internal copper wires broken. Repaired the harness by soldering and sealing with waterproof heat-shrink tubing, repositioned the harness clips, and added corrugated tube protection. Fault resolved.
BYD DTC AI Analysis

Right front wheel speed sensor short circuit after driving through water

✓
After driving through standing water during heavy rain, the dashboard displayed a brake system fault. Diagnosis revealed active DTC C050600. The right front wheel speed sensor connector measured 0.8 Ω to ground (shorted). Removing the sensor revealed internal water ingress and a burnt-out Hall element. Replaced the sensor, dried the connector and applied dielectric grease. Fault resolved.
BYD DTC AI Analysis

Intermittent fault caused by IPB software false positive

✓
No driveability issues, but DTC C050600 set frequently and returned within 50 km after clearing. Checked wiring harness and sensor — both normal. Sensor signal waveform showed high-frequency noise. Per TSB, this batch of IPB control units with software V1.02 has a sampling circuit filtering algorithm defect. Fix: Updated IPB software to V1.05, performed control unit coding and longitudinal acceleration sensor calibration. Fault has not returned.
BYD DTC AI Analysis

Non-OEM tires causing false wheel speed signal discrepancy detection

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Owner fitted a non-OEM-spec tyre to the right front (diameter difference >3%). This caused the right front wheel speed to consistently differ from the other three wheels by more than 5 km/h. The IPB flagged the right front wheel speed sensor signal as implausible and stored DTC C050600. This was not a wiring harness fault, but the fault code definition covers signal plausibility checks. Fix: Replaced the tyre with an OEM-spec unit, performed tyre pressure matching and wheel speed synchronisation learning. System returned to normal.
BYD DTC AI Analysis

Right front wheel speed sensor connector pin backed out, poor contact

✓
After accident repairs (right front wing panel), the ABS light stayed on. Inspection found the right front wheel speed sensor connector had been disconnected and reconnected during the crash repair, but the female terminals on the IPB side were not fully inserted and locked. Driving vibrations caused an intermittent open circuit, with resistance fluctuating between 0.3–50Ω. Repair: Used a dedicated pin removal tool to resecure the terminals, ensuring the locking tabs engaged properly. Measured continuity resistance below 0.5Ω. Fault cleared.
Other Atto 8 Fault Codes
B1108For the BYD Song MAX (2017–2019), DTC B1108 indicates a short circuit in the PM2.5 air quality detection module (dust sensor) or its wiring harness. The sensor uses laser scattering to detect in-cabin and outside PM2.5 concentrations and transmits data to the HVAC ECU via the LIN bus or an analog signal. Short circuit conditions include: 1) Sensor power supply wire (+5V/+12V) shorted to ground 2) Signal wire shorted to power or ground 3) Short circuit in the sensor's internal photoelectric detection circuit This fault prevents the automatic climate control from switching between fresh air and recirculation based on air quality. The system enters fail-safe mode (typically forced recirculation). Severe short-circuit current can destroy the HVAC ECU sampling circuit. The system classifies this as a Level 3 severe fault and restricts vehicle operation to prevent electrical fires or controller damage. For other BYD models (such as the Qin EV, E5, and Song DM), B1108 indicates a driver-side sunload sensor fault, reflecting differences in DTC definitions across models.B110811This DTC indicates a short circuit in the air conditioning system PM2.5 air quality sensor (rapid detector). Specifically, abnormal continuity exists between the sensor power supply circuit or signal output circuit and body ground or battery positive. This causes the control module (ACU/air conditioning controller) to detect abnormal current or a voltage signal outside the valid range (typically 0V or supply voltage). The PM2.5 sensor monitors internal and external particulate concentrations, providing the data the automatic air conditioning system uses to switch between fresh air and recirculation modes. A short circuit disables the air quality monitoring function. This fault may force the air conditioning system into recirculation protection mode and trigger related thermal management system faults, as the air conditioning system acts as a key actuator in vehicle thermal management. In severe cases, the short circuit current can damage the internal sampling circuit of the air conditioning controller or overheat the wiring harness.B1109DTC B1109 indicates an open circuit in the communication line between the air conditioning system PM2.5 air quality sensor (dust concentration sensor) and the air conditioning control unit (AC ECU), or an open circuit within the sensor internal circuitry. Typically located in the air conditioning intake duct, this sensor monitors real-time PM2.5 particle concentration inside and outside the vehicle. It provides data to the automatic air conditioning system for intelligent switching between fresh air and recirculation modes and for controlling the air purification device. During an open circuit fault, the AC ECU cannot receive the air quality signal, triggering the system fail-safe mode. Symptoms typically include failure of the automatic recirculation function, abnormal air purification indicator light operation, or abnormal air quality data displayed on the air conditioning panel. Severe cases may compromise the cabin environment control strategy, but do not directly affect vehicle driving safety.B110913DTC B110913 indicates an open signal circuit for the PM2.5 rapid detector (in-cabin air quality sensor). This sensor typically mounts inside the air conditioning system intake duct. It monitors in-cabin PM2.5 concentration in real time and provides data to the automatic air conditioning system for intelligent control of the air purification function. The BYD diagnostic protocol uses sub-code '13' to specifically indicate an open signal circuit. Although this fault theoretically affects a comfort feature, BYD Qin series vehicles classify it as a Level 3 (severe) fault. This classification occurs because the air conditioning system interacts with the battery thermal management system (e.g., monitoring battery cooling intake air quality). The fault can disable the automatic air conditioning mode and prevent the air purification function from operating. In extreme cases, it affects the battery compartment intake air quality assessment, triggering the 'repair immediately' strategy.B110AThis DTC indicates interrupted CAN bus communication or abnormal data between the air conditioning control unit (ACU) and the PM2.5 air quality sensor. The PM2.5 sensor monitors particulate concentration inside and outside the vehicle and provides the basis for purification control in the automatic air conditioning system. The ACU triggers this fault if it fails to receive a valid CAN message from the sensor within the specified period (usually 100-500 ms), if message verification fails, or if the signal frame times out. Although this fault does not affect vehicle driving safety, it disables the automatic air purification function. The air conditioning system cannot automatically switch between recirculation and fresh air modes or activate the air purification mode based on air quality. A persistent fault may restrict the thermal management strategy.
Data confidence: Community This information is for reference only. Always consult a qualified technician for diagnosis and repair. Do not attempt high-voltage system repairs yourself.