AU
C006308

The yaw rate sensor (also known as the yaw angular velocity sensor) is the core inertial measurement unit of the ESP electronic stability system — Qin Plus

Braking System

The yaw rate sensor (also known as the yaw angular velocity sensor) is the core inertial measurement unit of the ESP electronic stability system.

It monitors the vehicle's rotational angular velocity around the vertical axis (Z-axis) in real time.

DTC C006308 indicates the ABS/ESP control unit detects the sensor's analog or digital output signal continuously exceeds the valid threshold range (typically 0-5V or an abnormal CAN signal), or experiences an abnormal update frequency or checksum error.

This fault prevents the ESP from accurately determining the deviation between the vehicle's actual attitude and the driver's steering intent, causing the system to exit the stability control function and trigger a multi-system degraded protection mode.

In extreme cases, the vehicle loses electronic assistance during emergency obstacle avoidance or sideslipping on wet or slippery roads, posing a severe safety hazard.

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Cases Logged
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Causes
Likely Causes — Qin Plus
  • 1Damaged yaw rate sensor chip integrated inside the ESP hydraulic modulator assembly, or cold solder joints (most common; many BYD models integrate the sensor into the ESP assembly, not as a separate external unit)
  • 2Poor contact or intermittent connection in the sensor power supply circuit (12V IGN) or ground wire (GND), causing operating voltage fluctuations or momentary power loss.
  • 3Sensor signal line (LIN/CAN or analog signal line) short to power or ground, open circuit, or connector water ingress and oxidation causing signal crosstalk.
  • 4A loose sensor mounting base or a degraded and detached rubber vibration damper shifts the measurement reference and causes the output signal to drift beyond the ECU fault tolerance range.
  • 5Physical damage to the sensor's internal MEMS micromechanical structure following an underbody impact, bottoming out, or severe jolting.
What To Do
  • 1
    Use the VDS2000/3000 diagnostic tool to read the complete fault codes and record the freeze frame data. Confirm if C006308 is a current fault and check for accompanying related codes such as C006302/C006382.
  • 2
    Check the relevant warning lights on the instrument panel. With the vehicle stationary, check the data stream to verify the yaw rate value is near 0°/s (within ±5°/s). Confirm the fault if the value remains fixed at 0 or 126, or is out of range.
  • 3
    Raise the vehicle. Inspect the exterior of the ESP assembly (located in the engine compartment or under the cabin center tunnel) and the wiring harness connector (usually a large 25-47 pin plug) for water ingress, corrosion, or recessed pins.
  • 4
    Disconnect the battery negative terminal. Measure the voltage and resistance at the yaw rate sensor power supply pins (usually IGN+ and GND) in the ESP assembly connector. Standard values: power supply 12V±0.5V, ground resistance <1Ω.
  • 5
    If the wiring is normal, attempt a sensor zero-point calibration (on supported models): with the vehicle stationary on a level surface, use the diagnostic tool to perform the "Yaw Rate Sensor Calibration" function.
  • 6
    If calibration fails or the fault persists, replace the ESP hydraulic modulator assembly with ECU (genuine BYD part). After replacement, perform bleeding, code matching, and sensor calibration.
  • 7
    Road test verification: Drive in an S-pattern at 20-40 km/h. Observe the data stream to verify the yaw rate value changes in real time with steering input. Confirm the ESP function is restored and the fault code does not recur.
Real-World Cases
BYD DTC AI Analysis

BYD Song Plus DM-i: ESP and multiple warning lights on after water wading

✓
2021 Song PLUS DM-i. Owner reported that after driving through floodwater in heavy rain, the ABS, ESP and Automatic Emergency Braking warning lights illuminated. VDS scan showed current fault C006308. Found the ESP assembly near the right front side member. Disconnected the wiring harness connector and found water inside, with green corrosion on Pin 12 (sensor power supply) and Pin 28 (signal ground). Cleaned and dried the connector; fault cleared temporarily but returned after 2 days. Replaced the ESP wiring harness connector and sealed it against water. Fault resolved completely.
BYD DTC AI Analysis

Intermittent yaw rate sensor signal drift on E5 taxi

✓
A 2019 E5 taxi with 180,000 km occasionally displayed the ESC warning light, particularly after driving over speed bumps or rough roads. Scan tool showed intermittent fault code C006308. Live data revealed the yaw rate value occasionally jumped to 15-30°/s while the vehicle was stationary. Inspection of the ESP assembly mounting bracket found one mounting bolt loose and the rubber damper aged and cracked. Retightened the bolt and replaced the damper, then performed a continuous 50 km road test; live data remained stable and the fault resolved.
BYD DTC AI Analysis

C006308 fault code recurs after accident repairs

✓
A 2018 E5 sustained frontal collision damage. Repairs replaced the front bumper, left front fender and ESP assembly (salvage part). After the work, the instrument cluster showed a steady ESC fault. DTC C006308 was stored. The replacement ESP assembly part number had a different suffix from the factory original (missing the -02 version). The technical bulletin confirms this model requires a specific ESP version; sensor parameters require online programming and matching via VDS. Installing the correct ESP version and completing the online configuration cleared the fault.
BYD DTC AI Analysis

Sensor failed to initialize after long-term parking

✓
A 2019 E5 displayed an ESP warning light on startup after sitting stationary for 3 months. The scan tool retrieved DTC C006308; live data showed the yaw rate signal fixed at 0°/s. Power and ground circuits tested normal. The sensor calibration procedure returned "Calibration failed, sensor not ready". Diagnosis: internal ESP assembly sensor failure (long-term power-down caused the MEMS mechanism to seize). Replaced the ESP hydraulic modulator assembly, performed the calibration successfully, and cleared the fault.
Other Qin Plus 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: Official This information is for reference only. Always consult a qualified technician for diagnosis and repair. Do not attempt high-voltage system repairs yourself.