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C006382

BYD's IPB (Integrated Brake Control System) defines DTC C006382 as a lateral acceleration sensor (G200) signal plausibility fault, rather than a simple yaw rate sensor fault — Qin Plus

Braking System

BYD's IPB (Integrated Brake Control System) defines DTC C006382 as a lateral acceleration sensor (G200) signal plausibility fault, rather than a simple yaw rate sensor fault.

This sensor typically mounts beneath the center console or behind the center armrest.

It continuously monitors lateral acceleration (in m/s² or G) during cornering or skidding, serving as a core input signal for the ESC (Electronic Stability Control) system to determine the vehicle's dynamic attitude.

The IPB control unit deems the signal unreliable and triggers this DTC if the sensor output falls outside the plausible range (does not approach 0 when stationary), exhibits excessive drift, or if the sensor mounting reference plane deviates from the vehicle horizontal plane by more than 3°.

Following this fault, active safety functions including ESC, ABS, and Automatic Emergency Braking (AEB) may degrade or fail completely.

In extreme cases, the vehicle may lose stability control on curves or slippery surfaces, posing a severe safety risk.

The C006382 fault code on the Qin Plus indicates a medium-severity lateral acceleration sensor signal plausibility fault in the Integrated Brake Control System. The sensor may be misaligned, loose, or tilted after console or repair work, or its connector may have water ingress or corrosion. ESC, ABS, and AEB performance may be reduced. Visit an authorised dealer to inspect mounting, wiring, and calibrate or replace the sensor. Typical repair cost data is available.
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Cases Logged
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Causes
Likely Causes — Qin Plus
  • 1Sensor mounting position offset or loose mechanical mounting: Failure to tighten screws to the standard torque (usually 8Nm) after accident repairs or removing the center console or armrest box causes the sensor body to tilt or prevents the arrow mark from pointing directly to the front of the vehicle.
  • 2Wiring harness connector water ingress and oxidation: After the vehicle drives through water (especially standing water exceeding 20cm), poor sealing of the sensor connector near the floor causes terminal oxidation, short circuits, or increased contact resistance.
  • 3Control unit calibration data lost: Replacing the low-voltage battery (auxiliary battery), disconnecting power for over 30 minutes, or updating the software clears the sensor zero-point calibration data stored in the IPB control unit, causing an incorrect signal reference.
  • 4Internal sensor damage: Internal MEMS chip aging from long-term use, or severe vehicle impact (such as bottoming out or driving at high speeds on rough roads) causing physical sensor damage (relatively uncommon).
  • 5Mounting bracket deformation: Prying the center console or floor frame during front-end collision repairs deforms the sensor mounting bracket, leaving the sensor mounting surface out of parallel with the vehicle horizontal reference plane.
What To Do
  • 1
    Initial visual inspection: Remove the center armrest box or the trim panel below the center console. Inspect the lateral acceleration sensor for physical damage, the mounting bracket for deformation, the connector for water marks or green oxidation, and the retaining screws for looseness.
  • 2
    Diagnostic tool data stream analysis: Use the BYD VDS2000 or Launch X431 to read the fault code freeze frame and check the 'lateral acceleration' value in the data stream. With the vehicle stationary on a level surface, the normal value should be approximately 0±0.2 m/s². If the reading shows a fixed offset (e.g., 0.8 m/s²) or fluctuates erratically, this confirms an abnormal sensor signal.
  • 3
    Electrical circuit inspection: Disconnect the sensor connector. Measure the supply pin voltage (should be 12V ± 0.5V), ground wire resistance (should be less than 1Ω), and voltage to ground for CAN-H (2.6V ± 0.2V) and CAN-L (2.4V ± 0.2V). Check the connector pins for oxidation. If necessary, clean with electrical contact cleaner and apply conductive grease.
  • 4
    Mechanical installation correction: Use a spirit level or dedicated calibration tool to check the sensor installation angle. Verify the sensor arrow mark points directly toward the front of the vehicle and the parallelism error between the mounting surface and the vehicle horizontal plane is less than 3°. Retighten the fixing screws to the specified torque (usually 8Nm).
  • 5
    Sensor zero-point calibration: Park the vehicle on level ground, center the steering wheel, and use the dedicated diagnostic tool to enter 'Chassis System' → 'Electronic Stability Program' → 'Special Functions'. Perform 'Lateral Acceleration Sensor Zero-Point Calibration' and 'ESC System Calibration' in sequence. Some models also require 'Longitudinal Acceleration Sensor Calibration' and 'Steering Angle Sensor Calibration'.
  • 6
    Function verification and road test: Clear the fault code, start the vehicle, and verify the instrument cluster ESC/ABS warning light turns off. Perform a road test including straight-line driving, lane changing, and cornering. Simultaneously monitor the data stream to confirm the lateral acceleration value changes logically and in real time with steering input, without abnormal spikes.
Real-World Cases
BYD DTC AI Analysis

Loose sensor mounting screw caused signal offset on Qin Pro DM

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Symptoms: Dashboard displayed "Check ESP System" and "Check ABS System". ESP warning light stayed on. ESP intermittently intervened abnormally during cornering (sudden single-wheel braking). Diagnosis: Fault code C006382. Live data showed lateral acceleration sensor reading 0.8 m/s² at standstill (normally near 0), with no change during steering. Found loose mounting screws at the rear of the centre console; sensor body tilted ~5°. Resolution: Tightened screws to 8 Nm, performed sensor zero calibration and ESC system calibration. Fault cleared.
BYD DTC AI Analysis

Song MAX connector oxidized after water ingress during wading

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Symptoms: Vehicle waded through ~20 cm of water. On startup, ESP light stayed on, steering was heavy (EPS entered protection mode), and speed was restricted. Diagnosis: Fault codes C006382 and C003708 present. Removed centre console and inspected sensor connector; found water inside with pins 1 and 4 oxidised green. Signal line-to-ground resistance measured abnormal. Resolution: Cleaned connector pins with electronic cleaner, blow-dried them, and applied waterproof conductive grease. Reconnected plug and performed sensor calibration. Recommended installing a waterproof cover.
BYD DTC AI Analysis

Tang DM installation angle error after accident repair

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Symptoms: After front impact repairs (front bumper and radiator support replaced), the ESP warning light remained on. Previous repairs did not involve the chassis. Diagnosis: Read DTC C006382. Found centre console removal during the accident repair had pried the sensor mounting bracket, leaving the sensor mounting surface at approximately 5° from the vehicle horizontal plane (standard requires <3°). Data stream showed lateral acceleration values fluctuating between +0.5G and -0.3G at standstill. Resolution: Corrected the sensor mounting bracket, ensured the arrow marking pointed directly forward and the sensor was level, then calibrated the lateral acceleration and steering angle sensors.
BYD DTC AI Analysis

Calibration data lost after 12V battery replacement on BYD Han EV

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Symptom: After the dealership replaced the auxiliary battery and upgraded the infotainment system, the instrument cluster displayed "Electronic Stability System Fault" with DTC C006382 at startup. Diagnosis: Only DTC C006382 present; no hardware fault codes. Sensor power and ground checked normal. Live data showed "invalid data". The battery replacement involved an extended power disconnect (over 30 minutes), causing ESP control unit calibration data loss. Resolution: No parts required. Parked the vehicle on level ground with the steering wheel straight. Used the BYD VDS diagnostic tool to perform "lateral acceleration sensor zero-point calibration" and "longitudinal acceleration sensor calibration". Cycled the ignition after calibration completed; the warning light cleared.
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.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.B110BDTC B110B indicates a fault in the internal air pump (sampling pump) of the PM2.5 air quality detector. This pump draws cabin or outside air into the PM2.5 sensor detection chamber, enabling the laser scattering sensor to measure real-time particulate matter concentration. The air conditioning controller (or BCM) sets this DTC upon detecting an open or short circuit in the pump drive circuit, or abnormal current caused by a seized pump motor. This fault disables the "Green Clean" system, causes the instrument cluster air quality display to read abnormally or disappear, and disables the automatic fresh air/recirculation switching function. It does not affect the vehicle powertrain or core thermal management functions.B173A1ADTC B173A1A indicates the right middle-row side airbag (typically located on the side of the right second-row seat or inside the C-pillar trim panel) igniter circuit resistance measures 0 Ω. In the Supplemental Restraint System (SRS), normal airbag igniter resistance ranges between 2.0 and 5.0 Ω. A resistance of 0 Ω indicates a short to ground or a short between circuit wires, preventing the Airbag Control Unit (ACU) from establishing a normal monitoring circuit. This safety-critical fault prevents the airbag from deploying during a collision, continuously illuminates the instrument panel SRS warning lamp, and may force the entire airbag system into fail-safe mode.B173BDTC B173B indicates an abnormal electric A/C compressor speed feedback signal or a communication fault between the compressor controller and the motor. In BYD new energy models (e.g., Tang, Song, Qin, and Yuan series), this DTC belongs to the HVAC subsystem within the Body Control system and specifically involves the electric compressor closed-loop control circuit. The ECU sets this DTC when the compressor controller (IPM) fails to receive a valid pulse signal from the Hall speed sensor for more than 3 continuous seconds, or when the deviation between the detected actual speed and the target commanded speed exceeds the calibrated threshold (typically >500 rpm). This fault forces the A/C system into fail-safe mode and stops compressor operation. Symptoms include a complete lack of cooling, intermittent cooling, or a sharp decrease in cooling performance. The instrument cluster A/C warning lamp may also illuminate. Prolonged operation with this fault can degrade high-voltage system insulation or cause controller overcurrent damage.
Common problems reported for Qin Plus →Qin Plus overview →
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.