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C006208

DTC C006208 indicates the Electronic Stability Program (ESP) control unit detects an abnormal signal from the Longitudinal Acceleration Sensor (LAS) — Atto 3

Braking System

DTC C006208 indicates the Electronic Stability Program (ESP) control unit detects an abnormal signal from the Longitudinal Acceleration Sensor (LAS).

This sensor, typically integrated within the IPB (Intelligent Integrated Braking System) or ESP hydraulic modulator assembly, monitors the vehicle's longitudinal acceleration (G value) in real time.

It provides a critical input signal for ESP vehicle stability control, TCS traction control, and brake force distribution.

Fault conditions include signal circuit open or short, sensor signal out of range (±1.5g), signal drift, sensor self-test failure, or lost calibration data.

When this fault occurs, the ESP system enters a degraded mode.

Automatic Emergency Braking (AEB), Traction Control (TCS), and Electronic Brakeforce Distribution (EBD) functions may be limited or disabled.

The ESP/ABS warning lights illuminate on the instrument cluster, severely compromising driving stability and braking safety.

5
Cases Logged
Real-World Cases
BYD DTC AI Analysis

Water ingress corroded the IPB connector, causing intermittent signal faults.

✓
A 2019 BYD E5 exhibited intermittent ESP warning light illumination while driving. Retrieved DTC C006208 (alternating between current and history). Inspection revealed the vehicle had been driven through water. The IPB wiring harness connector (32-pin) showed internal green corrosion. Pin 3 (longitudinal accelerometer signal line) measured 5.2Ω contact resistance (specification <0.5Ω). Cleaned the connector pins, sprayed electronic connector protectant, and reconnected. Fault cleared. Recommend thoroughly checking IPB connector sealing when inspecting water-damaged vehicles.
BYD DTC AI Analysis

Sensors not calibrated after accident repair, causing the DTC to stay on.

✓
An E5 sustained front-end collision damage. After repairs, the ESP warning light remained on, storing DTC C006208. Inspection revealed the IPB assembly had been replaced with a new unit, but the technician did not perform sensor calibration. We executed "Longitudinal Acceleration Sensor Calibration" and "Lateral Acceleration Sensor Calibration" using VDS (C006308 often accompanies this fault), cleared the codes after successful calibration, and road-tested 20 km with no recurrence. Sensor zero-point calibration is mandatory after chassis repairs or IPB replacement.
BYD DTC AI Analysis

IPB internal sensor damaged. Replace complete assembly.

✓
No accident history, yet DTC C006208 persisted and could not be cleared. During sensor calibration, the diagnostic scanner displayed 'longitudinal acceleration raw value: 2.8g' (normal should be approximately 0±0.1g), well outside the reasonable range. Power supply and ground to the IPB tested normal. Wiring harness continuity checked good. Diagnosed the IPB internal longitudinal acceleration sensor (MEMS chip) as faulty. Replaced the IPB assembly and performed calibration and bleed procedures. Fault fully resolved.
BYD DTC AI Analysis

Underbody scrape shifted IPB mounting, causing signal deviation

✓
Underbody scraped a step. Dashboard displayed "Check ESP System". Read DTC C006208. On the hoist, found the IPB mounting bracket deformed and the IPB body rotated approximately 3° relative to the vehicle's longitudinal axis. The longitudinal acceleration sensor is sensitive to mounting angle; this positional shift caused a zero-point error. Straightened the bracket, re-torqued the IPB mounting bolts to 20N·m, performed sensor calibration. Fault cleared.
BYD DTC AI Analysis

Software version bug caused false alarm; fixed with software update

✓
Certain 2018 E5 vehicles intermittently log C006208 on rough roads with no actual hardware fault present. IPB software version V1.02 contains a signal filtering algorithm defect. Upgraded IPB software to V1.05 via VDS (optimised longitudinal acceleration signal sampling filter logic), cleared fault codes, and monitored for one month with no recurrence. For intermittent C006208, check software version first.
Other Atto 3 Fault Codes
P0A0DBattery Energy Control Module Requested MIL IlluminationP0AA6Hybrid Battery Voltage System Isolation FaultP1A00Drive Motor "A" Performance — BYD proprietaryB1108For 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.
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.