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B1750-00

This DTC indicates the SRS (Supplemental Restraint System) ECU cannot establish valid communication with the right rear side airbag module and detects an open circuit in the airbag circuit (resistance exceeds the normal 2-3Ω range, typically reading as infinite or >10Ω) — Atto 3

Safety System

This DTC indicates the SRS (Supplemental Restraint System) ECU cannot establish valid communication with the right rear side airbag module and detects an open circuit in the airbag circuit (resistance exceeds the normal 2-3Ω range, typically reading as infinite or >10Ω).

This failure disables protection for the right rear occupant during a side impact and may trigger an SRS downgrade mode, affecting the coordinated deployment strategy of other airbags.

On certain vehicle configurations, incorrect vehicle coding (flashing high-spec software to a low-spec vehicle) can cause a false DTC.

4
Cases Logged
Real-World Cases
BYD DTC AI Analysis

Qin EV450 right rear seat adjustment caused connector to come loose

✓
2018 BYD Qin EV450. Owner reported the airbag warning light stayed on after large forward/backward movements of the right rear seat. Scanned with VDS2000 and retrieved DTC B1750-00. Removed the right rear seat side trim panel and found the airbag module connector (beneath the seat backrest) not fully latched, causing it to come loose from seat track movement. Reconnected firmly, verified the latch engaged, then secured the harness with cable ties so it wouldn’t move with the seat. Cleared the fault code – issue resolved.
Original source ↗
BYD DTC AI Analysis

Qin 100: Internal open circuit in right rear side airbag module

✓
2017 BYD Qin 100. After collision repair to the right rear door and replacement of the door panel, DTC B1750-00 appeared and could not be cleared. Inspected connectors: connections normal. Measured airbag module resistance: infinite (normal: 2–3 Ω), determined an internal open circuit in the module (likely caused by static electricity or improper handling during repair). Replaced the right rear seat side airbag module, performed SRS system configuration and coding matching with the diagnostic scanner. Fault resolved.
Original source ↗
BYD DTC AI Analysis

Qin EV300 seat rail wear chafed through wiring harness, causing intermittent fault

✓
2017 BYD Qin EV300. SRS warning light illuminates intermittently. DTC B1750-00 sets intermittently. Rough roads easily trigger the fault. Found that at certain seat positions, the right rear seat rail pressed against and chafed the wiring harness, damaging the airbag circuit wire insulation and causing a short to earth. Repaired the damaged harness (rewrapped and fitted protective sleeving), rerouted the harness away from the seat rail movement range, and fitted a rubber sleeve at the interference point. Fault fully resolved.
BYD DTC AI Analysis

Incorrect software configuration on Qin 80 base model triggers false alarm.

✓
A 2017 BYD Qin 80 Comfort trim (no rear side airbags from factory) set DTC B1750-00 right after an SRS software update at the dealership. A configuration check revealed that the right rear side airbag was not physically installed; however, the SRS ECU had been incorrectly flashed with the high-spec software. The technician reflashed the ECU with the base model configuration codes using the dedicated diagnostic tool (VIN rematching and parameter configuration). The code cleared and the system returned to normal.
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.