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B16E011

This DTC indicates an abnormally low-resistance connection (short circuit) between the signal circuit of the left rear side impact sensor (SIS) in the Supplemental Restraint System (SRS) and the vehicle body ground (GND) — Atto 3

Safety System

This DTC indicates an abnormally low-resistance connection (short circuit) between the signal circuit of the left rear side impact sensor (SIS) in the Supplemental Restraint System (SRS) and the vehicle body ground (GND).

Under normal operating conditions, the impact sensor sends a specific voltage signal (typically a PWM or resistor divider signal) to the SRS control unit (ACU) to indicate its status.

When a short to ground occurs, the ACU detects the circuit voltage remaining at or near 0V and a resistance well below the standard range (typically <1Ω), identifying a short-to-ground fault.

This fault causes the SRS to enter fail-safe mode.

The system illuminates the airbag fault warning lamp and disables the left rear side airbag and curtain airbag deployment functions to prevent accidental deployment caused by the short circuit.

In a severe side-impact collision, the affected airbags may fail to deploy normally, posing a major safety hazard.

3
Cases Logged
Real-World Cases
BYD DTC AI Analysis

Water ingress into the left rear impact sensor connector caused a short to ground on the BYD Qin EV.

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After wading, the airbag warning light came on the instrument cluster. Retrieved DTC B16E011. Found the left rear impact sensor connector seal below the C-pillar had deteriorated, allowing water ingress that shorted the signal terminal to ground. Drained the connector, applied conductive anti-corrosion compound, and replaced the seal. Fault cleared.
Original source ↗
BYD DTC AI Analysis

Damaged wiring harness insulation after accident repair caused an intermittent short circuit in a BYD E2.

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The left rear of the vehicle previously sustained minor collision damage. After repairs at an independent workshop, DTC B16E011 appeared intermittently. Inspection found the wiring harness at the left rear chassis rail poorly secured and chafing against a metal bracket, wearing through the insulation and causing intermittent short-to-earth faults on bumpy roads. Rewrapping the harness and adjusting its mounting position permanently resolved the fault.
Original source ↗
BYD DTC AI Analysis

BYD E3 left rear collision sensor internal PCB short circuit fault

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No accident history. After driving in rain, the airbag warning light illuminated constantly with DTC B16E011. Inspected wiring harness — no damage. Measured resistance from sensor connector harness side to ground — normal. Determined internal electronic component seal failure in the sensor caused a short circuit. Replaced left rear impact sensor and performed system calibration. Fault cleared.
Original source ↗
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.