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B16F0-00

B16F0-00 indicates a short to body ground in the Supplemental Restraint System (SRS) Right Rear Impact Sensor signal circuit — Atto 3

Safety System

B16F0-00 indicates a short to body ground in the Supplemental Restraint System (SRS) Right Rear Impact Sensor signal circuit.

This sensor typically mounts in the C-pillar or right rear quarter panel area to monitor collision acceleration at the right rear of the vehicle.

The SRS ECU logs this fault code when it detects abnormal voltage to ground on the sensor signal wire (continuous low level or excessively low impedance).

This fault prevents the SRS ECU from accurately receiving the right rear impact signal.

It may cause the airbag system to fail to deploy correctly during a side or rear impact, or to deploy inadvertently under normal conditions.

Consequently, the system enters fail-safe mode, illuminates the airbag warning light, and may disable certain airbag functions.

3
Cases Logged
Real-World Cases
BYD DTC AI Analysis

BYD Qin - Water ingress in right rear impact sensor connector caused short to ground

✓
The SRS warning light on a 2017 BYD Qin EV300 turned on suddenly after driving in wet weather. The scan tool retrieved DTC B16F0-00. Inspection beneath the right C-pillar revealed water inside the sensor connector, with the terminals showing oxidation and corrosion. The root cause was a deteriorated rear windscreen seal that allowed rainwater to track down the C-pillar and enter the connector, shorting the signal terminal to ground. Repair: cleaned the connector terminals, dried with compressed air, applied waterproof conductive grease, replaced the rear windscreen seal, and re-routed the wiring harness to prevent water pooling. Cleared the fault codes and road tested—fault resolved.
Original source ↗
BYD DTC AI Analysis

BYD Qin - Retrofitted reversing camera caused wiring harness chafing and a short to ground.

✓
A 2018 BYD Qin EV450 presented with the SRS warning light constantly illuminated one week after a reversing camera installation at a third-party accessory shop. Diagnostic scan revealed DTC B16F0-00. Investigation showed the installer had routed the rear camera harness through the same C-pillar grommet used by the right rear impact sensor wiring, and a fixing screw pressed directly on the sensor harness. This damaged the insulation, exposing copper conductors and causing a short to earth against the bodywork. Repaired the damaged harness by wrapping with insulation tape and fitting corrugated tubing, rerouted the camera harness to avoid interference with the factory harness, and replaced the fixing screw with a dedicated wiring clip. Cleared the fault code and confirmed the system returned to normal operation.
Original source ↗
BYD DTC AI Analysis

BYD Qin – Internal fault in right rear impact sensor causing short circuit

✓
A 2017 Qin 100 with no accident history had an SRS warning lamp that illuminated intermittently. The diagnostic scanner showed DTC B16F0-00. Initial inspection found the wiring harness visually undamaged and connectors in good condition. Swapped the right and left rear impact sensors for a substitution test. After clearing DTCs and road testing, the fault code changed to B1677-00 (left rear impact sensor short to ground), confirming the fault moved with the sensor. Disassembling the faulty sensor revealed the internal piezoelectric element seal had failed, causing a short circuit. Replaced the right rear impact sensor (part number per vehicle configuration), installed with the arrow pointing forward (crash sensing direction), and tightened to the specified torque (9-11 N·m). Replacing the sensor resolved the fault completely.
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.