What does the B003B fault code mean?
The B003B fault code, applicable to all car manufacturers, means “Second Row Right Frontal Stage 3 Deployment Control (Subfault)“.
Background Information: Newer vehicles use multi-stage airbags to regulate the pressure within the airbag. The higher the pressure, the greater the force of the airbag deployment. The system automatically determines the deployment strength based on parameters such as collision intensity, passenger weight, seat belt usage, child seat presence, and distance from the airbag. This design ensures that the airbag deploys with moderate force in most collisions, reserving maximum force for the most severe collisions.
Possible Symptoms of B003B:
- Airbag warning light illuminated
- Airbag deployment failure
- Possible problem with the seat occupancy sensor
Possible Causes of B003B:
- Faulty second-row right front airbag
- Open or short circuit in the second-row right front airbag circuit
- Poor connection in the second-row right front airbag circuit
- Faulty Sensor and Diagnostic Module (SDM)
Common Diagnosis and Repair for B003B:
Diagnostic Steps:
- Scan the system: Use an OBD2 SRS scanner to confirm the presence of the B003B code and check for other related codes.
- Check for faulty wiring: Inspect the wiring harness, connectors, and sensors related to the right second-row airbag.
- Inspect the airbag and sensor: Visually inspect the second-row airbag and sensor for any damage or wear.
- Test the airbag control module: Functional testing of the airbag control module may be necessary, as it may be responsible for detecting deployment stage errors.
- Perform system calibration: If components have been replaced or the system has been reset, the airbag system may need to be recalibrated.
Repair:
Professional Diagnosis: It is crucial to have airbag-related problems diagnosed and repaired by a certified mechanic or technician, as these systems are critical for safety.
Clear the code: After the problem is resolved, use an OBD2 scanner tool to clear the code and see if the problem persists.