B2403
Blind Spot Monitor Calibration Required
2016-2021 Mazda CX-3 2.0L I4
Moderate SeverityBodyGeneric (SAE)
Description
The blind spot monitoring system requires recalibration after sensor replacement or rear body repair.
Symptoms
- BSM system not functioning after repair
- Sensors not detecting vehicles
- False alerts or missed detections
- Calibration warning message
Common Causes
- Sensor replaced without calibration
- Rear bumper repair altered sensor alignment
- Rear collision shifted sensor mounting
- Sensor firmware update needed
Diagnostic Steps
- Verify sensor mounting alignment
- Perform BSM sensor calibration
- Check for rear body damage affecting sensor angle
- Use manufacturer calibration procedure
- Test system with dynamic road test
Repair Notes
Perform blind spot monitor calibration per manufacturer procedure.
Related Codes
Other Body Codes
- B0001Driver Frontal Stage 1 Deployment Control
- B0001Driver Frontal Stage 1 Deployment Control
- B0002Driver Frontal Stage 2 Deployment Control
- B0002Driver Frontal Stage 2 Deployment Control
- B0003Passenger Frontal Stage 1 Deployment Control
- B0003Passenger Frontal Stage 1 Deployment Control
- B0004Passenger Frontal Stage 2 Deployment Control
- B0004Passenger Frontal Stage 2 Deployment Control
- B0005Driver Knee Airbag Deployment Circuit
- B0005Driver Knee Airbag Deployment Circuit
B2403 on Other Vehicles
Common Questions
What does code B2403 mean on a 2016-2021 Mazda CX-3?
B2403 stands for "Blind Spot Monitor Calibration Required". The blind spot monitoring system requires recalibration after sensor replacement or rear body repair.
What are the symptoms of B2403 on a Mazda CX-3?
Common symptoms of B2403 include: BSM system not functioning after repair, Sensors not detecting vehicles, False alerts or missed detections, Calibration warning message.
What causes B2403 on a 2016-2021 Mazda CX-3?
Common causes of B2403 include: Sensor replaced without calibration, Rear bumper repair altered sensor alignment, Rear collision shifted sensor mounting, Sensor firmware update needed.