B0042
Side Crash Sensor Communication Error - Right
2019-2024 BMW 3 Series G20 2.0L I4 Turbo B48
Critical SeverityBodyGeneric (SAE)
Description
Communication loss between the right side crash sensor and the airbag control module.
Symptoms
- Airbag warning light on
- SRS code stored
- Right side airbag protection degraded
Common Causes
- Damaged wiring in door or B-pillar
- Faulty sensor
- ACM bus fault
Diagnostic Steps
- Scan SRS codes
- Check passenger B-pillar connector
- Inspect door wiring
- Test sensor bus
Repair Notes
Repair wiring or replace right side crash sensor.
Related Codes
Other Body Codes
- B0001Driver Frontal Stage 1 Deployment Control
- B0002Driver Frontal Stage 2 Deployment Control
- B0003Passenger Frontal Stage 1 Deployment Control
- B0004Passenger Frontal Stage 2 Deployment Control
- B0005Driver Knee Airbag Deployment Circuit
- B0006Passenger Knee Airbag Deployment Circuit
- B0007Rear Left Side Airbag Deployment Circuit
- B0008Rear Right Side Airbag Deployment Circuit
- B0009Rear Center Airbag Deployment Circuit
- B0010Driver Side Airbag Deployment
B0042 on Other Vehicles
Common Questions
What does code B0042 mean on a 2019-2024 BMW 3 Series G20?
B0042 stands for "Side Crash Sensor Communication Error - Right". Communication loss between the right side crash sensor and the airbag control module.
What are the symptoms of B0042 on a BMW 3 Series G20?
Common symptoms of B0042 include: Airbag warning light on, SRS code stored, Right side airbag protection degraded.
What causes B0042 on a 2019-2024 BMW 3 Series G20?
Common causes of B0042 include: Damaged wiring in door or B-pillar, Faulty sensor, ACM bus fault.