What does the B0038 fault code mean?
The B0038 fault code, applicable to all car manufacturers, means “Second Row Right Side Airbag Deployment Control (Subfault)“.
Background Information: Side airbags are mainly divided into two categories: side torso airbags and side curtain airbags. Side torso airbags deploy from the seat or door panel to protect the occupant’s torso. Head protection is provided by an extension of the side torso airbag or by a head curtain airbag.
B0038 Fault Symptoms
- Airbag warning light illuminates
- Dashboard displays SRS fault message
- Airbag may not deploy during a collision
Common Causes of B0038 Fault
- Faulty auxiliary switch
- Damaged wiring harness
- Corroded connector
- Battery voltage short circuit
- Open circuit
- Faulty Airbag Control Module (ACM)
How to Diagnose: Visual inspection of wiring and connectors, multimeter testing of switches and wiring, OBD2 scanner diagnosis, Airbag Control Module (ACM) diagnosis
Tools Required: Multimeter, scan tool (OBD airbag scanner), wiring diagram, basic hand tools
Possible Solutions: Solutions depend on the specific cause. Replacing a faulty auxiliary switch is a common solution. Repairing or replacing damaged wiring harnesses, cleaning or replacing corroded connectors, repairing short circuits or open circuits, or replacing a defective ACM are also possible solutions. After repair, clear the DTC, verify SRS function, and perform a system self-test.
B0038 Frequently Asked Questions
What does the B0038 code mean?
It means there is an electrical problem (open circuit or battery short circuit) in the auxiliary switch circuit of your car’s airbag system.
Can I drive with the airbag light on?
It is not recommended. The airbag may not deploy correctly in an accident, increasing the risk of injury.
How do I fix the B0038 fault code?
Diagnosis is key. This involves checking the wiring, connectors, and the auxiliary switch itself, usually requiring a multimeter and a scan tool.
Is the B0038 code serious?
Yes. It indicates a problem with the airbag system, which could compromise safety in a collision.
Can a blown fuse cause a B0038 fault code?
Yes, a blown fuse in the SRS circuit can trigger this fault code. Check your fuse box first.
Conclusion: The B0038 code indicates a potentially serious problem with the SRS system, requiring thorough diagnosis and repair. Due to the safety-critical nature of the SRS system, professional diagnosis and repair are strongly recommended to ensure proper system function and passenger safety.