What it means
The restraint control module monitors the deployment circuit for the third-row right side airbag. It sets this code when it detects an electrical fault in that circuit, such as an open, short, or resistance outside its expected range.
At a glance
- Usually lights the airbag (SRS) or body-system warning light
How it works
The restraint control module monitors the deployment circuit for the third-row right side airbag. B0048 signals a fault in that specific circuit, with the accompanying subfault information identifying the electrical condition detected.
Common causes
Most likely first.
- Open or high resistance in the side airbag inflator circuit
- Damaged wiring or connector at the airbag or seat
- Loose or corroded connector
- Fault in the restraint control module
Symptoms
- Warning light or symbol related to the affected system
- Comfort or safety function impaired
How to diagnose it
- Read the restraint control module with an SRS-capable scan tool and save B0048's subfault and event data before clearing anything.
- With the vehicle powered down as directed by the manufacturer, inspect the third-row right side-airbag wiring and connectors, including accessible seat-area harnesses, for damage, looseness, corrosion, or previous repairs.
- Use the manufacturer's wiring diagram and SRS-safe test method to check the deployment circuit for an open or short.
- Check connector terminal contact and circuit resistance using the specified procedure and specification; do not test directly across the inflator unless expressly instructed.
- If the wiring and connectors pass, follow the diagnostic procedure to distinguish a faulty third-row right side-airbag module from a restraint control module fault.
Common fixes
- Repair damaged wiring in the third-row right side-airbag deployment circuit.
- Reseat or repair a loose or corroded connector using the manufacturer's SRS repair procedure.
- Replace the third-row right side-airbag module if testing confirms an internal fault.
- Repair or replace the restraint control module if the circuit and airbag module pass and module diagnosis confirms the fault.
Can I keep driving?
The third-row right side airbag may not deploy in a crash, so arrange prompt SRS diagnosis and avoid using that seating position until repaired. Do not handle its wiring unless following the manufacturer's airbag safety procedure.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.