What it means
This code identifies a fault associated with the second row center seat belt sensor. The restraint control module sets it when it detects a problem with this sensor; the specific fault is identified by accompanying subfault information.
At a glance
- Usually lights the airbag (SRS) or body-system warning light
How it works
The second-row center seat-belt sensor or buckle switch reports that position's belt status to the restraint control module. The module monitors the input and circuit for a fault; the accompanying subfault information distinguishes the specific failure.
Common causes
Most likely first.
- Faulty second-row center seat belt buckle switch or sensor
- Damaged wiring or loose connector at the buckle
- Connector corrosion or poor electrical contact
- Fault in the restraint control module
Symptoms
- Airbag or seat belt warning light on
- Seat belt status may be misreported
How to diagnose it
- Retrieve the B0054 subfault and freeze-frame data with a restraint-capable scan tool before clearing the code.
- Check that the second-row center belt is correctly routed and that its buckle latches and releases without sticking.
- Inspect the center buckle connector and wiring for loose fit, corrosion, damaged pins, or pinching when the second-row seat is moved or folded.
- Observe second-row center belt-status data while operating the buckle and confirm that the scan-tool state follows it.
- Test the center buckle sensor and circuit according to the manufacturer's procedure before diagnosing the restraint control module.
Common fixes
- Reconnect or repair wiring at the second-row center buckle.
- Repair corroded or damaged connector terminals.
- Replace the faulty second-row center buckle switch or sensor assembly.
- Repair or replace the restraint control module only after verifying the sensor circuit and module connections.
Can I keep driving?
The vehicle may be driveable, but the system may misread whether the second-row center belt is fastened and may not operate as intended in a crash. Use that position only if its belt latches securely, and have the restraint warning checked promptly.
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.