What it means
This code identifies a fault associated with the second row right 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 right seat-belt sensor or buckle switch sends that seating position's belt status to the restraint control module. The module monitors the input and wiring for a fault; the accompanying subfault information identifies the specific detected condition.
Common causes
Most likely first.
- Faulty second-row right 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
- Read the B0055 subfault and freeze-frame data with a scan tool that can access the restraint control module.
- Check that the second-row right belt latches and releases normally and that the buckle is not obstructed.
- Inspect the right second-row buckle connector and wiring for corrosion, looseness, damaged pins, or pinching from seat movement.
- Watch the second-row right belt-status data while latching and releasing the buckle to see whether the reported state changes correctly.
- Test the right buckle sensor circuit using the manufacturer's procedure before considering a restraint control module fault.
Common fixes
- Reconnect or repair damaged wiring at the second-row right buckle.
- Repair loose, corroded, or damaged connector terminals.
- Replace the faulty second-row right buckle switch or seat-belt sensor assembly.
- Repair or replace the restraint control module only after confirming the sensor circuit and connections are sound.
Can I keep driving?
The vehicle may be driveable, but it may misreport the second-row right belt status and the restraint system may not function as intended in a crash. Confirm the belt latches securely and arrange prompt diagnosis.
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.