What it means
This code identifies a fault associated with the first 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.
How it works
The first-row center seat-belt sensor reports whether that seating position's belt is fastened to the restraint control module. The module monitors its signal and wiring for a fault; the exact electrical or status failure is described by the accompanying subfault information.
Common causes
Most likely first.
- Damaged seat belt sensor wiring or connector
- Faulty seat belt sensor
- Seat belt buckle or latch fault
- Restraint control module fault
Symptoms
- Airbag warning light on
- Seat belt warning may stay on
- Seat belt status may be misreported
How to diagnose it
- Read the restraint control module's B0051 subfault and freeze-frame data with a compatible scan tool before clearing the code.
- Check that the first-row center belt and buckle are present, latch normally, and are not obstructed or damaged.
- Inspect the center buckle sensor connector and wiring along the seat for loose connections, corrosion, pin damage, or damage from seat movement.
- Watch the first-row center belt-status data while latching and releasing the buckle and note whether the reported state follows it.
- Test the center sensor and its circuit according to the manufacturer's procedure before suspecting the restraint control module.
Common fixes
- Reconnect or repair damaged wiring to the first-row center buckle sensor.
- Repair corroded or damaged connector terminals.
- Replace the faulty center seat-belt sensor or buckle assembly as specified for the vehicle.
- Repair or replace the restraint control module only after the sensor circuit and module connections are verified.
Can I keep driving?
The vehicle may be driveable, but the restraint system may not correctly recognize the first-row center belt, and an airbag warning can indicate a broader restraint-system fault. Have it diagnosed promptly and do not use that seating position unless its belt latches securely.
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.