What it means
This code identifies a fault associated with the second row left 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 second-row left seat-belt sensor sends that seating position's belt status to the restraint control module. The module monitors the sensor signal and circuit for an abnormal condition; the exact fault type is given 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 B0053 subfault and freeze-frame data with a scan tool that accesses the restraint control module before clearing the code.
- Check that the second-row left belt and buckle latch and release normally and that the belt is not trapped or damaged.
- Inspect the left second-row buckle connector and wiring, especially where seat folding or sliding could pull or pinch it.
- Monitor the second-row left belt-status signal while latching and releasing the buckle to check whether the reported state changes.
- Test the sensor and wiring to the restraint control module using the manufacturer's procedure before considering module failure.
Common fixes
- Restore a loose connection or repair wiring at the second-row left buckle.
- Repair corrosion or damaged terminals in the sensor connector.
- Replace the faulty second-row left seat-belt sensor or buckle assembly.
- Repair or replace the restraint control module only after its connections and the sensor circuit pass testing.
Can I keep driving?
The vehicle may be driveable, but the system may not correctly recognize the second-row left belt, and the airbag warning can signal reduced restraint-system readiness. Confirm that 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.