What are the common causes of B0050?

Open or short in the driver seat belt sensor wiring. A corroded or loose connector at the driver seat belt buckle. A failed driver seat belt sensor inside the buckle. Contamination in the buckle that blocks the sensor.

Read the SRS codes and note any other seat belt faults. Inspect the driver seat belt buckle connector for corrosion. Test the driver seat belt sensor circuit for opens and shorts. Watch the buckle switch state in live data as the belt latches. Replace the driver seat belt buckle if the sensor does not change state. Clear the code and retest.

B0050

Driver Seat Belt Sensor

System: Body control (B code)
Lamp: Airbag Light
Category: Body

What it means

B0050 means Driver Seat Belt Sensor.

Where it lives

For B0050, start at the sensor the description names.

Check these first

Open or short in the driver seat belt sensor wiring
A corroded or loose connector at the driver seat belt buckle
A failed driver seat belt sensor inside the buckle
Contamination in the buckle that blocks the sensor

What to do next

Read the SRS codes and note any other seat belt faults
Inspect the driver seat belt buckle connector for corrosion
Test the driver seat belt sensor circuit for opens and shorts
Watch the buckle switch state in live data as the belt latches
Replace the driver seat belt buckle if the sensor does not change state
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.