DTC codes / B00xx · Airbags, seats, doors, lights and comfort systems / B0084
B0084 indicates that the body control module (BCM) or restraint control module has detected an abnormal condition in the driver's seat belt buckle switch circuit, which is used to determine whether the driver's seat belt is latched. The computer monitors the switch signal and sets this code when the voltage or resistance falls outside the expected range for the buckle's latched or unlatched state.
Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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