Fault code B2200 – a step-by-step guide to diagnosing and fixing it

Error code B2200 is displayed and the check engine light is on - what does this mean?

The DTC B2200 is recognized by the OBD/EOBD system and indicates a problem with the driver airbag circuit. This fault code relates to the airbag system and may have slightly different definitions for different manufacturers, but mainly relates to faults in the area of the driver's airbag or its control circuit.

What causes can this fault code have?

• Defective driver airbag
• Damaged wiring to the airbag unit
• Loose or corroded plug connections
• Defective airbag control unit
• Broken slip ring in the steering wheel
• Faulty airbag resistance values
• Short circuit in the airbag circuit
• Defective crash sensors

What symptoms occur in parallel with fault code B2200?

• Airbag warning light: The airbag indicator light is permanently illuminated or flashes in the dashboard
• Deactivated airbag system: The airbag system may be completely inoperative
• Warning tone: Audible warning signals when starting the vehicle
• Missing protective function: The driver's airbag does not deploy in an emergency
• Electronic malfunctions: Problems with other safety systems such as belt tensioners

How can the problem with error code B2200 be rectified?

• Repairing error code B2200 requires precise diagnosis and professional execution of the work.
• Read out the error code and check the circuit diagram: Using an OBD scanner, read out the exact fault code B2200, analyze freeze frame data and obtain the appropriate wiring diagram for the specific vehicle model to identify the affected components
• Completely check the airbag wiring: Check all wiring connections from the airbag control unit to the driver's airbag for damage, corrosion or loose connections and replace defective wiring or connectors
• Replace slip ring in steering wheel: Remove the slip ring (coil spring) in the steering wheel and replace with a new part, as this is often responsible for interruptions in the airbag circuit
• Diagnose and replace the airbag control unit: Test the control unit using professional diagnostic technology and replace with a new or reconditioned unit if defective, then reprogram the system
• Completely replace driver airbag unit: Remove the complete driver airbag and replace it with a new original unit, observing all safety regulations and then calibrate the system