P05B8
Restraint Deployment Signal Circuit/Open
Generic OBD-II
Common symptoms
What you'll notice
- Check for any loose or disconnected wiring in the restraint deployment signal circuit.
- Inspect and replace any damaged or worn
- out connectors related to the restraint deployment signal circuit.
- Test and potentially replace the restraint deployment sensor if it is faulty or malfunctioning.
- Inspect and repair any damage to the restraint deployment control module or replace it if necessary.
Common causes
Most likely first
- Faulty airbag control module
- Loose or disconnected wiring in the restraint deployment signal circuit
- Malfunctioning crash sensors
- Faulty restraint deployment signal circuit sensor
- Deteriorated or damaged restraint deployment signal circuit
How to diagnose & fix
Work through it in order
- Airbag warning light illuminating on the instrument panel
- Inability to deploy the airbags during a collision or accident
- Faulty or intermittent horn operation
- Failure of the cruise control system to activate
- Malfunctioning audio control buttons on the steering wheel
Read & clear P05B8 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.