B codebodyCritical severity

B0001Driver Frontal Stage 1 Deployment Control

The SRS (airbag) module has detected a fault in the driver-side frontal airbag deployment circuit.

Definition

B0001 is a safety-critical code. The airbag warning light will be on and the driver-side frontal airbag may not deploy in a crash. Do not work on the SRS system without disconnecting the battery and waiting the manufacturer-specified time for the capacitors to discharge.

Common causes

  • Failed clockspring in the steering column
  • Damaged airbag igniter wiring
  • Failed airbag module
  • Connector under the driver seat disconnected or damaged

Common misdiagnoses

  • Working on SRS components without first disabling the system and waiting for capacitor discharge — accidental deployment can cause serious injury.

Troubleshooting steps

  1. 1.Disconnect the battery

    Wait the manufacturer-specified time (commonly 60 seconds to 10 minutes) before working on SRS components.

  2. 2.Inspect the clockspring

    A failed clockspring in the steering column is the most common cause.

  3. 3.Verify connector engagement

    Check the airbag connector behind the steering wheel cover.

  4. 4.Have SRS work done by a qualified tech

    If you're not experienced with SRS, this is a job for a professional.