B0001
Driver Frontal Stage 1 Deployment Control.
- Generic
- Body
- Generic code
- High severity
How this code is built
- B
- SystemBody
- 0
- Defined bySAE, the same on every car
- 0
- AreaBody area 0
- 01
- FaultThe specific fault in that area
What it means
B0001 is the generic SAE J2012 code for the driver frontal stage 1 deployment control circuit in the airbag (SRS) system. The SRS control module has detected a fault in the circuit or stage 1 squib for the driver's frontal airbag, such as an open circuit, a short or a resistance outside the expected range. The airbag warning light will normally be on and the system may not deploy correctly in a crash.
Symptoms
- Airbag or SRS warning light on the dashboard
- SRS light flashing or staying on after start-up
- Driver airbag may not deploy in a collision, or may deploy incorrectly
- Horn or steering wheel controls intermittently not working
- Failed SRS check at an MOT or inspection
Possible causes
- Faulty or damaged clockspring (spiral cable) behind the steering wheellikely
- Poor connection or corrosion at the driver airbag connector or under-steering-column connectorslikely
- Driver airbag module (squib) fault or incorrect resistancepossible
- Damaged wiring between the SRS control module and the clockspring, including chafing or short to earth or voltagepossible
- Previous steering wheel or airbag work with a connector not seated or a wrong part fittedpossible
- Faulty SRS control modulerare
How to diagnose
- Read all stored SRS and related codes and note whether B0001 is current, history or intermittent; record any freeze frame or status data available
- Ask about recent work on the steering wheel, column, seat or battery, and check for crash or water damage history
- Visually inspect the airbag connectors at the steering wheel and column for damage, corrosion, bent pins and locking clips not fully latched
- Follow the manufacturer's safety procedure first: disconnect the battery and wait the specified time before touching any airbag connector, and never probe squib circuits with a standard test lead or meter
- Check wiring for chafing, pinching or signs of repair between the clockspring and the SRS control module, including continuity and shorts to earth or supply using the manufacturer's approved method
- Check the clockspring and airbag circuit resistance using the manufacturer's specified procedure and values, which vary by model
- Substitute a known-good airbag or clockspring only where the manufacturer procedure permits, then clear the code and retest
- Confirm the repair by clearing the code, cycling the ignition and checking the SRS light stays off with no codes returning
How to fix
- Reseat, clean or replace damaged or corroded airbag connectors
- Replace the clockspring if its resistance or continuity is out of specification
- Repair or replace damaged wiring in the driver airbag circuit
- Replace the driver airbag module if it is faulty, using a correct part for the vehicle
- Replace or reprogram the SRS control module only after the rest of the circuit has been proven good and the manufacturer procedure calls for it
Can I keep driving?
The car may be driven carefully to a workshop, but the driver airbag may not work in a crash, so have it repaired promptly. Do not attempt DIY work on airbag components without following the safety procedure.
Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.