B0001 code meaning
Driver Frontal Stage 1 Deployment Control
What B0001 means
The restraint control module tests the firing loop of the first inflator stage in the driver airbag, which sits in the steering wheel hub and is fed through the clock spring. B0001 is stored when that loop is open, shorted or outside its resistance window; the fault byte added to the code names the exact type. Mercedes-Benz logs B000113 for an open stage 1 squib, Honda used B0001-13 on the 2013 Civic, Mitsubishi files it under the driver airbag module, FCA under squib 1, and GM on its 2020-21 full-size trucks, where B0001-1B came from rust particles at the airbag connector raising the resistance (bulletin 21-NA-005). Stage 1 is the charge used in every deployment, so a fault here can cost the driver frontal protection. The airbag warning lamp stays lit.
B0001 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyWorkshop only
- Typical labor1 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of B0001
- Airbag warning lamp or service airbag message stays on
- Driver frontal airbag may not deploy in a crash
- Safety note: do not probe the airbag circuit yourself; unplug airbag connectors only with the battery disconnected and the stated wait time observed
Common causes of B0001
- Most likelyCorroded or poorly seated connector between steering wheel harness and airbag module
- PossibleBroken or worn conductor in the clock spring
- PossibleInternal fault in the driver airbag module (stage 1 squib)
- Less likelyChafed lead in the steering wheel or column harness
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Driver airbag moduleClock springSRS wiringSRS control module
What each part of B0001 means
| B | Body system: airbags, seat belts, power seats, lights and climate control. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 01 | The exact fault in that area. |
What to do next
- Note B0001 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about B0001
What does B0001 mean?
B0001 means "Driver Frontal Stage 1 Deployment Control". The restraint control module tests the firing loop of the first inflator stage in the driver airbag, which sits in the steering wheel hub and is fed through the clock spring. It is a generic code, so it means the same on every make.
Is it safe to drive with B0001?
B0001 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will B0001 fail an emissions test?
B0001 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is B0001 to fix?
Difficulty: workshop only. A typical repair takes 1 to 3 hours of work. This is a job for a workshop.
Will B0001 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.