OBD-II trouble code
B0011: Passenger Frontal Stage 2 Deployment Control (Subfault)
The airbag/SRS control module detected an electrical fault in the second-stage firing loop for the passenger's frontal airbag. The passenger airbag may not deploy at full force as designed, so this needs prompt professional attention.
Quick facts
- System
- Body
- Category
- Airbag / SRS Restraints
- Severity
- High severity
- Drivable
- Usually safe to drive short-term
- Repair cost range
- $100 – $900
- DIY difficulty
- Shop recommended
What does B0011 mean?
B0011 is a body (B) code stored by the airbag control module — the SDM (sensing and diagnostic module) on GM, or the RCM (restraints control module) on many other makes. Its SAE-generic definition is 'Passenger Frontal Stage 2 Deployment Control,' referring to the second firing loop of the passenger's frontal airbag in the dashboard. Multi-stage airbags fire in stages: Stage 1 (code B0010) provides a softer inflation for lower-speed impacts, while Stage 2 adds full force for higher-speed crashes. B0011 is the direct companion of B0010 and the passenger-side counterpart of the driver code B0002. As with all B-codes, confirm the exact application against your make's service data.
The module sets the code when the stage 2 deployment loop's resistance falls outside the tight window these pyrotechnic circuits require — an open circuit, a short to power or ground, or resistance that is too high or too low. A symptom byte appended to the code identifies the exact fault type. The passenger airbag's firing loops run through the dash harness to a connector behind the glovebox or lower dash. When both B0010 and B0011 appear together, a shared connector or the airbag assembly itself is the likely culprit rather than two independent inflator failures.
This is a supplemental restraint fault, not a driveability fault: the vehicle drives normally, but the passenger's frontal airbag may not deliver full-force deployment as intended in a severe crash, and airbag circuits carry a small risk of unintended deployment when mishandled. SRS diagnosis and repair should be performed by a qualified technician who can safely disable the system, and the fault should not be left unrepaired.
Common causes
- Corroded, backed-out, or loose connector at the passenger airbag (behind the glovebox or lower dash)
- Damaged wiring in the passenger frontal stage 2 firing loop
- Failed passenger airbag inflator (squib) for the stage 2 circuit
- Fault in the SRS connector or its shorting bar at the airbag
- Connector disturbed by recent glovebox or dashboard work
- Faulty airbag/SRS control module (SDM/RCM)
Symptoms
- Airbag / SRS warning light on
- Stored B0011 fault (often with a symptom byte) in the restraints module
- No effect on engine or driving performance
- Frequently stored together with B0010 (stage 1) when the connector or airbag is at fault
Diagnostic steps
- 1.Use a scan tool that can access the airbag/SRS module and record B0011 with its full symptom byte and any companion codes.
- 2.Note whether B0010 (stage 1) is also set — both stages sharing a fault points to the connector or airbag rather than a single inflator.
- 3.With the system safely disabled per service procedure, inspect the passenger airbag connector behind the glovebox and lower dash for corrosion, backed-out terminals, or damage.
- 4.Check for recent glovebox, dash, or airbag work that could have disturbed the connector.
- 5.Measure the stage 2 deployment-loop resistance against specification to separate a wiring/connector fault from a failed inflator.
- 6.If the airbag or module was recently replaced, verify the correct part and proper programming.
- 7.Repair the wiring/connector fault or replace the indicated component, then clear codes and confirm the SRS light stays off.
Repair cost
$100 – $900
A connector repair behind the glovebox can be modest, while a failed inflator or control module is much costlier. SRS diagnostic time typically runs $100-$200, and a passenger airbag or SDM/RCM replacement with programming can reach several hundred dollars or more. SRS work should be done by a qualified technician.
Estimate your repair
Run the numbers for your vehicle
Open the Repair Cost Estimator with airbag control module (sdm) replacement / reset preselected. Adjust labor rate and vehicle category to fit your situation.
DIY vs shop
Leave this one to a qualified shop. It typically involves emissions-critical components, refrigerant handling, or other work that requires manufacturer-grade tooling, training, or certification. DIY attempts often produce a more expensive problem than the original code.