Airbags

B0011 — Passenger Frontal Airbag Stage 2 Deployment Control Circuit Fault

Severity: high Drive with care, to a shop

What B0011 means

The SRS control module detected a problem in the circuit that fires the second stage of the passenger frontal airbag. This can be an open, a short, an out-of-range resistance or a failed airbag module. A dual-stage airbag deploys with different force depending on crash severity, so this fault can keep it from working properly.

Symptoms

  • Airbag/SRS warning light on or flashing
  • Warning light stays on after the engine starts
  • Passenger airbag off indicator behaves abnormally
  • Scan tool shows B0011 in the SRS module
  • Fault comes and goes with bumps or seat movement

Possible causes

  1. Damaged wiring or connector in the passenger airbag circuit
  2. Corrosion or poor contact in a connector under the dash
  3. Faulty passenger airbag module (inflator or initiator circuit)
  4. Failed SRS control module
  5. Power or ground problem at the SRS module
  6. Prior deployment where components were not replaced
  7. Software or calibration mismatch in the SRS module

How to diagnose

  1. Read all SRS codes with a scan tool that supports airbags and note the freeze frame data
  2. Ask about past collisions, airbag deployments, or dash and seat repairs
  3. Inspect connectors and harness under the dash on the passenger side and at the SRS module for corrosion and pinching
  4. Check battery voltage and the SRS module power and ground
  5. Disconnect the battery and wait the specified time, then measure circuit resistance per the service diagram (follow procedure, never apply power to the initiator)
  6. Look for service bulletins and software updates for the SRS module
  7. Clear the code and see whether it returns immediately or only under certain conditions

Common fixes

  • Repair or replace damaged wiring and connectors
  • Replace the passenger airbag module
  • Replace the SRS control module and configure it to the vehicle
  • Update or reflash SRS software where the manufacturer provides it

Questions and answers

What does B0011 mean?

The SRS module found a fault in the Stage 2 circuit of the passenger frontal airbag. The airbag may not deploy at full force, or at all.

Can I fix an airbag circuit myself?

Reading codes and visually checking connectors is fine, but working on airbag modules and initiators risks accidental deployment. Leave the repair to a qualified technician.

Why is the SRS light still on after the repair?

The code must be cleared with a scan tool that supports SRS. If it returns, the fault remains, a connection is still poor, or the module needs replacement or configuration.

This is general information about the code. The meaning can differ between makes and models: a scan tool and the repair manual for your car will show the exact cause.