Airbags

B0111 — Airbag Deployment Indicator Circuit Fault

Severity: medium Safe to drive

What B0111 means

At key-on, the SRS module checks the circuit that drives the airbag warning lamp in the instrument cluster. B0111 is set when the module cannot confirm the lamp is being controlled and working normally. The cause can be the bulb or LED, the cluster itself, or the wiring between the cluster and the SRS module. The airbag system may be fine, but you could miss a warning about a real fault.

Symptoms

  • Airbag light does not come on at key-on
  • B0111 stored in the SRS module
  • Airbag light stays on or flashes
  • Other cluster-related codes may also appear

Possible causes

  1. Burned-out bulb or LED for the airbag indicator in the cluster
  2. Faulty instrument cluster
  3. Open or shorted wiring to the indicator
  4. Corroded or loose connectors at the cluster or SRS module
  5. Failed SRS module

How to diagnose

  1. Scan all modules with a tool that reads SRS codes and note the data
  2. Turn the key on and watch whether the airbag lamp lights during the cluster self-test
  3. Check for other SRS or cluster codes
  4. Inspect the cluster and SRS module connectors for corrosion or damage
  5. Test the wiring between the cluster and SRS module for opens and shorts to ground
  6. Verify power and ground at the instrument cluster
  7. Run the cluster actuator test with a scan tool if available
  8. Clear the code and see if it returns

Common fixes

  • Replace the indicator bulb or LED if serviceable
  • Repair the wiring and clean or fix connectors
  • Replace or repair the instrument cluster
  • Replace the SRS module if the fault is confirmed there

Questions and answers

Why does my airbag light not come on at startup?

The lamp normally lights briefly as a self-test. If it does not, the bulb, cluster or wiring may be faulty, which is what B0111 reports.

Will my airbags still deploy with B0111?

Probably, since the code points to the indicator circuit rather than the airbags. Only a proper scan can confirm it, because a dead lamp hides other faults.

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.