Airbags

B0041 — Open circuit or fault in left side airbag deployment loop

Severity: high Drive with care, to a shop

What B0041 means

The SRS control module constantly tests the circuit that fires the left side airbag's initiator (squib). B0041 means it found an open circuit or other fault in that loop, so current does not flow as expected. For safety, the module may disable that airbag, so it may not deploy in a crash.

Symptoms

  • Airbag (SRS) warning light is on
  • Left side airbag may not deploy in a crash
  • Fault comes and goes and may clear after a reset
  • Warning light flickers when turning the wheel or hitting bumps

Possible causes

  1. Open, damaged or chafed wiring in the deployment loop
  2. Corroded or loose connectors under the seat or in the steering column
  3. Failed clock spring (steering wheel rotary coupler)
  4. Faulty airbag module or its initiator
  5. Faulty SRS control module (uncommon)

How to diagnose

  1. Scan the SRS module with a tool that can read it and record all codes and freeze data
  2. Determine whether the fault is constant or intermittent and look for other SRS codes
  3. Inspect the left airbag wiring and connectors for damage, corrosion and a secure fit
  4. If seats, steering wheel or interior were recently worked on, confirm every connector is plugged in
  5. Test the clock spring: check circuit resistance and whether the fault changes when turning the wheel
  6. Measure loop resistance per the factory wiring diagram, following SRS safety procedures
  7. Test the SRS module only after wiring and airbag module check out

Common fixes

  • Repair the wiring or replace damaged connectors
  • Replace the clock spring
  • Replace the airbag module or its initiator
  • Replace the SRS control module if it is confirmed faulty

Questions and answers

Can I drive with code B0041?

The car will run, but the left airbag may not deploy in a crash. Get it diagnosed and repaired soon.

Can I test the airbag circuit myself?

Not with an ordinary multimeter or by unplugging connectors without disconnecting the battery and following the service procedure, since an airbag could deploy accidentally. This job is best left to a professional.

Is clearing the B0041 code enough?

No. If the fault is still there, the code will return and the airbag stays disabled. Find and fix the cause first.

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.