Airbags

B0029 — Right Front/Passenger Airbag Deployment Loop Open

Severity: high Drive with care, to a shop

What B0029 means

During its self-test, the SRS control module checks the resistance of the right airbag squib circuit (front passenger or curtain, depending on the vehicle). B0029 is set when the loop is open or its resistance is too high. The system cannot be sure the airbag will fire, so it turns on the SRS warning light.

Symptoms

  • SRS/Airbag warning light is on or flashing
  • Right airbag may not deploy in a collision
  • Other SRS codes may be stored
  • Light may go out and return when the seat is moved or the car hits bumps

Possible causes

  1. Open or damaged wiring in the right airbag circuit (most common)
  2. Corroded or loose connector, such as under the seat or in the pillar
  3. Faulty airbag module (squib or inflator)
  4. Damaged harness after seat, trim or interior work
  5. Faulty SRS control module (rare)

How to diagnose

  1. Scan all codes with a tool that supports SRS and save the freeze frame data
  2. Inspect the right airbag harness and connectors for damage, corrosion, bent pins and signs of past repairs
  3. Ask about recent interior work: seat removal, trim, glass replacement or collision repair
  4. Disconnect the battery and wait the time specified by the manufacturer to prevent accidental deployment
  5. Check circuit continuity and resistance per the factory wiring diagram; never probe a squib directly with a multimeter
  6. Verify the circuit with a known-good module or a factory-approved load simulator
  7. Clear the code after repair and confirm it does not return

Common fixes

  • Repair or replace damaged wiring
  • Clean or replace a corroded connector
  • Replace the faulty right airbag module
  • Replace the SRS control module if the circuit and module test good

Questions and answers

Can I drive with B0029?

Yes, but the right airbag may not deploy in a crash. Don't put off diagnosis for long.

Can I just clear the B0029 code?

Clearing it may turn the light off briefly, but a real open circuit will bring the code back. Find and fix the cause first.

Why did B0029 appear after interior work?

Seat, trim or pillar removal can unplug or damage the airbag connector. Check the connections in those areas 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.