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DTC codes / B01xx · Airbags, seats, doors, lights and comfort systems / B0110

B0110Driver Pelvic/Thorax Airbag Deployment Control

B0110 indicates that the airbag control module has detected a fault in the deployment circuit for the driver's pelvic or thorax airbag, which is often part of a side-impact airbag system. The computer monitors the circuit's resistance and continuity, and when the readings fall outside the expected range, it stores this code and illuminates the airbag warning light.

SystemBody
Code typeGeneric (all makes)
SeverityHigh
Fix difficultyProfessional
AreaAirbags, seats, doors, lights and comfort systems

Symptoms you may notice

  • The airbag warning light stays on after the bulb check, indicating a fault in the supplemental restraint system.
  • The driver's side airbag may be disabled, reducing protection in a side-impact collision.
  • Often no symptoms besides the warning light, as the fault may not affect drivability.
  • In some vehicles, a message such as 'Service Airbag' or 'Check Airbag System' appears on the driver information center.
  • Intermittent warning light operation if the fault is caused by a loose connection or chafed wire.
  • The seat-mounted airbag may not deploy in a crash, which the occupant may not notice until an accident occurs.

Common causes, most likely first

  1. Damaged or chafed wiring in the driver's seat harness, often where it flexes with seat movement.
  2. Loose or corroded connector at the driver's pelvic/thorax airbag module or under the seat.
  3. Faulty clock spring (spiral cable) in the steering wheel, which can affect circuits routed through it.
  4. Failed driver's pelvic/thorax airbag module or its internal squib.
  5. Water intrusion or corrosion in the seat-mounted airbag connector.
  6. Aftermarket seat covers or accessories that interfere with the airbag wiring or connector.
  7. Internal fault in the airbag control module (less common).

How to diagnose and fix it

  1. Inspect the driver's seat wiring harness and connectors for damage, corrosion, or loose pins, and repair as needed.
  2. Check the clock spring for continuity and damage, especially if other steering wheel controls are malfunctioning.
  3. Use a diagnostic scan tool to read live data and perform a resistance test on the airbag circuit to isolate the fault.
  4. Disconnect the battery and wait the recommended time, then measure the resistance of the airbag squib to compare with specifications.
  5. Replace the faulty driver's pelvic/thorax airbag module if resistance is out of range and wiring is confirmed good.
  6. Clear the code and verify the repair by cycling the ignition and confirming the warning light goes out.
  7. If the fault persists, consult a professional technician for advanced diagnostics of the airbag control module.

Before you replace the airbag module

  • A common oversight is failing to check the seat wiring harness for chafing where it passes through the seat frame, which can cause intermittent shorts.
  • The clock spring is often overlooked because it is not directly part of the pelvic/thorax circuit, but it can affect shared ground or power feeds.
  • Aftermarket seat covers or objects stored under the seat can pinch or damage the airbag wiring, leading to this code.
  • The code does not always mean the airbag itself is defective; a simple loose connector can trigger it, so always inspect connections first.
  • Disconnecting the battery is critical before working on airbag circuits to prevent accidental deployment, and waiting the specified time is essential.

Can I keep driving with B0110?

It is not safe to ignore this code because the driver's pelvic/thorax airbag may not deploy in a collision, increasing the risk of injury. Avoid driving if possible until the fault is repaired, and do not attempt to diagnose or repair airbag circuits without proper training and safety precautions.

Tools that help

Tools we recommend are in the Auto Veteran shop on Amazon. As an Amazon Associate we earn from qualifying purchases.

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.

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