B1150 Code - Left Side Curtain Air Bag Module Open

Quick Answer

The B1150 diagnostic trouble code indicates that there is an issue with the left side curtain airbag module being open. Common causes include Faulty left side curtain airbag module, Loose or damaged wiring connections to the airbag module, Impact or damage to the vehicle that triggered the airbag system. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means

B1150 indicates Left Side Curtain Air Bag Module Open.

Common causes

Common causes include Faulty left side curtain airbag module, Loose or damaged wiring connections to the airbag module, Impact or damage to the vehicle that triggered the airbag system.

Severity

High - diagnose this code as soon as possible.

Can I drive?

Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

• Description
• Common Causes
• Symptoms
• How To Fix
• Cost to Fix
• FAQs
• Comments
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Common Causes of B1150

Symptoms of B1150

How to Fix B1150

Cost to Fix B1150

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Code B1150 Information for Specific Makes

• B1150 Acura — Gauge Control Module
• B1150 Honda — Gauge Control Module
• B1150 Infiniti — Left Side Curtain Air Bag Module Open
• B1150 Lexus — Occupant Classification System Malfunction
• B1150 Nissan — Left Side Curtain Air Bag Module Open
• B1150 Scion — Occupant Classification System Malfunction
• B1150 Toyota — Occupant Classification System Malfunction

Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service

• Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
• Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
• Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
• Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.

Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B1150 Code

What does OBDII code B1150 mean?

OBDII code B1150 indicates that there is an open circuit in the left side curtain airbag module, which can prevent the airbag from deploying in the event of a collision.

What are common symptoms of the B1150 code?

Common symptoms include the airbag warning light illuminated on the dashboard, and potential issues with the deployment of the left side curtain airbag during an accident.

What could cause the B1150 code to trigger?

The B1150 code can be triggered by a damaged wiring harness, a faulty airbag module, poor electrical connections, or issues with the airbag itself.

How can I diagnose the B1150 code?

To diagnose the B1150 code, inspect the wiring and connectors for damage, perform a continuity test on the airbag module, and use a scan tool to check for additional codes that may provide more context.

What repairs are typically needed for a B1150 code?

Repairs may include repairing or replacing damaged wiring, reconnecting loose connectors, or replacing the left side curtain airbag module if it is found to be faulty.

Can I reset the B1150 code without fixing the issue?

Resetting the B1150 code without addressing the underlying problem is not recommended, as the airbag system will remain disabled, posing a safety risk.

Is it safe to drive a vehicle with the B1150 code?

Driving a vehicle with the B1150 code is not safe, as it indicates a potential failure in the airbag system, which could result in an increased risk of injury during a collision.

How much does it typically cost to repair the B1150 code?

The cost to repair the B1150 code can vary widely depending on the specific issue, but it typically ranges from $100 to $1,000, depending on whether wiring repairs or module replacement is needed.

Do I need a professional to fix a B1150 code?

While some experienced DIYers may be able to address the issue, it is generally recommended to have a professional technician diagnose and repair airbag system problems to ensure safety and proper functionality.