B1056 Code - Driver Air Bag Module Short

Quick Answer

The B1056 diagnostic trouble code indicates that there is a short circuit detected in the driver airbag module. Common causes include Electrical fault: A damaged wire, connector, or component in the driver airbag system can cause a short circuit, Water damage: Exposure to moisture or water infiltration can lead to corrosion in the airbag module's wiring, Impact damage: A collision or impact to the vehicle's front end can damage the driver airbag module and cause a short circuit. 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

B1056 indicates Driver Air Bag Module Short.

Common causes

Common causes include Electrical fault: A damaged wire, connector, or component in the driver airbag system can cause a short circuit, Water damage: Exposure to moisture or water infiltration can lead to corrosion in the airbag module's wiring, Impact damage: A collision or impact to the vehicle's front end can damage the driver airbag module and cause a short circuit.

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
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Common Causes of B1056

Symptoms of B1056

How to Fix B1056

Cost to Fix B1056

When is the Code Detected?

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Code B1056 Information for Specific Makes

• B1056 Acura — Relay Control Module Lost Communication With MICU
• B1056 Honda — Relay Control Module Lost Communication With MICU
• B1056 Infiniti — Driver Air Bag Module Short
• B1056 Nissan — Driver Air Bag Module Short

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 B1056 Code

1. What does the OBDII code B1056 mean?

B1056 indicates a short circuit in the driver airbag module wiring, which can prevent the airbag from deploying properly in the event of an accident.

2. What are the common symptoms of code B1056?

The most common symptoms include an illuminated airbag warning light on the dashboard and potentially disabled airbag functionality.

3. What causes the B1056 code to appear?

This code is typically caused by damaged, frayed, or shorted wiring in the driver airbag circuit, a faulty driver airbag module, or a malfunctioning clock spring.

4. Is it safe to drive with a B1056 code?

It is not safe to drive with this code as the driver airbag may not deploy in an accident, compromising occupant safety.

5. How is the B1056 code diagnosed?

A technician will use an OBDII scanner to confirm the code, inspect the airbag module wiring for damage, and test the clock spring and connectors for continuity and proper operation.

6. Can a faulty clock spring cause the B1056 code?

Yes, a damaged or worn-out clock spring can cause a short in the driver airbag circuit, triggering the B1056 code.

7. How can I fix the B1056 code?

Repairs may involve fixing or replacing damaged wiring, replacing the clock spring, or, in some cases, replacing the driver airbag module.

8. Can I clear the B1056 code without fixing the issue?

Clearing the code without addressing the underlying issue may temporarily turn off the warning light, but the problem will persist, and the code will likely return.

9. How much does it cost to repair a B1056 code?

Repair costs vary depending on the cause, but replacing a clock spring typically costs $100–$300, while airbag module repairs can range from $500–$1,000 or more.

10. Can a DIYer fix the B1056 code?

While experienced DIYers might handle basic wiring repairs, airbag system work is highly sensitive and should generally be performed by a professional to ensure safety.