B0131 Code - Open Right Seat Belt Pretensioner Squib Circuit

Quick Answer

The B0131 code indicates an open circuit in the right seat belt pretensioner squib circuit. Common causes include Faulty seat belt pretensioner squib, Damaged wiring or connectors in the circuit, Corrosion or poor connections in the 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

B0131 indicates Open Right Seat Belt Pretensioner Squib Circuit.

Common causes

Common causes include Faulty seat belt pretensioner squib, Damaged wiring or connectors in the circuit, Corrosion or poor connections in the 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
• Comments
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Common Causes of B0131

Symptoms of B0131

How to Fix B0131

Cost to Fix B0131

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Code B0131 Information for Specific Makes

• B0131 Lexus — Open Right Seat Belt Pretensioner Squib Circuit
• B0131 Scion — Open Right Seat Belt Pretensioner Squib Circuit
• B0131 Toyota — Open Right Seat Belt Pretensioner Squib Circuit

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 B0131 Code

1. What does the OBDII code B0131 mean?

B0131 indicates an open circuit in the right seat belt pretensioner squib, which is part of the airbag system responsible for tightening the seat belt during a crash.

2. What are the symptoms of code B0131?

Common symptoms include the airbag warning light illuminated on the dashboard and the potential non-functioning of the right seat belt pretensioner during an accident.

3. What causes the B0131 code to appear?

The code can be triggered by a damaged seat belt pretensioner, corroded or loose wiring, a defective airbag control module, or poor electrical connections.

4. Can I drive with the B0131 code?

While the car may still drive, the right seat belt pretensioner might not function properly during a collision, compromising occupant safety.

5. How do I diagnose the B0131 code?

Start by visually inspecting the wiring and connectors for damage or corrosion. Use a multimeter to check for continuity in the circuit and verify the functionality of the pretensioner and control module.

6. How do I fix the B0131 code?

Repair may involve replacing the faulty seat belt pretensioner, repairing damaged wiring, cleaning corroded connectors, or resetting the airbag control module.

7. Can the B0131 code be cleared without repairs?

Clearing the code without addressing the underlying issue is not recommended, as the problem will likely return and compromise safety.

8. How much does it cost to repair the B0131 code?

Repair costs vary depending on the issue but typically range from $100 to $300 for wiring repairs or up to $600 or more for seat belt pretensioner replacement.

9. Is the B0131 code covered under warranty?

Seat belt components are often covered under extended warranties due to safety regulations, but this depends on your vehicle's manufacturer and warranty terms.

10. Can a weak battery cause the B0131 code?

A weak or failing battery is unlikely to cause this specific code but can sometimes contribute to electrical issues in the airbag system.