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Engine-Codes – Generic – B1186

B1186 Code - Open In Passenger Side Air Bag Second Stage Squib Circuit

Quick Answer

The B1186 diagnostic trouble code (DTC) indicates an open in the passenger side airbag second stage squib circuit. Common causes include Damaged wiring or connectors in the passenger side airbag circuit, Faulty passenger side airbag squib, Corrosion or poor connections in 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
B1186 indicates Open In Passenger Side Air Bag Second Stage Squib Circuit.
Common causes
Common causes include Damaged wiring or connectors in the passenger side airbag circuit, Faulty passenger side airbag squib, Corrosion or poor connections in 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.
What is this?
Table of contents Created and updated by William Orellana on Sep 15, 2024
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Code B1186 Description

The B1186 diagnostic trouble code (DTC) indicates an open in the passenger side airbag second stage squib circuit. The second stage squib is a component of the airbag system that is responsible for deploying the airbag with a specific force in the event of a collision. An open circuit in this component can prevent the airbag from deploying properly, compromising the safety of the vehicle occupants.

OBDII Code B1186 - Open In Passenger Side Air Bag Second Stage Squib Circuit
B1186 Code - Open In Passenger Side Air Bag Second Stage Squib Circuit

Common Causes of B1186

  1. Damaged wiring or connectors in the passenger side airbag circuit
  2. Faulty passenger side airbag squib
  3. Corrosion or poor connections in the airbag system
  4. Impact or collision that damaged the airbag system components

Symptoms of B1186

  1. Airbag warning light on the dashboard
  2. Non-deployment of the passenger side airbag in a collision
  3. Inconsistent or delayed deployment of the airbag
  4. Intermittent loss of communication with the airbag system

How to Fix B1186

  1. Begin by disconnecting the vehicle's battery to prevent accidental deployment of the airbag system.
  2. Inspect the wiring and connectors in the passenger side airbag circuit for any damage or corrosion. Repair or replace any faulty components.
  3. Test the passenger side airbag squib for continuity and proper function. Replace if necessary.
  4. Clear the DTC from the vehicle's memory using a diagnostic scan tool.
  5. Reconnect the battery and test the airbag system to ensure proper deployment.

Cost to Fix B1186

The cost of repairing an open in the passenger side airbag second stage squib circuit can vary depending on the extent of the damage and the specific components that need to be replaced. On average, the repair costs for this issue can range from $200 to $500, including parts and labor. However, it is important to note that labor rates at auto repair shops can vary widely, so it is advisable to obtain quotes from multiple shops in your area to get a more accurate estimate. Additionally, the cost of diagnostic time and any additional repairs that may be needed should be factored into the overall cost.

Need more information about the B1186 code?

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Code B1186 Information for Specific Makes

  • B1186 Lexus — Open In Passenger Side Air Bag Second Stage Squib Circuit
  • B1186 Scion — Open In Passenger Side Air Bag Second Stage Squib Circuit
  • B1186 Toyota — Open In Passenger Side Air Bag Second Stage 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 B1186 Code

1. What are common symptoms of OBDII code B1186 (Open In Passenger Side Air Bag Second Stage Squib Circuit)?

The common symptoms include the airbag warning light illuminating on the dashboard and the airbag system being disabled.

2. What are the potential causes of OBDII code B1186?

The code B1186 can be caused by a faulty passenger side airbag second stage squib, damaged wiring or connectors in the circuit, or a problem with the airbag control module.

3. How can I diagnose the source of the issue related to OBDII code B1186?

You can diagnose the issue by using a diagnostic scanner to retrieve the fault codes, inspecting the wiring and connectors for damage, and conducting a continuity test on the passenger side airbag second stage squib.

4. Can I drive my vehicle with OBDII code B1186?

It is not recommended to drive the vehicle with an active B1186 code, as it indicates a potential issue with the passenger side airbag system, which could affect its deployment in the event of a collision.

5. How can I repair OBDII code B1186?

To repair the B1186 code, you may need to replace the passenger side airbag second stage squib, repair any damaged wiring or connectors in the circuit, or reprogram the airbag control module if necessary.

6. Is it safe to attempt to repair OBDII code B1186 on my own?

It is recommended to have the B1186 code diagnosed and repaired by a qualified automotive technician or a professional who has experience working with airbag systems, as improper handling can be dangerous.

7. Are there any safety precautions to consider when working on the airbag system related to OBDII code B1186?

When working on the airbag system, always disconnect the vehicle's battery and wait at least 10 minutes before starting any repair to avoid accidental airbag deployment.

8. Can OBDII code B1186 be intermittent?

Yes, the B1186 code can sometimes be intermittent, meaning the issue may come and go. It is essential to address the problem promptly, even if the symptoms disappear temporarily.

9. How much does it typically cost to repair OBDII code B1186?

The cost of repairing the B1186 code can vary depending on the cause of the issue, the required parts, and the labor rates of the repair shop. It's best to get a diagnostic and repair estimate from a trusted mechanic.

10. Will resetting the OBDII code B1186 make the problem go away?

Resetting the B1186 code may clear the fault temporarily, but if the underlying issue is not addressed, the code is likely to reappear. It's crucial to diagnose and repair the root cause of the problem to ensure the safety of the airbag system.

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