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Engine-Codes – Generic – B1806

B1806 Code - Open in Front Passenger Side Squib Circuit

Quick Answer

The B1806 diagnostic trouble code indicates an open circuit in the front passenger side squib circuit. Common causes include Damaged wiring or connectors in the squib circuit, Faulty passenger side airbag squib, Corrosion or poor connection 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
B1806 indicates Open in Front Passenger Side Squib Circuit.
Common causes
Common causes include Damaged wiring or connectors in the squib circuit, Faulty passenger side airbag squib, Corrosion or poor connection 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.
What is this?
Table of contents Created and updated by William Orellana on Sep 06, 2024
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Code B1806 Description

The B1806 diagnostic trouble code indicates an open circuit in the front passenger side squib circuit. This circuit is part of the Supplemental Restraint System (SRS), specifically the airbag system. An open circuit means that there is a break or discontinuity in the electrical connection, preventing the squib (igniter) from receiving the necessary signal to deploy the airbag in the event of a collision. This can pose a serious safety risk as the airbag may not deploy properly, putting the vehicle occupants at increased risk of injury in a crash.

OBDII Code B1806 - Open in Front Passenger Side Squib Circuit
B1806 Code - Open in Front Passenger Side Squib Circuit

Common Causes of B1806

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

Symptoms of B1806

  1. Airbag warning light on the dashboard
  2. Inability to turn off the passenger airbag
  3. Non-deployment of the passenger airbag in a crash
  4. Fault code stored in the SRS module
  5. Loss of communication with the passenger side airbag sensor

How to Fix B1806

  1. Diagnose the issue using a scan tool to retrieve the fault code and pinpoint the location of the open circuit.
  2. Inspect the wiring harness and connectors for damage, corrosion, or loose connections. Repair or replace as necessary.
  3. Test the passenger side airbag squib for continuity and proper function. Replace if faulty.
  4. Clear the fault code from the SRS module and perform a test to ensure the airbag system is functioning correctly.
  5. If the issue persists, further troubleshooting may be required to identify any underlying problems with the SRS system.

Cost to Fix B1806

The cost of repairing an open in the front passenger side squib circuit can vary depending on the specific cause of the issue and the extent of the damage. In general, the parts needed for the repair, such as wiring harnesses, connectors, or a new squib, can range from $100 to $500. Labor costs typically range from $100 to $300, depending on the shop's hourly rate and the complexity of the repair. Overall, the total cost of addressing this issue could range from $200 to $800 or more. It is advisable to get a detailed quote from a reputable auto repair shop to accurately determine the cost for your specific vehicle.

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Code B1806 Information for Specific Makes

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 B1806 Code

1. What are common symptoms of OBDII code B1806 - Open in Front Passenger Side Squib Circuit?

- Common symptoms include the airbag warning light illuminating on the dashboard and potential loss of functionality of the front passenger side airbag.

2. What could cause the OBDII code B1806 to trigger?

- The code B1806 is typically triggered by an open circuit in the front passenger side airbag squib circuit, which may be caused by damaged wiring, a faulty squib connector, or a defective airbag module.

3. How serious is the OBDII code B1806 - Open in Front Passenger Side Squib Circuit?

- This code indicates a potential safety issue as it affects the front passenger side airbag system. It is crucial to address this issue promptly to ensure the airbag functions properly in case of an accident.

4. Can I continue driving with the OBDII code B1806 present?

- It is not recommended to drive the vehicle with the B1806 code active, as it may compromise the effectiveness of the front passenger side airbag in the event of a collision.

5. How can I diagnose the OBDII code B1806 - Open in Front Passenger Side Squib Circuit?

- Diagnosis typically involves using a scan tool to retrieve the code, inspecting the wiring and connectors in the front passenger side airbag system, and testing the components for continuity or resistance.

6. What are the possible repair options for OBDII code B1806?

- Repair options may include repairing or replacing damaged wiring, fixing loose connections, replacing the front passenger side airbag squib, or addressing any faults in the airbag module.

7. Is it safe to reset the OBDII code B1806 without fixing the underlying issue?

- Resetting the code without addressing the underlying problem may temporarily clear the warning light, but it will not fix the safety issue with the front passenger side airbag system. It is crucial to repair the root cause of the problem.

8. How much does it cost to repair OBDII code B1806?

- Repair costs for the B1806 code can vary depending on the extent of the damage and the specific components that need to be replaced. It is recommended to consult a professional mechanic for an accurate diagnosis and cost estimate.

9. Can I fix the OBDII code B1806 - Open in Front Passenger Side Squib Circuit myself?

- While some DIY enthusiasts may be able to diagnose and repair simple wiring issues, dealing with airbag systems requires specialized knowledge and tools. It is often best to seek assistance from a qualified mechanic to ensure the repair is done correctly and safely.

10. How can I prevent the OBDII code B1806 from recurring in the future?

- To prevent the B1806 code from recurring, it is essential to perform regular maintenance checks on the airbag system, including inspecting wiring harnesses for damage, ensuring connectors are secure, and addressing any issues promptly to avoid further damage.

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