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B1808 Toyota Code - Short To Positive In Front Passenger Side Squib Circuit

Quick Answer

The B1808 diagnostic trouble code for Toyota vehicles indicates a "Short to Positive in Front Passenger Side Squib Circuit." This code specifically relates to an issue with the front passenger side airbag system's squib circuit. Common causes include Damaged wiring or connectors in the front passenger side squib circuit, Corrosion or moisture intrusion in the circuit components, Faulty front passenger side airbag squib. 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
B1808 Toyota indicates Short To Positive In Front Passenger Side Squib Circuit.
Common causes
Common causes include Damaged wiring or connectors in the front passenger side squib circuit, Corrosion or moisture intrusion in the circuit components, Faulty front passenger side airbag squib.
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 13, 2024
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Code B1808 Toyota Description

The B1808 diagnostic trouble code for Toyota vehicles indicates a "Short to Positive in Front Passenger Side Squib Circuit." This code specifically relates to an issue with the front passenger side airbag system's squib circuit. The squib is a small explosive device that inflates the airbag in the event of a collision. A short to positive in this circuit means that there is an unintended connection between the positive power supply and the circuit, which can lead to various safety concerns.

OBDII Code B1808 Toyota - Short To Positive In Front Passenger Side Squib Circuit
B1808 Toyota Code - Short To Positive In Front Passenger Side Squib Circuit

Common Causes of B1808 Toyota

  1. Damaged wiring or connectors in the front passenger side squib circuit.
  2. Corrosion or moisture intrusion in the circuit components.
  3. Faulty front passenger side airbag squib.
  4. Issues with the airbag control module.
  5. Previous collision or impact that damaged the airbag system components.

Symptoms of B1808 Toyota

  1. Illumination of the airbag warning light on the dashboard.
  2. Inability to turn off the airbag warning light even after resetting the system.
  3. Diagnostic trouble code B1808 stored in the vehicle's computer system.
  4. Non-deployment of the front passenger side airbag during a collision.

How to Fix B1808 Toyota

  1. Begin by disconnecting the vehicle's battery to prevent accidental deployment of the airbag system.
  2. Inspect the wiring and connectors in the front passenger side squib circuit for any damage, corrosion, or loose connections.
  3. Test the front passenger side airbag squib for proper functionality using a multimeter.
  4. Check the airbag control module for any faults or errors and reset if necessary.
  5. Clear the diagnostic trouble code from the vehicle's computer system and perform a test to ensure the issue has been resolved.

Cost to Fix B1808 Toyota

The cost of repairing a short to positive in the front passenger side 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's important to note that labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate. Additionally, the cost may increase if additional components need to be replaced or if there are underlying issues with the airbag system.

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Information for Specific Toyota Models

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 B1808 Toyota Code

1. What are the common symptoms of OBDII code B1808 Toyota (Short To Positive In Front Passenger Side Squib Circuit)?

The common symptoms include the airbag warning light illuminated on the dashboard, non-deployment of the passenger side airbag, and potential communication errors with the airbag system.

2. What can cause the OBDII code B1808 Toyota to trigger?

The code B1808 is typically triggered by a short to positive in the front passenger side squib circuit, which may be caused by damaged wiring, faulty connectors, or issues with the airbag control module.

3. How can I diagnose the source of the short to positive in the front passenger side squib circuit?

To diagnose the issue, you can perform a visual inspection of the wiring harness and connectors for any signs of damage or corrosion. Additionally, using a multimeter to test for continuity and resistance can help pinpoint the location of the short.

4. Is it safe to drive with the OBDII code B1808 Toyota active?

It is not recommended to drive with the B1808 code present, as it indicates a potential issue with the passenger side airbag system, which could result in the airbag not deploying during a collision.

5. Can I repair the short to positive in the front passenger side squib circuit myself?

Repairing the short to positive in the squib circuit may require advanced electrical diagnostic skills and knowledge of airbag systems. It is recommended to have the issue diagnosed and repaired by a qualified technician.

6. How much does it typically cost to repair the B1808 code on a Toyota?

The cost of repairing the B1808 code can vary depending on the extent of the damage and the specific components that need to be replaced. It is best to obtain a quote from a certified mechanic or dealership.

7. Will resetting the OBDII code B1808 clear the issue permanently?

Resetting the code may temporarily turn off the warning light, but if the underlying issue causing the short to positive in the squib circuit is not addressed, the code is likely to reappear.

8. Are there any recalls or technical service bulletins related to the B1808 code in Toyota vehicles?

It is recommended to check with Toyota dealerships or online databases for any recalls or technical service bulletins related to the B1808 code in specific Toyota models.

9. How long does it typically take to repair the short to positive in the front passenger side squib circuit?

The repair time can vary depending on the complexity of the issue and the availability of parts. In some cases, it may take a few hours to a full day to diagnose and repair the problem.

10. Can the B1808 code be caused by a faulty airbag sensor?

While a faulty airbag sensor can potentially contribute to the triggering of the B1808 code, it is more commonly associated with wiring or connector issues in the front passenger side squib circuit.

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