AutoCodes – Lexus – B1808 Lexus

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

Quick Answer

The Front Passenger Side Squib Circuit consists of the Center Airbag Sensor Assembly and the Front Passenger Airbag Assembly. Common causes include Instrument panel wire, Faulty Front Passenger Airbag Assembly (Front Passenger Side Squib), Front Passenger Airbag Assembly harness is open or shorted. 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 Lexus indicates Short To Positive In Front Passenger Side Squib Circuit.
Common causes: Common causes include Instrument panel wire, Faulty Front Passenger Airbag Assembly (Front Passenger Side Squib), Front Passenger Airbag Assembly harness is open or shorted.
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.

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Code Popularity 1,019

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 25, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1808 Lexus Description

The Front Passenger Side Squib Circuit consists of the Center Airbag Sensor Assembly and the Front Passenger Airbag Assembly. The circuit signals the Supplemental Restraint System (SRS) to deploy when deployment conditions are met. The Diagnostic Trouble Code (DTC) is recorded when the airbag sensor assembly detects a short circuit to a positive signal in the Front Passenger Side Squib Circuit for 0.5 seconds.

OBDII Code B1808 Lexus - Short To Positive In Front Passenger Side Squib Circuit - AutoCodes.com — B1808 Lexus Code - Short To Positive In Front Passenger Side Squib Circuit

What does this mean?

What are the Possible Causes of the DTC B1808 Lexus?

Instrument panel wire
Faulty Front Passenger Airbag Assembly (Front Passenger Side Squib)
Front Passenger Airbag Assembly harness is open or shorted
Front Passenger Airbag Assembly circuit poor electrical connection
Faulty Center Airbag Sensor Assembly

How to Fix the DTC B1808 Lexus?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1808 Lexus code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B1808 Lexus code?

Need more information on how to fix the B1808 Lexus code? Get Access to Factory Service Manuals

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Get the B1808 Lexus code diagnosed by a professional: Find a repair shop in your area

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 Lexus Code

1. What are the common symptoms of OBDII code B1808 in a Lexus related to a short to positive in the front passenger side squib circuit?

The common symptoms include the airbag warning light illuminating on the dashboard and potential non-deployment of the passenger-side airbag in the event of a collision.

2. What are the possible causes of OBDII code B1808 in a Lexus indicating a short to positive in the front passenger side squib circuit?

Possible causes include damaged wiring or connectors in the front passenger side airbag system, a faulty squib circuit, or a malfunctioning airbag control module.

3. How can I diagnose OBDII code B1808 in my Lexus to confirm a short to positive in the front passenger side squib circuit?

Diagnosis typically involves using a OBDII scanner to retrieve the specific fault code, inspecting the wiring and connectors in the front passenger side airbag system, and performing circuit tests to identify the location of the short to positive.

4. Is it safe to drive my Lexus with OBDII code B1808 indicating a short to positive in the front passenger side squib circuit?

It is not recommended to drive the vehicle with this fault code present, as it indicates a potential issue with the passenger-side airbag system, which could affect occupant safety in the event of a collision.

5. Can I repair OBDII code B1808 related to a short to positive in the front passenger side squib circuit on my own?

Repairing this issue may require specialized knowledge and tools, so it is advisable to consult a professional mechanic or a Lexus dealership to accurately diagnose and repair the problem.

6. How much does it typically cost to repair OBDII code B1808 in a Lexus caused by a short to positive in the front passenger side squib circuit?

The cost of repair can vary depending on the specific cause of the issue, but it may involve replacing damaged wiring, connectors, or components in the front passenger side airbag system, which can range from a few hundred to over a thousand dollars.

7. Are there any safety precautions I should take when working on OBDII code B1808 in a Lexus due to a short to positive in the front passenger side squib circuit?

When working on the airbag system, it is crucial to disconnect the vehicle's battery and wait for a specified amount of time to discharge any stored energy to avoid accidental deployment of the airbags.

8. How long does it typically take to repair OBDII code B1808 linked to a short to positive in the front passenger side squib circuit in a Lexus?

The repair time can vary depending on the extent of the damage and the availability of parts, but it may take a few hours to a full day to diagnose and fix the issue.

9. Can OBDII code B1808 in a Lexus be triggered intermittently due to a short to positive in the front passenger side squib circuit?

Yes, intermittent faults can sometimes occur in the airbag system, leading to the sporadic illumination of the airbag warning light and potential issues with the passenger-side airbag deployment.

10. Will resetting the OBDII code B1808 related to a short to positive in the front passenger side squib circuit in a Lexus make the problem go away?

Resetting the fault code may temporarily clear the warning light, but it will not fix the underlying issue causing the short to positive in the front passenger side squib circuit. It is essential to diagnose and repair the problem to ensure the airbag system functions correctly.