AutoCodes – Lexus – B1865 Lexus

B1865 Lexus Code - Short In Front Passenger Side Knee Airbag Squib Circuit

Quick Answer

The Front Passenger Side Knee Airbag Squib Circuit consists of the Airbag Sensor Assembly and the Front Passenger Side Knee Airbag Assembly. Common causes include Faulty Front Passenger Side Knee Airbag Assembly (Front Passenger Side Knee Squib), Front Passenger Side Knee Airbag Assembly harness is open or shorted, Front Passenger Side Knee Airbag Assembly circuit poor electrical connection. 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: B1865 Lexus indicates Short In Front Passenger Side Knee Airbag Squib Circuit.
Common causes: Common causes include Faulty Front Passenger Side Knee Airbag Assembly (Front Passenger Side Knee Squib), Front Passenger Side Knee Airbag Assembly harness is open or shorted, Front Passenger Side Knee Airbag Assembly circuit poor electrical connection.
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 4,174

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 Jul 10, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1865 Lexus Description

The Front Passenger Side Knee Airbag Squib Circuit consists of the Airbag Sensor Assembly and the Front Passenger Side Knee Airbag Assembly. The circuit instructs the Supplemental Restraint System (SRS) to deploy when deployment conditions are met. The Diagnostic Trouble Code (DTC) is stored when a malfunction is detected in the Front Passenger Side Knee Airbag Squib Circuit.

OBDII Code B1865 Lexus - Short In Front Passenger Side Knee Airbag Squib Circuit - AutoCodes.com — B1865 Lexus Code - Short In Front Passenger Side Knee Airbag Squib Circuit

What does this mean?

What are the Possible Causes of the DTC B1865 Lexus?

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

How to Fix the DTC B1865 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 B1865 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 B1865 Lexus code?

Need more information on how to fix the B1865 Lexus code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1865 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 B1865 Lexus Code

1. What are the common symptoms of OBDII code B1865 in a Lexus related to a short in the front passenger side knee airbag squib circuit?

The common symptoms include an illuminated airbag warning light on the dashboard and potential non-deployment of the front passenger side knee airbag during a collision.

2. What can cause the OBDII code B1865 indicating a short in the front passenger side knee airbag squib circuit in a Lexus?

Possible causes include damaged wiring, a faulty airbag squib, a loose connection, or a problem with the airbag control module.

3. How can I diagnose and repair the short in the front passenger side knee airbag squib circuit in my Lexus triggering the B1865 code?

Diagnosis involves inspecting the wiring harness, connectors, and airbag components for damage or loose connections. Repair may involve replacing damaged wiring, the airbag squib, or addressing any issues with the airbag control module.

4. Is it safe to drive my Lexus with the OBDII code B1865 related to a short in the front passenger side knee airbag squib circuit?

It is not recommended to drive the vehicle with this code present, as it may affect the proper function of the front passenger side knee airbag in the event of a collision.

5. Can I reset the OBDII code B1865 in my Lexus related to the front passenger side knee airbag squib circuit short on my own?

While you can clear the code using an OBDII scanner, it is crucial to address the underlying issue causing the code to prevent potential safety risks associated with the airbag system.

6. How much does it typically cost to repair the short in the front passenger side knee airbag squib circuit triggering the OBDII code B1865 in a Lexus?

The cost of repair can vary depending on the specific issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

7. Will fixing the short in the front passenger side knee airbag squib circuit causing the OBDII code B1865 require a visit to a Lexus dealership?

While you can address the issue at a Lexus dealership, you may also seek assistance from a qualified independent mechanic specializing in airbag systems to diagnose and repair the problem.

8. How long does it typically take to repair a short in the front passenger side knee airbag squib circuit leading to the OBDII code B1865 in a Lexus?

The repair time can vary based on the extent of the damage and the availability of parts, but it may take a few hours to a full day to complete the necessary repairs.

9. Are there any safety precautions I should take when working on the front passenger side knee airbag squib circuit related to the OBDII code B1865 in my Lexus?

It is essential to disconnect the vehicle's battery and follow proper procedures outlined in the service manual to avoid accidental airbag deployment while working on the system.

10. Can a DIY enthusiast with some automotive experience tackle the repair of the front passenger side knee airbag squib circuit short causing the OBDII code B1865 in a Lexus?

While some DIY enthusiasts may have the skills to address simple wiring issues, repairing the airbag system requires specialized knowledge and tools, making it advisable to seek professional help for safety-critical components like airbags.