AutoCodes – Lexus – B1868 Lexus

B1868 Lexus Code - Short To Positive 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: B1868 Lexus indicates Short To Positive 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 1,012

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 B1868 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 B1868 Lexus - Short To Positive In Front Passenger Side Knee Airbag Squib Circuit - AutoCodes.com — B1868 Lexus Code - Short To Positive In Front Passenger Side Knee Airbag Squib Circuit

What does this mean?

What are the Possible Causes of the DTC B1868 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 B1868 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 B1868 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 B1868 Lexus code?

Need more information on how to fix the B1868 Lexus code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1868 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 B1868 Lexus Code

1. What are the common symptoms of OBDII code B1868 in a Lexus related to the front passenger side knee airbag squib circuit?

The common symptoms include an illuminated airbag warning light on the dashboard and a potential malfunction of the front passenger side knee airbag.

2. What does the OBDII code B1868 "Short To Positive In Front Passenger Side Knee Airbag Squib Circuit" mean in a Lexus?

This code indicates that there is a short circuit to positive (voltage) detected in the front passenger side knee airbag squib circuit of the vehicle.

3. What are the possible causes of OBDII code B1868 in a Lexus?

Possible causes include damaged wiring in the front passenger side knee airbag circuit, a faulty knee airbag squib, or a problem with the airbag control module.

4. How can I diagnose the issue causing OBDII code B1868 in my Lexus?

Diagnosing this issue typically involves conducting a thorough inspection of the front passenger side knee airbag circuit, checking for damaged wiring, testing the knee airbag squib, and using a diagnostic scanner to read the fault codes.

5. Can I still drive my Lexus safely with OBDII code B1868 present?

It is not recommended to drive the vehicle with this code present, as it indicates a potential issue with the front passenger side knee airbag system, which could affect its functionality in the event of an accident.

6. Is it possible to reset OBDII code B1868 in a Lexus without fixing the underlying issue?

While you can clear the fault code using a diagnostic scanner, the code is likely to reappear until the underlying issue causing the short to positive in the front passenger side knee airbag squib circuit is addressed.

7. How can I repair OBDII code B1868 in a Lexus related to the front passenger side knee airbag squib circuit?

Repairing this code may involve repairing or replacing damaged wiring, replacing the knee airbag squib if faulty, or addressing any issues with the airbag control module.

8. Are there any safety precautions to take when working on the front passenger side knee airbag system in a Lexus?

It is crucial to disconnect the vehicle's battery and wait for the specified time before working on the airbag system to prevent accidental deployment and ensure safety.

9. Can I fix OBDII code B1868 in my Lexus by myself, or do I need to take it to a professional mechanic?

While some DIY enthusiasts may be able to address this issue, due to the safety implications of working on airbag systems, it is recommended to consult a professional mechanic or technician for proper diagnosis and repair.

10. How much can I expect to pay to repair OBDII code B1868 in a Lexus at a dealership or repair shop?

The cost of repairing this code can vary depending on the specific issue, parts needed, and labor costs. It is advisable to obtain quotes from different shops to determine the most cost-effective solution.