AutoCodes – Lexus – B19A5 Lexus

B19A5 Lexus Code - Short In Front Active Headrest Squib LH Circuit

Quick Answer

The Front Active Headrest Squib Left (LH) Circuit consists of the Center Airbag Sensor Assembly and the Active Headrest Inflator LH. Common causes include Faulty Active Headrest Inflator Assembly Left (LH) (Front Active Headrest Squib LH), Active Headrest Inflator Assembly Left (LH) harness is open or shorted, Active Headrest Inflator Assembly Left (LH) 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: B19A5 Lexus indicates Short In Front Active Headrest Squib LH Circuit.
Common causes: Common causes include Faulty Active Headrest Inflator Assembly Left (LH) (Front Active Headrest Squib LH), Active Headrest Inflator Assembly Left (LH) harness is open or shorted, Active Headrest Inflator Assembly Left (LH) 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 585

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 Aug 02, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B19A5 Lexus Description

The Front Active Headrest Squib Left (LH) Circuit consists of the Center Airbag Sensor Assembly and the Active Headrest Inflator LH. This circuit instructs the Supplemental Restraint System (SRS) to deploy when deployment conditions are met. The Diagnostic Trouble Code (DTC) is recorded when a malfunction is detected in the Front Active Headrest Squib LH Circuit.

OBDII Code B19A5 Lexus - Short In Front Active Headrest Squib LH Circuit - AutoCodes.com — B19A5 Lexus Code - Short In Front Active Headrest Squib LH Circuit

What does this mean?

What are the Possible Causes of the DTC B19A5 Lexus?

Faulty Active Headrest Inflator Assembly Left (LH) (Front Active Headrest Squib LH)
Active Headrest Inflator Assembly Left (LH) harness is open or shorted
Active Headrest Inflator Assembly Left (LH) circuit poor electrical connection
Faulty Center Airbag Sensor Assembly

How to Fix the DTC B19A5 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 B19A5 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 B19A5 Lexus code?

Need more information on how to fix the B19A5 Lexus code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B19A5 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 B19A5 Lexus Code

1. What are the common symptoms of OBDII code B19A5 (Short In Front Active Headrest Squib LH Circuit) in a Lexus?

The common symptoms include the airbag warning light illuminating on the dashboard, loss of functionality in the front active headrest system, and potential triggering of diagnostic trouble codes related to the airbag system.

2. What are the possible causes of OBDII code B19A5 in a Lexus?

Possible causes of this code include a short circuit in the wiring harness of the front active headrest squib LH circuit, faulty connectors, damaged wiring, or a malfunctioning front active headrest squib LH unit.

3. How can I diagnose the OBDII code B19A5 in my Lexus?

Diagnosing this code typically involves using a diagnostic scanner to retrieve the specific fault code, inspecting the wiring and connectors associated with the front active headrest squib LH circuit, and testing the front active headrest squib LH unit for proper functionality.

4. Is it safe to drive my Lexus with OBDII code B19A5 present?

For safety reasons, it is recommended to address the underlying issue causing the OBDII code B19A5 as soon as possible before driving the vehicle, as it may affect the proper functioning of the airbag system in the event of a collision.

5. Can I repair OBDII code B19A5 in my Lexus myself?

While diagnosing and repairing this code may require specialized knowledge and tools, experienced DIYers with automotive repair skills may be able to address the issue by inspecting the wiring, connectors, and front active headrest squib LH unit for faults and making necessary repairs or replacements.

6. How much does it typically cost to repair OBDII code B19A5 in a Lexus?

The cost of repairing OBDII code B19A5 can vary depending on the root cause of the issue, the labor rates of the repair shop, and the cost of any replacement parts needed. It is advisable to obtain quotes from reputable automotive repair shops for an accurate estimate.

7. Will resetting the OBDII code B19A5 make it go away permanently?

Simply resetting the OBDII code B19A5 without addressing the underlying issue will not make it go away permanently. The root cause of the problem needs to be diagnosed and repaired to ensure the code does not reappear.

8. Can OBDII code B19A5 affect the overall safety of my Lexus?

Yes, OBDII code B19A5 can affect the overall safety of your Lexus, particularly in the functioning of the airbag system. It is crucial to address this code promptly to maintain the safety features of the vehicle.

9. Are there any preventive measures to avoid OBDII code B19A5 in a Lexus?

Regular maintenance checks, including inspections of the airbag system components, such as the front active headrest squib LH circuit, can help in identifying potential issues early and prevent OBDII code B19A5 from occurring.

10. Can a professional automotive technician help me with OBDII code B19A5 in my Lexus?

Yes, seeking assistance from a professional automotive technician or a certified Lexus service center is advisable for diagnosing and repairing OBDII code B19A5, as they have the expertise and equipment required to address airbag system issues effectively.