AutoCodes – Lexus – B19A3 Lexus

B19A3 Lexus Code - Short To Positive In Front Active Headrest Squib RH Circuit

Quick Answer

The Front Active Headrest Squib Right (RH) Circuit consists of the Center Airbag Sensor Assembly and the Active Headrest Inflator RH. Common causes include Faulty Active Headrest Inflator Assembly Right (RH) (Front Active Headrest Squib RH), Active Headrest Inflator Assembly Right (RH) harness is open or shorted, Active Headrest Inflator Assembly Right (RH) 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: B19A3 Lexus indicates Short To Positive In Front Active Headrest Squib RH Circuit.
Common causes: Common causes include Faulty Active Headrest Inflator Assembly Right (RH) (Front Active Headrest Squib RH), Active Headrest Inflator Assembly Right (RH) harness is open or shorted, Active Headrest Inflator Assembly Right (RH) 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 524

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 B19A3 Lexus Description

The Front Active Headrest Squib Right (RH) Circuit consists of the Center Airbag Sensor Assembly and the Active Headrest Inflator RH. 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 RH Circuit.

OBDII Code B19A3 Lexus - Short To Positive In Front Active Headrest Squib RH Circuit - AutoCodes.com — B19A3 Lexus Code - Short To Positive In Front Active Headrest Squib RH Circuit

What does this mean?

What are the Possible Causes of the DTC B19A3 Lexus?

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

How to Fix the DTC B19A3 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 B19A3 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 B19A3 Lexus code?

Need more information on how to fix the B19A3 Lexus code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B19A3 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 B19A3 Lexus Code

1. What are the common symptoms of OBDII code B19A3 in a Lexus related to a short to positive in the front active headrest squib RH circuit?

When this code is present, you may experience issues with the front active headrest system, including failure to deploy in the event of a collision.

2. What can cause the OBDII code B19A3 in a Lexus?

This code typically indicates a short to positive in the front active headrest squib RH circuit, which can be caused by damaged wiring, a faulty squib (igniter), or a malfunctioning control module.

3. How serious is OBDII code B19A3 in a Lexus?

While this code may not affect the overall drivability of the vehicle, it can compromise the effectiveness of the front active headrest system in the event of an accident, potentially increasing the risk of injury.

4. How can I diagnose OBDII code B19A3 in a Lexus?

Diagnosing this code usually involves inspecting the wiring harness, connectors, and components related to the front active headrest squib RH circuit, as well as using a scan tool to retrieve specific fault codes.

5. Can I repair OBDII code B19A3 in a Lexus myself?

Repairing this code may require advanced diagnostic tools and knowledge of automotive electrical systems, so it is recommended to seek assistance from a qualified mechanic or technician.

6. Is it safe to drive with OBDII code B19A3 present in a Lexus?

While the vehicle should still be operable with this code, it is advisable to address the issue promptly to ensure the proper functioning of the front active headrest system in case of an emergency.

7. How much does it cost to repair OBDII code B19A3 in a Lexus?

The cost of repairing this code can vary depending on the underlying cause of the issue, the extent of the damage, and the labor rates of the repair facility.

8. Can resetting the OBDII code B19A3 in a Lexus make it go away permanently?

Simply resetting the code may temporarily clear the warning light, but if the underlying issue is not addressed, the code is likely to reappear once the fault is detected again.

9. Are there any preventative measures to avoid OBDII code B19A3 in a Lexus?

Regular maintenance and inspection of the vehicle's electrical system, including the front active headrest components, can help prevent issues that may trigger this fault code.

10. What are the potential risks of ignoring OBDII code B19A3 in a Lexus?

Ignoring this code could result in the front active headrest system not functioning properly during a collision, potentially increasing the risk of injury to the occupants of the vehicle.