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Engine-Codes – Generic – B004B

B004B Code - Third Row Right Frontal Stage 3 Deployment Control

Quick Answer

The B004B diagnostic trouble code (DTC) refers to an issue with the Third Row Right Frontal Stage 3 Deployment Control in the vehicle's airbag system. Common causes include Faulty Third Row Right Frontal Stage 3 Deployment Control module, Wiring or electrical connection issues in the airbag system, Impact or damage to the third-row right frontal airbag sensor. 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
B004B indicates Third Row Right Frontal Stage 3 Deployment Control.
Common causes
Common causes include Faulty Third Row Right Frontal Stage 3 Deployment Control module, Wiring or electrical connection issues in the airbag system, Impact or damage to the third-row right frontal airbag sensor.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 20, 2024
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Code B004B Description

The B004B diagnostic trouble code (DTC) refers to an issue with the Third Row Right Frontal Stage 3 Deployment Control in the vehicle's airbag system. This code indicates a problem with the deployment control for the frontal airbag in the third-row right seating position. The airbag system in modern vehicles is designed to deploy in the event of a collision to provide additional protection to occupants. The Stage 3 deployment control is a crucial component that ensures the airbag deploys at the correct time and with the appropriate force to protect the occupant.

OBDII Code B004B - Third Row Right Frontal Stage 3 Deployment Control
B004B Code - Third Row Right Frontal Stage 3 Deployment Control

Common Causes of B004B

  1. Faulty Third Row Right Frontal Stage 3 Deployment Control module.
  2. Wiring or electrical connection issues in the airbag system.
  3. Impact or damage to the third-row right frontal airbag sensor.
  4. Software or programming issues in the airbag control module.
  5. General wear and tear on the airbag system components.

Symptoms of B004B

  1. Illumination of the airbag warning light on the dashboard.
  2. Diagnostic trouble code (DTC) stored in the vehicle's computer system.
  3. Inability to reset the airbag system after attempting to clear the code.
  4. Intermittent or non-deployment of the third-row right frontal airbag during testing.

How to Fix B004B

  1. Begin by diagnosing the specific cause of the B004B code using a professional diagnostic scan tool.
  2. Inspect the wiring and electrical connections in the airbag system for any damage or corrosion.
  3. Test the third-row right frontal airbag sensor for proper functionality and replace if necessary.
  4. Replace the Third Row Right Frontal Stage 3 Deployment Control module if it is found to be faulty.
  5. Clear the diagnostic trouble code from the vehicle's computer system and perform a thorough test of the airbag system to ensure proper deployment.

Cost to Fix B004B

The cost of repairing the Third Row Right Frontal Stage 3 Deployment Control issue can vary depending on the specific cause of the problem and the vehicle's make and model. In general, the parts and labor for this repair could range from $200 to $500. It's important to note that diagnostic time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate. Additionally, rates may be higher at dealerships or in metropolitan areas, while independent shops may offer more affordable pricing.

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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.

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