AutoCodes – Generic – B001B:04

B001B:04 Code - Passenger Seat Belt Anchor Pretensioner Deployment Loop Open

Quick Answer

The seat belt pretensioner (driver and passenger) consists of a housing, seat belt retractor (located in the B-pillar), seat belt anchor (located in the seat), seat belt webbing, an initiator, and a canister of gas-generating materials. Common causes include Faulty Passenger Seat Belt Anchor Pretensioner, Passenger Seat Belt Anchor Pretensioner harness is open or shorted, Passenger Seat Belt Anchor Pretensioner 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: B001B:04 indicates Passenger Seat Belt Anchor Pretensioner Deployment Loop Open.
Common causes: Common causes include Faulty Passenger Seat Belt Anchor Pretensioner, Passenger Seat Belt Anchor Pretensioner harness is open or shorted, Passenger Seat Belt Anchor Pretensioner 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 1,319

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Oct 05, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B001B:04 Description

The seat belt pretensioner (driver and passenger) consists of a housing, seat belt retractor (located in the B-pillar), seat belt anchor (located in the seat), seat belt webbing, an initiator, and a canister of gas-generating materials. The initiator is part of the seat belt pretensioner deployment loop. When the vehicle is involved in a collision of sufficient force, the Inflatable Restraint Sensing and Diagnostic Module (SDM) causes current to flow through the seat belt deployment loops to the initiator. Current passing through the initiator ignites the material in the canister producing a rapid generation of gas. The gas produced from this reaction deploys the seat belt pretensioners which removes all of the slack in the seat belts. Depending on the severity of the collision, the seat belt pretensioners may deploy without the frontal air bags deploying, or they will deploy immediately before the frontal air bags deploy. A shorting bar (if equipped) is located in the connector. The Diagnostic Trouble Code (DTC) will be set if the pretensioner control circuit is open for 2 s.

OBDII Code B001B:04 - Passenger Seat Belt Anchor Pretensioner Deployment Loop Open - AutoCodes.com — B001B:04 Code - Passenger Seat Belt Anchor Pretensioner Deployment Loop Open

What does this mean?

What are the Possible Causes of the DTC B001B:04?

Faulty Passenger Seat Belt Anchor Pretensioner
Passenger Seat Belt Anchor Pretensioner harness is open or shorted
Passenger Seat Belt Anchor Pretensioner circuit poor electrical connection
Faulty Sensing and Diagnostic Module (SDM)

How to Fix the DTC B001B:04?

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 does this mean?

Code Tech Notes

B001B:01 Passenger Seat Belt Anchor Pretensioner Deployment Loop Short to Battery
B001B:02 Passenger Seat Belt Anchor Pretensioner Deployment Loop Short to Ground
B001B:04 Passenger Seat Belt Anchor Pretensioner Deployment Loop Open
B001B:0D Passenger Seat Belt Anchor Pretensioner Deployment Loop High Resistance
B001B:0E Passenger Seat Belt Anchor Pretensioner Deployment Loop Low Resistance

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B001B:04 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 B001B:04 code?

Need more information on how to fix the B001B:04 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B001B:04 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 B001B:04 Code

1. What are the common symptoms of OBDII code B001B:04?

The common symptoms of this code include the airbag warning light illuminating on the dashboard and a potential message indicating an issue with the passenger seat belt pretensioner.

2. What does the OBDII code B001B:04 indicate?

OBDII code B001B:04 indicates that there is an open circuit in the deployment loop of the passenger seat belt anchor pretensioner.

3. What are the possible causes of OBDII code B001B:04?

The possible causes of this code include a faulty seat belt pretensioner, damaged wiring, poor connections, or a defective airbag control module.

4. How can I diagnose the issue related to OBDII code B001B:04?

To diagnose the problem, you may need to perform a visual inspection of the seat belt pretensioner and its wiring, check for loose connections, and use an OBDII scanner to retrieve and analyze the fault codes.

5. Is it safe to drive with OBDII code B001B:04 present?

It is not recommended to drive with this code present, as it indicates a potential issue with the passenger seat belt pretensioner, which is a crucial safety component in the event of a collision.

6. Can I reset OBDII code B001B:04 without fixing the underlying issue?

Simply resetting the code without addressing the underlying problem will not resolve the issue. It is important to diagnose and repair the cause of the code to ensure the safety systems function properly.

7. How can I repair OBDII code B001B:04?

Repairing this code may involve replacing the faulty seat belt pretensioner, repairing damaged wiring or connectors, or resetting the airbag control module after the issue has been resolved.

8. Do I need special tools to fix OBDII code B001B:04?

Depending on the exact cause of the code, you may need basic hand tools, a multimeter for testing circuits, and potentially an OBDII scanner to reset the code after repairs have been completed.

9. Is it possible to fix OBDII code B001B:04 at home, or should I take it to a professional mechanic?

While some DIY enthusiasts may be able to diagnose and repair this code at home, it is recommended to seek the assistance of a professional mechanic, especially when dealing with safety-related systems like airbags and seat belts.

10. What are the potential risks of ignoring OBDII code B001B:04?

Ignoring this code could result in the passenger seat belt pretensioner not deploying properly in the event of a collision, potentially leading to increased risk of injury for the occupant.