AutoCodes – Generic – B001A:04

B001A:04 Code - Driver 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 Driver Seat Belt Anchor Pretensioner, Driver Seat Belt Anchor Pretensioner harness is open or shorted, Driver 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: B001A:04 indicates Driver Seat Belt Anchor Pretensioner Deployment Loop Open.
Common causes: Common causes include Faulty Driver Seat Belt Anchor Pretensioner, Driver Seat Belt Anchor Pretensioner harness is open or shorted, Driver 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 955

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 Oct 05, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B001A: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 B001A:04 - Driver Seat Belt Anchor Pretensioner Deployment Loop Open - AutoCodes.com — B001A:04 Code - Driver Seat Belt Anchor Pretensioner Deployment Loop Open

What does this mean?

What are the Possible Causes of the DTC B001A:04?

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

How to Fix the DTC B001A: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

B001A:01 Driver Seat Belt Anchor Pretensioner Deployment Loop Short to Battery
B001A:02 Driver Seat Belt Anchor Pretensioner Deployment Loop Short to Ground
B001A:04 Driver Seat Belt Anchor Pretensioner Deployment Loop Open
B001A:0D Driver Seat Belt Anchor Pretensioner Deployment Loop High Resistance
B001A:0E Driver Seat Belt Anchor Pretensioner Deployment Loop Low Resistance

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B001A: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 B001A:04 code?

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Need Help with the Code?

Get the B001A: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 B001A:04 Code

1. What are the common symptoms of OBDII code B001A:04 (Driver Seat Belt Anchor Pretensioner Deployment Loop Open)?

The common symptoms include the airbag warning light illuminating on the dashboard and a potential message indicating a problem with the driver seat belt pretensioner system.

2. What does the OBDII code B001A:04 indicate about the driver seat belt anchor pretensioner deployment loop?

This code indicates that there is an open circuit detected in the driver seat belt anchor pretensioner deployment loop, meaning that the system may not deploy properly in the event of a collision.

3. What are the possible causes of OBDII code B001A:04 (Driver Seat Belt Anchor Pretensioner Deployment Loop Open)?

Possible causes include a faulty seat belt pretensioner, damaged wiring or connectors in the pretensioner system, or a malfunctioning control module.

4. How can I diagnose the issue related to OBDII code B001A:04?

To diagnose the issue, a professional diagnostic scan tool is typically needed to retrieve the specific fault codes. Additionally, a visual inspection of the seat belt pretensioner system and associated wiring may help identify any obvious issues.

5. What are the potential risks of driving with the OBDII code B001A:04 active?

Driving with this code active may pose a risk in the event of a collision, as the driver seat belt pretensioner system may not function as intended, potentially compromising the safety of the occupant.

6. Can I repair OBDII code B001A:04 (Driver Seat Belt Anchor Pretensioner Deployment Loop Open) myself?

Repairing this issue may require specialized knowledge and tools, so it is recommended to have the problem diagnosed and repaired by a qualified automotive technician to ensure proper and safe resolution.

7. How much does it typically cost to repair OBDII code B001A:04?

The cost of repairing this code can vary depending on the specific cause of the issue, but it may involve replacing the seat belt pretensioner, repairing damaged wiring, or addressing issues with the control module. Costs can range from a few hundred to over a thousand dollars.

8. Can resetting the OBDII system clear the B001A:04 code?

Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing the code is not addressed, it is likely to reappear. It is important to diagnose and repair the problem to ensure the safety systems are functioning properly.

9. How long does it take to repair OBDII code B001A:04?

The repair time can vary depending on the specific cause of the issue and the complexity of the repair needed. It may take anywhere from a few hours to a full day to diagnose and repair the problem related to this OBDII code.

10. Is it safe to continue driving my vehicle with the OBDII code B001A:04 unresolved?

It is not recommended to continue driving the vehicle with this code unresolved, as it may compromise the effectiveness of the driver seat belt pretensioner system in the event of a collision. It is best to have the issue addressed promptly by a qualified technician.