AutoCodes – Generic – B001A

B001A Code - Driver Seat Belt Anchor Pretensioner Deployment Loop

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 indicates Driver Seat Belt Anchor Pretensioner Deployment Loop.
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 17,568

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 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.

OBDII Code B001A - Driver Seat Belt Anchor Pretensioner Deployment Loop - AutoCodes.com — B001A Code - Driver Seat Belt Anchor Pretensioner Deployment Loop

What does this mean?

What are the Possible Causes of the DTC B001A?

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?

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 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 code?

Need more information on how to fix the B001A code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B001A code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B001A Buick — Driver Seat Belt Anchor Pretensioner Deployment Loop
B001A Cadillac — Driver Seat Belt Anchor Pretensioner Deployment Loop
B001A Chevrolet — Driver Seat Belt Anchor Pretensioner Deployment Loop
B001A GMC — Driver Seat Belt Anchor Pretensioner Deployment Loop

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 Code

What does the OBDII code B001A indicate?

The OBDII code B001A indicates a problem with the driver seat belt anchor pretensioner deployment loop, which is responsible for tightening the seat belt in the event of a collision.

What are common symptoms of the B001A code?

Common symptoms include the illumination of the airbag warning light on the dashboard and, in some cases, the malfunctioning of the seat belt pretensioner system.

What causes the B001A code to trigger?

The B001A code can be triggered by issues such as a faulty pretensioner, damaged wiring, poor connections, or a malfunctioning airbag control module.

How can I diagnose the B001A code?

To diagnose the B001A code, use an OBDII scanner to read the code and any related codes, visually inspect the seat belt pretensioner and wiring, and perform a continuity test on the associated circuits.

Can I drive my vehicle with the B001A code active?

While it may be possible to drive the vehicle, it is not recommended as the airbag and seat belt systems may not function properly in the event of an accident, compromising safety.

What are the repair options for the B001A code?

Repair options include replacing the faulty seat belt pretensioner, repairing damaged wiring or connectors, or replacing the airbag control module if it is found to be defective.

Is it safe to reset the B001A code without repairs?

Resetting the B001A code without addressing the underlying issue is not safe, as the airbag system may still be compromised, leaving you vulnerable in a crash.

How much does it typically cost to fix the B001A code?

The cost to fix the B001A code can vary widely depending on the specific issue, ranging from a simple wiring repair for $100 to $500 or more for a complete seat belt pretensioner replacement.

Will the B001A code affect my vehicle's inspection?

Yes, the B001A code may affect your vehicle's inspection, as many jurisdictions require all airbag and safety-related systems to be functional for a passing grade.