AutoCodes – Generic – B0064

B0064 Code - Left Front/Driver Pretensioner Deployment Loop Resistance Low

Quick Answer

The driver seat belt pretensioner deployment loop consists of a seat belt pretensioner - LF and the seat belt pretensioner - LF high and low circuits. Common causes include Faulty Left Front/Driver Pretensioner, Left Front/Driver Pretensioner harness is open or shorted, Left Front/Driver 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: B0064 indicates Left Front/Driver Pretensioner Deployment Loop Resistance Low.
Common causes: Common causes include Faulty Left Front/Driver Pretensioner, Left Front/Driver Pretensioner harness is open or shorted, Left Front/Driver 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 5,040

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 Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B0064 Description

The driver seat belt pretensioner deployment loop consists of a seat belt pretensioner - LF and the seat belt pretensioner - LF high and low circuits. A shorting bar used within the seat belt pretensioner connector shorts together both the seat belt pretensioner high and low circuits when the connector is disconnected. This will help to prevent unwanted deployment of the pretensioner during servicing. During a frontal crash of sufficient force the inflatable restraint Sensing and Diagnostic Module (SDM) will allow current to flow through the deployment loop in order to deploy the seat belt pretensioner. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity and for shorts to ground or voltage. If a malfunction is detected, a Diagnostic Trouble Code (DTC) will be stored in memory.

OBDII Code B0064 - Left Front/Driver Pretensioner Deployment Loop Resistance Low - AutoCodes.com — B0064 Code - Left Front/Driver Pretensioner Deployment Loop Resistance Low

What does this mean?

What are the Possible Causes of the DTC B0064?

Faulty Left Front/Driver Pretensioner
Left Front/Driver Pretensioner harness is open or shorted
Left Front/Driver Pretensioner circuit poor electrical connection
Faulty Sensing and Diagnostic Module (SDM)

How to Fix the DTC B0064?

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 B0064 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 B0064 code?

Need more information on how to fix the B0064 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0064 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B0064 Buick — Left Front/Driver Pretensioner Deployment Loop Resistance Low
B0064 Cadillac — Left Front/Driver Pretensioner Deployment Loop Resistance Low
B0064 Chevrolet — Left Front/Driver Pretensioner Deployment Loop Resistance Low
B0064 GMC — Left Front/Driver Pretensioner Deployment Loop Resistance Low

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 B0064 Code

1. What are the common symptoms of OBDII code B0064?

- Common symptoms include the airbag warning light illuminating on the dashboard and the airbag system potentially not deploying properly in the event of a collision.

2. What can cause the OBDII code B0064 to trigger?

- The code B0064 is usually triggered by a low resistance in the left front/driver pretensioner deployment loop, which may be caused by damaged wiring, a faulty connector, or a problem with the pretensioner itself.

3. How serious is the OBDII code B0064?

- The OBDII code B0064 indicates a potential issue with the driver's side pretensioner deployment loop, which is a crucial component of the airbag system. It is important to address this issue promptly to ensure the airbag system functions correctly in the event of an accident.

4. Can I continue driving with OBDII code B0064 present?

- It is not recommended to continue driving with the OBDII code B0064 present, as it indicates a fault in the airbag system that may compromise safety in the event of a collision.

5. How can I diagnose and repair OBDII code B0064?

- Diagnosing and repairing OBDII code B0064 typically involves inspecting the wiring, connectors, and pretensioner in the left front/driver side of the vehicle. Repair may involve replacing damaged components or repairing wiring issues.

6. Are there any DIY tips for fixing OBDII code B0064?

- While diagnosing and repairing OBDII code B0064 may require specialized knowledge and tools, basic troubleshooting steps such as checking for loose connections or damaged wiring can be done by DIY enthusiasts. However, for a thorough repair, it is recommended to consult a professional mechanic.

7. How much does it cost to fix OBDII code B0064?

- The cost of fixing OBDII code B0064 can vary depending on the underlying cause of the issue, the vehicle make and model, and labor rates in your area. It is advisable to obtain quotes from auto repair shops for an accurate estimate.

8. Can clearing the OBDII code B0064 resolve the issue?

- Clearing the OBDII code B0064 may temporarily turn off the warning light, but it will not fix the underlying problem causing the low resistance in the left front/driver pretensioner deployment loop. It is important to diagnose and address the root cause of the issue.

9. Will OBDII code B0064 affect my vehicle's performance?

- OBDII code B0064 is related to the airbag system and should not directly affect the performance of the vehicle. However, it is crucial for safety reasons to address the issue promptly to ensure the proper functionality of the airbag system.

10. How often does OBDII code B0064 occur in vehicles?

- The occurrence of OBDII code B0064 can vary among vehicles, but it is a relatively common issue in vehicles equipped with airbag systems. Regular maintenance and inspections can help prevent and address such codes promptly.