AutoCodes – Generic – B0059

B0059 Code - Right Front/Passenger Pretensioner Deployment Loop Voltage Out of Range

Quick Answer

The passenger seat belt pretensioner deployment loop consists of a seat belt pretensioner - RF and the seat belt pretensioner - RF high and low circuits. Common causes include Faulty Right Front/Passenger Pretensioner, Right Front/Passenger Pretensioner harness is open or shorted, Right Front/Passenger 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: B0059 indicates Right Front/Passenger Pretensioner Deployment Loop Voltage Out of Range.
Common causes: Common causes include Faulty Right Front/Passenger Pretensioner, Right Front/Passenger Pretensioner harness is open or shorted, Right Front/Passenger 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 5,035

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 B0059 Description

The passenger seat belt pretensioner deployment loop consists of a seat belt pretensioner - RF and the seat belt pretensioner - RF 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 B0059 - Right Front/Passenger Pretensioner Deployment Loop Voltage Out of Range - AutoCodes.com — B0059 Code - Right Front/Passenger Pretensioner Deployment Loop Voltage Out of Range

What does this mean?

What are the Possible Causes of the DTC B0059?

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

How to Fix the DTC B0059?

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 B0059 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 B0059 code?

Need more information on how to fix the B0059 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0059 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B0059 Buick — Right Front/Passenger Pretensioner Deployment Loop Voltage Out of Range
B0059 Cadillac — Right Front/Passenger Pretensioner Deployment Loop Voltage Out of Range
B0059 Chevrolet — Right Front/Passenger Pretensioner Deployment Loop Voltage Out of Range
B0059 GMC — Right Front/Passenger Pretensioner Deployment Loop Voltage Out of Range

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 B0059 Code

1. What does the OBDII code B0059 mean?

The B0059 code indicates an issue with the right front/passenger seat belt pretensioner deployment loop, specifically that its voltage is out of the expected range.

2. What are the common symptoms of code B0059?

Common symptoms include the airbag warning light being illuminated, potential deactivation of the airbag system, and the passenger seat belt pretensioner not functioning properly in an accident.

3. What causes the B0059 code?

The most common causes include a faulty pretensioner, damaged wiring or connectors in the pretensioner circuit, corroded terminals, or an issue with the airbag control module.

4. How serious is the B0059 code?

This code is serious because it affects the safety system of the vehicle, potentially leading to the seat belt pretensioner or airbag not deploying correctly during an accident.

5. Can I drive with the B0059 code active?

Itâ€™s not recommended to drive with this code active, as it indicates a fault in a critical safety system, which could compromise protection in a crash.

6. How is the B0059 code diagnosed?

A technician will use a scan tool to verify the code, inspect the pretensioner wiring and connectors for damage, and test the pretensioner and airbag control module for proper function.

7. How do you fix the B0059 code?

Repairs might include replacing the seat belt pretensioner, repairing or replacing damaged wiring, cleaning corroded connectors, or reprogramming or replacing the airbag control module.

8. Can a dead battery cause the B0059 code?

A dead or weak battery could potentially contribute to the code if it causes voltage fluctuations, but this is less common compared to other electrical issues.

9. What tools are needed to repair the B0059 code?

Tools typically include a scan tool, a multimeter for testing voltage and resistance, and possibly replacement wiring, connectors, or the pretensioner itself.

10. Does the B0059 code require recalibrating the airbag system?

In some cases, after repairs are made, the airbag control module may need to be reset or recalibrated to clear the code and restore system functionality.