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Engine-Codes – Generic – B0059

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

Quick Answer

The B0059 diagnostic trouble code (DTC) indicates that the voltage in the right front passenger pretensioner deployment loop is not within the expected range. Common causes include Wiring harness damage or corrosion, Faulty pretensioner in the right front passenger seat, Issues with the airbag control module. 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 Wiring harness damage or corrosion, Faulty pretensioner in the right front passenger seat, Issues with the airbag control module.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 15, 2024
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Code B0059 Description

The B0059 diagnostic trouble code (DTC) indicates that the voltage in the right front passenger pretensioner deployment loop is not within the expected range. The pretensioner is a safety feature in modern vehicles that tightens the seatbelt in the event of a collision, helping to restrain the occupant and reduce the risk of injury. The deployment loop is the circuit that controls the pretensioner's activation.

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

Common Causes of B0059

  1. Wiring harness damage or corrosion.
  2. Faulty pretensioner in the right front passenger seat.
  3. Issues with the airbag control module.
  4. Loose connections in the deployment loop circuit.
  5. Electrical problems in the vehicle's system.

Symptoms of B0059

  1. Illumination of the airbag warning light on the dashboard.
  2. Audible chime indicating a problem with the airbag system.
  3. Inability of the seatbelt to tighten during sudden braking or acceleration.
  4. Diagnostic trouble code B0059 stored in the vehicle's computer system.

How to Fix B0059

  1. Begin by diagnosing the exact cause of the voltage discrepancy using a scan tool to retrieve the DTCs stored in the vehicle's computer system.
  2. Inspect the wiring harness for any damage, corrosion, or loose connections. Repair or replace any faulty wiring as needed.
  3. Check the pretensioner in the right front passenger seat for proper functioning. Replace the pretensioner if it is found to be faulty.
  4. Inspect the airbag control module for any issues. Replace the module if necessary.
  5. Clear the DTCs from the vehicle's computer system after completing the repairs and perform a test drive to ensure that the issue has been resolved.

Cost to Fix B0059

The typical repair costs for addressing a B0059 DTC can vary depending on the specific cause of the issue. In general, the cost of parts for replacing a faulty pretensioner or airbag control module can range from $200 to $500 or more. Labor costs can add an additional $100 to $300 or more, depending on the shop's hourly rates and the complexity of the repair.

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Code B0059 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?

It’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.

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