What is Trouble Code B0059?
Trouble Code B0059 – Front Passenger Seat Belt Pretensioner Deployment Voltage Out of Range
Code B0059 indicates that the voltage in the front passenger seat belt pretensioner circuit is higher or lower than the permissible level. This may be due to a short circuit, an open circuit, or a fault in the pretensioner itself.
Trouble code B0059 refers to the vehicle’s passive safety system, specifically the front passenger seat belt pretensioner circuit. This error indicates that the voltage in the pretensioner circuit is out of range, which could lead to a malfunction of the safety system during an accident.
The seat belt pretensioner system is designed to rapidly tighten the seat belt upon impact, holding the occupant more securely to the seat and reducing injury risk. If this system fails to operate correctly, the effectiveness of the seat belt may be reduced, posing a risk to passenger safety.
Symptoms of Trouble Code B0059
Signs of this error may include:
- Airbag warning light illuminated on the instrument panel
- The airbag system may be deactivated
- Error stored in the control unit’s memory
- Possible issues with the front passenger seat belt
Main Causes of Trouble Code B0059
- Short circuit or open circuit in the pretensioner wiring
- Faulty seat belt pretensioner itself
- Damage or corrosion to connectors and contacts
- Problem with the safety control unit
How to Diagnose Trouble Code B0059?
- Connect an OBD2 scanner to the vehicle’s diagnostic connector and read the trouble codes.
- Check the wiring and connectors of the front passenger seat belt pretensioner circuit for damage or corrosion.
- Test the pretensioner using appropriate diagnostic equipment.
- Check the safety control unit for other errors and ensure it is functioning correctly.
- Once the identified fault is resolved, reset the trouble code using a diagnostic scanner and check if it reappears.
Possible Causes and Diagnostic Methods
Possible Cause | How to Check? |
|---|---|
Short circuit or open circuit | Check wiring integrity and for the presence of shorts with a multimeter |
Faulty seat belt pretensioner | Test the pretensioner using diagnostic equipment |
Damage or corrosion to connectors/contacts | Visual inspection of connectors, cleaning and treating contact surfaces |
Safety control unit problem | Read error codes, check control unit operation with a diagnostic scanner |
Tools Needed: OBD2 diagnostic scanner, multimeter, wiring tool kit, contact cleaner
How to Fix Trouble Code B0059?
Simple Fixes
- Clean and treat connector contact surfaces
- Inspect and repair damaged wiring
- Reset the trouble code after troubleshooting the fault
In-Depth Diagnosis and Repair Solutions
- Replace the front passenger seat belt pretensioner
- Repair or replacement of the safety system control unit
- Check and replace other safety components if necessary
Solving Problems by Symptom
Symptom | Possible Solution |
|---|---|
Airbag warning light is on | Inspect and troubleshoot the safety system |
Error persists after reset | Perform in-depth diagnosis and replace faulty parts |
Seat belt issues | Inspect and replace the belt pretensioner if needed |
Trouble Code B0059 in Common Vehicles
This error is common in vehicles from the General Motors brand, such as Chevrolet, GMC, Cadillac, as well as some models from Saab and other manufacturers.
- B0059 in Chevrolet: In Chevrolet models like Silverado and Malibu, error B0059 can occur due to issues with the wiring or connectors of the front passenger seat belt pretensioner.
- B0059 in GMC: In GMC models, such as Sierra and Acadia, this error is often related to a pretensioner failure or wiring damage.
- B0059 in Cadillac: In Cadillac models like CTS and Escalade, error B0059 may be caused by a faulty safety system control unit or seat belt pretensioner.
- B0059 in Saab: In some Saab models, such as the 9-5, the B0059 error can occur due to a pretensioner fault or wiring problems.
- B0059 in Opel: In Opel models like Astra and Insignia, this error might result from damaged connectors or wiring for the seat belt pretensioner.
B0059 Frequently Asked Questions
What to do if you encounter trouble code B0059?
Trouble code B0059 indicates a problem in the front passenger seat belt pretensioner deployment circuit. To resolve the error, you need to diagnose the safety system, check the wiring and connectors, and replace any defective components.
Is it possible to drive with error B0059?
It is not recommended, as the error relates to the passive safety system and the seat belt pretensioner may not function properly in the event of an accident.
Is error B0059 dangerous for the driver and passengers?
Yes, in the event of an accident, the seat belt system may not provide adequate protection for the front passenger.
Can error B0059 be reset without fixing it?
The error can be temporarily reset using a scanner or by disconnecting the battery, but it will reappear if the cause is not addressed.
Is error B0059 related to the airbags?
Yes, as the seat belt pretensioner is part of the SRS system, the error can affect airbag deployment.
What should I do if error B0059 reappears after resetting?
A comprehensive safety system diagnosis is necessary, checking connectors, wiring, and replacing the faulty component.
B0059 Related OBD2 Errors
- B0057 – Front Passenger Seat Belt Pretensioner Deployment Resistance Below Normal
- B0058 – Front Passenger Seat Belt Pretensioner Deployment Circuit Open
- B0065 – Driver Seat Belt Pretensioner Deployment Voltage Out of Range
Important! Ignoring this error may lead to the safety system failing to operate normally during an accident, increasing the risk of injury to passengers.