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Code B0057

Symptoms

• Airbag warning light illuminated

• Seat belt warning light on

• Safety system malfunction message

Common Causes

• Faulty seat belt sensor

• Damaged wiring or connectors

• Faulty seat belt latch

Glossary

OBD-II: On-Board Diagnostics, a standardized system for self-diagnostics and reporting in vehicles.

Sensor: A device that detects or measures a physical property and records, indicates, or otherwise responds to it.

Related Codes

• B0056

• B0058

Laymans terms

This code means there's a problem with the sensor that checks if the middle seat belt in the third row of seats is working properly.

Explanation

The B0057 code is triggered when the vehicle's computer detects an issue with the sensor responsible for monitoring the third row center seat belt.

Technical description

The B0057 code indicates a malfunction in the third row center seat belt sensor circuit. This sensor is part of the vehicle's safety system and ensures that the seat belt is properly latched and functioning. If the sensor detects an anomaly, it sends a signal to the vehicle's control module, which then triggers the B0057 code.

Diagnosis steps

• Use an OBD-II scanner to confirm the B0057 code.

• Inspect the third row center seat belt and sensor for visible damage.

• Check the wiring and connectors for continuity and damage.

Repair procedures

• Replace the faulty seat belt sensor.

• Repair or replace damaged wiring or connectors.

• Ensure the seat belt latch is functioning properly.

Tools required

• OBD-II scanner

• Multimeter

• Basic hand tools

Estimated repair cost

$150 - $300

Difficulty level

Moderate

Commonly affected vehicles

• Chevrolet Suburban

• GMC Yukon

• Cadillac Escalade

Preventive measures

• Regularly inspect seat belts for wear and tear.

• Ensure sensors are clean and free of debris.

• Check wiring connections periodically.

Error code type

Sensor Issue

User experience recommendations

• Do not ignore the warning light; it affects safety systems.

• Have a professional inspect the seat belt system if unsure.

• Ensure all passengers use seat belts properly.

Warranty information

Check with the vehicle manufacturer for specific warranty coverage on safety components.

Historical data

This code has been more common in vehicles with advanced safety systems that include multiple seat belt sensors.

Urgency level

High – This code affects the vehicle's safety systems and should be addressed promptly.

Legal and safety notice

Driving with malfunctioning safety systems may not comply with safety regulations and could increase the risk of injury in an accident.

Testing conditions

• Vehicle parked and engine off

• Access to the third row seating area

Component location

The third row center seat belt sensor is located in the rear seating area, typically integrated into the seat belt latch or buckle.

FAQs

Q: Can I drive with a B0057 code?
A: It's not recommended to drive with this code active as it affects the vehicle's safety systems.

Q: Will the airbags still work if this code is present?
A: The presence of this code may affect the airbag system's functionality, so it's important to address it promptly.

Last updated: Jun 9, 2026 • Source: internal database
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