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Code B0053

Symptoms

• Seat belt warning light on

• Audible seat belt warning chime

• Airbag system warning light

Common Causes

• Faulty seat belt sensor

• Damaged wiring or connectors

• Faulty control module

Glossary

OBD-II: On-Board Diagnostics, a standardized system for vehicle self-diagnostics.

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

Related Codes

• B0054

• B0055

Laymans terms

This code means there's a problem with the sensor that checks if the seat belt is buckled in the second row on the left side of the car.

Explanation

The B0053 code indicates an issue with the seat belt sensor located on the left side of the second row of seats. This sensor is responsible for detecting whether the seat belt is fastened.

Technical description

The B0053 code is set when the vehicle's control module detects a malfunction in the second row left seat belt sensor. This sensor is part of the vehicle's safety system and ensures that the seat belt is properly engaged. A fault in this sensor could lead to incorrect information being sent to the vehicle's safety system, potentially affecting airbag deployment and other safety features.

Diagnosis steps

• Inspect the seat belt sensor and its wiring for damage.

• Check the connectors for corrosion or disconnection.

• Use a diagnostic scanner to verify the code and clear it to see if it returns.

Repair procedures

• Replace the faulty seat belt sensor.

• Repair or replace damaged wiring or connectors.

• Reset the vehicle's control module.

Tools required

• OBD-II scanner

• Multimeter

• Screwdriver set

Estimated repair cost

$100 - $300

Difficulty level

Moderate

Commonly affected vehicles

• Chevrolet Tahoe

• GMC Yukon

• Cadillac Escalade

Preventive measures

• Regularly inspect seat belts and sensors.

• Avoid spilling liquids near seat belt buckles.

• Ensure seat belts are not twisted or jammed.

Error code type

Sensor Issue

User experience recommendations

• Have the vehicle inspected by a professional if the seat belt warning light is on.

• Avoid using the affected seat until the issue is resolved.

Warranty information

Check with the vehicle manufacturer for warranty coverage on seat belt components.

Historical data

This code has been associated with seat belt sensor issues in various vehicle models, often due to wear and tear or physical damage.

Urgency level

Moderate – It is important to address this issue to ensure the vehicle's safety systems function correctly.

Legal and safety notice

Driving with a malfunctioning seat belt sensor may affect the deployment of airbags and other safety features.

Testing conditions

• Vehicle stationary

• Seat belt engaged and disengaged

Component location

The second row left seat belt sensor is located within the seat belt buckle on the left side of the second row of seats.

FAQs

Q: Can I drive with the B0053 code?
A: It's not recommended to drive with this code active as it may affect the vehicle's safety systems.

Q: How do I reset the seat belt sensor?
A: You can try disconnecting the vehicle's battery for a few minutes, but it's best to have a professional diagnose and reset the system.

Last updated: Jun 8, 2026 • Source: internal database
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