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Code B0055

Quick reference

B0055 at a glance

Plain-language meaning
This code means there's a problem with the sensor that checks if the seat belt is being used in the second row on the right side of the car.
Urgency
High – This issue affects vehicle safety systems and should be addressed immediately.
Difficulty
Moderate
System
Sensor Issue
Tools mentioned
OBD-II scanner, Multimeter, Basic hand tools

This summary uses the existing diagnostic information shown in full below.

Laymans terms

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

Explanation

The B0055 code is triggered when the vehicle's control module detects an issue with the seat belt sensor located in the second row, right side.

Technical description

The second row right seat belt sensor is responsible for detecting whether the seat belt is fastened. This information is used by the vehicle's safety systems to ensure proper airbag deployment and other safety features. A malfunction in this sensor can lead to incorrect readings, affecting safety system performance.

Symptoms

• Seat belt warning light on

• Airbag warning light on

• Incorrect seat belt status indication

Common Causes

• Faulty seat belt sensor

• Damaged wiring or connector

• 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.

Diagnosis steps

• Inspect the seat belt sensor for damage.

• Check wiring and connectors for signs of wear or damage.

• Use a diagnostic tool to read the sensor data and confirm the fault.

Repair procedures

• Replace the faulty seat belt sensor.

• Repair or replace damaged wiring or connectors.

• Reprogram or replace the control module if necessary.

Tools required

• OBD-II scanner

• Multimeter

• Basic hand tools

Estimated repair cost

$100 - $300

Difficulty level

Moderate

Commonly affected vehicles

• Chevrolet Tahoe

• GMC Yukon

• Cadillac Escalade

Preventive measures

• Regularly inspect seat belt sensors and wiring.

• Avoid spilling liquids on seat belt components.

• Ensure seat belts are used properly to avoid unnecessary wear.

Error code type

Sensor Issue

User experience recommendations

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

• Ensure all passengers are using seat belts properly.

• Address the issue promptly to maintain vehicle safety.

Warranty information

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

Historical data

This code has been associated with seat belt sensor issues in vehicles with advanced safety systems.

Urgency level

High – This issue affects vehicle safety systems and should be addressed immediately.

Testing conditions

• Vehicle parked on a level surface

• Ignition in the 'on' position without starting the engine

Component location

The sensor is located within the seat belt assembly on the right side of the second row of seats.

FAQs

Q: Can I drive with the B0055 code?
A: It's not recommended as it could affect the performance of safety systems.

Q: How do I reset the B0055 code?
A: After fixing the issue, use an OBD-II scanner to clear the code.

Optional diagnostic gear

Tools that may help diagnose B0055

FOXWELL Multi-System Scanner diagnostic tool illustration

Pro · Four-system diagnostics

FOXWELL Multi-System Scanner

A handheld scanner aimed at engine, transmission, ABS, and airbag diagnostic work.

Body and airbag faults often need a scanner that can access more than generic powertrain codes.

View on Amazon
Klein Tools MM325 diagnostic tool illustration

Universal · Digital multimeter

Klein Tools MM325

A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.

Helpful for checking power, ground, and continuity in body-system circuits.

View on Amazon
Bussmann Fuse Assortment diagnostic tool illustration

Universal · Fuse kit

Bussmann Fuse Assortment

Useful for electrical diagnosis when blown fuses or circuit faults are part of the troubleshooting process.

Useful when body electrical faults trace back to blown fuses or shared circuits.

View on Amazon

These are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.

Source: ezOBD2 diagnostic database
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