What is an OBD2 code?

An OBD2 (On-Board Diagnostics) code is a diagnostic trouble code (DTC) generated by your vehicle's computer system when it detects a problem. These codes help identify specific issues with your vehicle's engine, transmission, emissions, or other systems.

How do I read OBD2 codes?

To read OBD2 codes, you'll need an OBD2 scanner. Plug it into your vehicle's OBD2 port (usually located under the dashboard), turn your key to the 'ON' position, and follow your scanner's instructions to retrieve the codes. Each code starts with a letter (P, B, C, or U) followed by four numbers.

What do the different types of OBD2 codes mean?

OBD2 codes are categorized by their first letter: P (Powertrain) for engine and transmission issues, B (Body) for interior systems like airbags, C (Chassis) for mechanical systems like brakes, and U (Network) for computer and module communication problems.

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Home » OBD2 Codes » B0048

Code B0048

Symptoms

• Airbag warning light is on

• Airbag system disabled

• Possible chime or alert sound

Common Causes

• Faulty airbag module

• Damaged wiring or connectors

• Defective clock spring

Glossary

Airbag Module: A device that controls the deployment of airbags.

Clock Spring: A spiral-wound electrical connector that maintains continuity for the airbag system.

Related Codes

• B0049

• B0050

Laymans terms

This code means there's a problem with one of the car's airbags. It's like when a toy doesn't work because its battery is missing or broken.

Explanation

The B0048 code indicates a fault in the airbag system, specifically related to the passenger frontal deployment loop.

Technical description

B0048 is a diagnostic trouble code (DTC) that refers to an issue in the airbag system. It typically involves the passenger frontal airbag deployment loop, which may be experiencing a short or open circuit, or a high resistance issue.

Diagnosis steps

• Check the airbag system for stored codes.

• Inspect wiring and connectors for damage.

• Test the clock spring for continuity.

Repair procedures

• Replace faulty airbag module.

• Repair or replace damaged wiring/connectors.

• Replace defective clock spring.

Tools required

• OBD-II scanner

• Multimeter

• Basic hand tools

Estimated repair cost

$200 - $600

Difficulty level

Moderate

Commonly affected vehicles

• Chevrolet Silverado

• GMC Sierra

• Cadillac Escalade

Preventive measures

• Regularly inspect airbag system components.

• Avoid tampering with airbag wiring.

• Schedule regular vehicle diagnostics.

Error code type

Safety System Issue

User experience recommendations

• Do not ignore the airbag warning light.

• Consult a professional mechanic for repairs.

Warranty information

Airbag systems may be covered under extended warranty; check with your manufacturer.

Historical data

B0048 has been a common code in vehicles with aging airbag systems, often due to wear and tear or environmental factors.

Urgency level

High – Airbag issues can compromise safety in the event of a collision.

Legal and safety notice

Operating a vehicle with a malfunctioning airbag system can be dangerous and may violate safety regulations.

Testing conditions

• Vehicle ignition on

• Airbag system self-test

Component location

The airbag module is usually located in the steering wheel or dashboard.

FAQs

Q: Can I drive with a B0048 code?
A: It's not recommended to drive with an airbag fault, as it can compromise safety.

Q: Will resetting the code fix the problem?
A: Resetting the code without repairs may temporarily clear the warning, but the issue will likely return.

Last updated: Oct 28, 2025 • Source: internal database

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