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 » B0108

Code B0108

Symptoms

• Airbag warning light on

• Airbags may not deploy in a crash

• Error message on dashboard

Common Causes

• Faulty airbag sensor

• Damaged wiring or connectors

• Malfunctioning airbag control module

Glossary

Airbag: A safety device in vehicles designed to inflate rapidly during a collision.

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

Related Codes

• B0107

• B0109

Laymans terms

This code means there's a problem with one of the sensors in the car that helps the airbags work properly. It's like a warning that something might be wrong with the safety system.

Explanation

The B0108 code indicates an issue with the airbag system sensor circuit.

Technical description

B0108 is a diagnostic trouble code (DTC) for a malfunction in the airbag sensor circuit, which could affect the deployment of the airbags during a collision.

Diagnosis steps

• Scan the vehicle for codes using an OBD-II scanner.

• Inspect the airbag sensor and related wiring for damage.

• Test the airbag control module for faults.

Repair procedures

• Replace the faulty airbag sensor.

• Repair or replace damaged wiring or connectors.

• Replace the airbag control module if necessary.

Tools required

• OBD-II scanner

• Multimeter

• Basic hand tools

Estimated repair cost

$150 - $600

Difficulty level

Moderate

Commonly affected vehicles

• Toyota Camry

• Honda Accord

• Ford F-150

Preventive measures

• Regular maintenance checks

• Inspect airbag system during service

• Avoid tampering with airbag components

Error code type

Safety System Issue

User experience recommendations

• Do not ignore the airbag warning light.

• Have the vehicle inspected by a professional as soon as possible.

Warranty information

Airbag components may be covered under a vehicle's safety warranty. Check with the manufacturer.

Historical data

This code has been associated with airbag sensor issues in various models over the years, often due to sensor wear or electrical faults.

Urgency level

High – Airbag system issues should be addressed immediately to ensure safety.

Legal and safety notice

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

Testing conditions

• Vehicle stationary

• Ignition on

Component location

The airbag sensor is typically located in the front of the vehicle, near the bumper or within the engine bay.

FAQs

Q: Can I drive with a B0108 code?
A: It's not recommended to drive with this code active, as it indicates a potential issue with the airbag system, which is crucial for safety.

Q: How do I reset the airbag warning light?
A: The light can be reset by fixing the underlying issue and using an OBD-II scanner to clear the code.

Last updated: Feb 19, 2026 • Source: internal database

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