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.

🖨️

Home » OBD2 Codes » B0099

Code B0099

Symptoms

• Airbag warning light is on

• Airbag system not functioning

• Error message on dashboard

Common Causes

• Faulty airbag module

• Damaged wiring or connectors

• Malfunctioning airbag sensor

Glossary

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

OBD-II Scanner: A tool used to read and clear diagnostic trouble codes from a vehicle's computer.

Related Codes

• B0100

• B0101

Laymans terms

This code means there's a problem with the car's airbag system. It's like when a toy's safety button doesn't work properly.

Explanation

The B0099 code indicates an issue with the vehicle's airbag system, specifically related to a deployment control circuit.

Technical description

B0099 is a diagnostic trouble code (DTC) for a fault in the airbag deployment control circuit. This could involve a malfunction in the airbag module, wiring, or connectors that affect the airbag's ability to deploy correctly in the event of a collision.

Diagnosis steps

• Check the airbag warning light on the dashboard.

• Inspect the wiring and connectors related to the airbag system.

• Use an OBD-II scanner to read the fault codes and confirm B0099.

Repair procedures

• Replace or repair damaged wiring or connectors.

• Replace the faulty airbag module.

• Clear the code and test the system.

Tools required

• OBD-II scanner

• Multimeter

• Screwdrivers and socket set

Estimated repair cost

$200 - $600

Difficulty level

Moderate

Commonly affected vehicles

• Toyota Camry

• Ford F-150

• Honda Accord

Preventive measures

• Regularly inspect airbag system components.

• Avoid moisture exposure to the airbag system.

• Follow vehicle maintenance schedules.

Error code type

Safety System Issue

User experience recommendations

• Do not ignore the airbag warning light.

• Have a professional inspect the system as soon as possible.

Warranty information

Airbag systems are often covered under extended warranties. Check with your manufacturer or dealer.

Historical data

This code has been associated with issues in vehicles with aging airbag systems or after minor collisions.

Urgency level

High – The airbag system is crucial for safety in a collision.

Legal and safety notice

Driving with a malfunctioning airbag system can be unsafe and may not comply with vehicle safety regulations.

Testing conditions

• Vehicle parked and engine off

• Access to the airbag system components

Component location

The airbag module is typically located in the steering wheel, dashboard, or seats.

FAQs

Q: Can I drive with the B0099 code?
A: It's not recommended to drive with this code active, as it indicates a problem with the airbag system which is crucial for safety.

Q: How do I reset the airbag light?
A: After repairs, use an OBD-II scanner to clear the code. If the issue persists, further diagnosis is needed.

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

Diagnose Your Check Engine Light