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 » B0081

Code B0081

Symptoms

• Airbag warning light on

• Passenger airbag may not deploy

• Error message on dashboard

Common Causes

• Faulty passenger seat airbag sensor

• Damaged wiring or connectors

• Malfunctioning airbag control module

Glossary

Airbag: A safety device in vehicles that inflates upon impact to protect occupants.

OBD-II: On-Board Diagnostics, a system that monitors vehicle performance and reports issues.

Related Codes

• B0080

• B0082

Laymans terms

This code means there's a problem with the car's airbag system, specifically with the passenger seat. It might not work right in a crash.

Explanation

B0081 indicates an issue with the passenger seat airbag system.

Technical description

The B0081 code is triggered when there is a malfunction in the passenger seat airbag system, which could be due to a faulty sensor or wiring issue.

Diagnosis steps

• Check the airbag warning light

• Inspect passenger seat airbag sensor and wiring

• Use a diagnostic scanner to read airbag system codes

Repair procedures

• Replace faulty airbag sensor

• Repair or replace damaged wiring

• Reset the airbag control module

Tools required

• OBD-II scanner

• Multimeter

• Screwdrivers

Estimated repair cost

$150 - $500

Difficulty level

Moderate

Commonly affected vehicles

• Chevrolet Malibu

• GMC Sierra

• Cadillac CTS

Preventive measures

• Regularly inspect airbag system

• Avoid placing heavy items on passenger seat

• Ensure wiring is not pinched or damaged

Error code type

Safety System Issue

User experience recommendations

• Do not ignore the airbag warning light

• Have the airbag system inspected by a professional

• Avoid using the passenger seat until repaired

Warranty information

Airbag systems may be covered under extended warranties. Check with your dealer.

Historical data

This code has been associated with airbag sensor issues in various models, particularly in vehicles with advanced airbag systems.

Urgency level

High – Airbag system issues can affect safety in a crash.

Legal and safety notice

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

Testing conditions

• Vehicle ignition in ON position

• Passenger seat occupied

Component location

The passenger seat airbag sensor is located under the passenger seat.

FAQs

Q: Can I still drive my car with the B0081 code?
A: It's not recommended to drive with this code, as the passenger airbag may not work properly.

Q: How do I reset the airbag warning light?
A: The airbag warning light should only be reset after the issue is fixed, using an OBD-II scanner.

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

Diagnose Your Check Engine Light