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 » B0116

Code B0116

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

• Faulty airbag control module

Glossary

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

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

Related Codes

• B0115

• B0117

Laymans terms

This code means there's a problem with a sensor in your car that helps control the airbag system. It's like when a toy's battery is low and it doesn't work right.

Explanation

The code B0116 indicates an issue with the airbag sensor circuit.

Technical description

B0116 is a diagnostic trouble code (DTC) for an airbag sensor circuit malfunction. This code is set when the airbag control module detects an abnormal reading or fault in the airbag sensor circuit, which could affect the deployment of the airbags.

Diagnosis steps

• Use an OBD-II scanner to confirm the code.

• Inspect the airbag sensor and its 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

• Screwdriver set

Estimated repair cost

$200 - $600

Difficulty level

Moderate

Commonly affected vehicles

• Toyota Camry

• Honda Accord

• Ford F-150

Preventive measures

• Regularly inspect airbag system components.

• Avoid water damage to the vehicle's interior.

• Have the airbag system checked during routine maintenance.

Error code type

Sensor 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 systems may be covered under a vehicle's safety warranty. Check with your manufacturer.

Historical data

This code has been associated with sensor failures in older vehicle models, especially those exposed to harsh conditions.

Urgency level

High – Airbag issues can affect vehicle safety.

Legal and safety notice

Driving with a malfunctioning airbag system may violate safety regulations and increase the risk of injury in an accident.

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 steering column.

FAQs

Q: Can I drive with a B0116 code?
A: It's not recommended as the airbag system may not function properly in an accident.

Q: How do I reset the airbag light?
A: After repairs, the airbag light can be reset using an OBD-II scanner.

Last updated: Feb 8, 2026 • Source: internal database

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