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 » B0079

Code B0079

Symptoms

• Airbag warning light is on

• Airbags may not deploy in an accident

• Possible error messages on the dashboard

Common Causes

• Faulty side impact sensor

• Damaged wiring or connectors

• Faulty airbag control module

Glossary

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

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

Related Codes

• B0080

• B0081

Laymans terms

This code means there's a problem with a part of the car that helps keep you safe in a crash. It's like a warning that something isn't working right with the safety system.

Explanation

B0079 is a code related to the airbag system, indicating an issue with a specific sensor or circuit.

Technical description

The B0079 code is triggered when the airbag control module detects a malfunction in the side impact sensor circuit. This could be due to an open or short circuit, or a faulty sensor.

Diagnosis steps

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

• Inspect the wiring and connectors for damage.

• Test the side impact sensor for proper operation.

Repair procedures

• Replace the faulty side impact 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 - $500

Difficulty level

Moderate

Commonly affected vehicles

• Chevrolet Silverado

• GMC Sierra

• Cadillac Escalade

Preventive measures

• Regularly inspect and maintain vehicle wiring.

• Avoid water intrusion in the vehicle interior.

• Ensure sensors are not physically damaged.

Error code type

Safety System Issue

User experience recommendations

• Do not ignore the airbag warning light.

• Have the vehicle inspected by a professional.

• Avoid driving the vehicle until the issue is resolved.

Warranty information

Check with your vehicle manufacturer for warranty coverage on safety systems.

Historical data

The B0079 code has been associated with issues in vehicles with side impact sensors, particularly in models from the early 2000s.

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 not comply with vehicle safety regulations.

Testing conditions

• Vehicle parked on a level surface

• Ignition in the 'On' position

Component location

The side impact sensor is typically located in the door or near the B-pillar of the vehicle.

FAQs

Q: Can I drive with a B0079 code?
A: It's not recommended to drive with a B0079 code as it indicates a potential issue with the airbag system.

Q: How do I reset the airbag light?
A: After fixing the issue, an OBD-II scanner can be used to clear the code and reset the airbag light.

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

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