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 » B0071

Code B0071

Symptoms

• Airbag warning light is on

• Airbag system is disabled

• No deployment of side airbags in a collision

Common Causes

• Faulty side airbag sensor

• Damaged wiring or connectors

• Faulty airbag control module

Glossary

Airbag Control Module: The computer that manages the airbag deployment system.

Sensor Circuit: The electrical pathway that transmits signals from the sensor to the control module.

Related Codes

• B0070

• B0072

Laymans terms

This code means there's a problem with the airbag system in your car. It's like when a toy's safety switch is broken, and it can't work properly.

Explanation

B0071 is an OBD-II code indicating an issue with the side airbag sensor circuit.

Technical description

The B0071 code is triggered when the airbag control module detects a fault in the side airbag sensor circuit, which could be due to a short, open, or poor connection.

Diagnosis steps

• Scan the vehicle for additional codes

• Inspect the side airbag sensor and wiring

• Test the airbag control module

Repair procedures

• Replace the faulty side airbag sensor

• Repair or replace damaged wiring

• 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 Malibu

• Toyota Camry

• Ford F-150

Preventive measures

• Regularly inspect airbag system components

• Avoid water exposure to electrical components

• Perform routine vehicle diagnostics

Error code type

Safety System Issue

User experience recommendations

• Do not ignore the airbag warning light

• Consult a professional mechanic for diagnosis

• Avoid driving the vehicle until repaired

Warranty information

Airbag system components may be covered under a vehicle's safety warranty.

Historical data

This code has been associated with manufacturing defects in some vehicle models, leading to recalls.

Urgency level

High – The airbag system may not function correctly, posing a safety risk.

Legal and safety notice

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

Testing conditions

• Vehicle ignition in the ON position

• Airbag system self-test completed

Component location

The side airbag sensor is typically located within the vehicle's door or seat.

FAQs

Q: What happens if I ignore this code?
A: Ignoring this code can lead to the airbag system not deploying in an accident, increasing the risk of injury.

Q: Can I fix this problem myself?
A: Due to the complexity and safety concerns, it's recommended to have a professional handle airbag system repairs.

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

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