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 » B0088

Code B0088

Symptoms

• Airbag warning light is on

• Airbag system may not deploy in an accident

• Error message on dashboard

Common Causes

• Faulty passenger presence sensor

• Damaged wiring or connectors

• Defective airbag control module

Glossary

Airbag: A safety device in vehicles designed to inflate in the event of a collision.

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

Related Codes

• B0087

• B0089

Laymans terms

This code means there's a problem with the airbag system in your car. It's like when a toy's safety feature isn't working right.

Explanation

The B0088 code indicates a fault in the airbag system, specifically related to a sensor or circuit issue.

Technical description

B0088 is a diagnostic trouble code (DTC) that refers to a fault in the airbag system. This could be due to a malfunction in the passenger presence sensor or a related circuit issue, which affects the airbag deployment system.

Diagnosis steps

• Scan the vehicle for codes using an OBD-II scanner.

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

• Test the passenger presence sensor for proper function.

Repair procedures

• Replace the faulty passenger presence 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

$200 - $600

Difficulty level

Moderate

Commonly affected vehicles

• Chevrolet Malibu

• GMC Sierra

• Buick Enclave

Preventive measures

• Regularly inspect airbag system components.

• Avoid placing heavy objects on passenger seats.

• Ensure all recalls are addressed promptly.

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's manufacturer for warranty coverage on safety systems.

Historical data

B0088 has been reported in various models, often related to sensor failures or wiring issues.

Urgency level

High – Airbag system faults should be addressed immediately to ensure safety.

Legal and safety notice

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

Testing conditions

• Vehicle ignition in the ON position.

• Passenger seat occupied.

Component location

The passenger presence sensor is typically located under the passenger seat.

FAQs

Q: Can I drive with a B0088 code?
A: It's not recommended to drive with this code active as the airbag system may not function properly in an accident.

Q: How do I reset the airbag light?
A: The airbag light can be reset with an OBD-II scanner after the issue is repaired.

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

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