B1927 Code - Passenger Side Airbag Fault

Quick Answer

The B1927 diagnostic trouble code indicates a fault with the passenger side airbag in the vehicle. Common causes include Faulty passenger side airbag module, Wiring issues such as damaged or corroded connections, Sensor malfunction detecting the presence of a passenger. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means

B1927 indicates Passenger Side Airbag Fault.

Common causes

Common causes include Faulty passenger side airbag module, Wiring issues such as damaged or corroded connections, Sensor malfunction detecting the presence of a passenger.

Severity

High - diagnose this code as soon as possible.

Can I drive?

Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

• Description
• Common Causes
• Symptoms
• How To Fix
• Cost to Fix
• FAQs
• Comments
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Common Causes of B1927

Symptoms of B1927

How to Fix B1927

Cost to Fix B1927

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Code B1927 Information for Specific Makes

• B1927 Lexus — Short To Ground In Rear Pretensioner Squib LH Circuit
• B1927 Scion — Short To Ground In Rear Pretensioner Squib LH Circuit
• B1927 Toyota — Short To Ground In Rear Pretensioner Squib LH Circuit

Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service

• Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
• Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
• Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
• Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.

Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B1927 Code

1. What does the OBDII code B1927 mean?

The B1927 code indicates a fault in the passenger side airbag circuit, usually due to a wiring issue, faulty connectors, or a malfunctioning airbag module.

2. What are common symptoms of the B1927 code?

Typical symptoms include an illuminated airbag warning light on the dashboard and possible deactivation of the passenger side airbag.

3. What causes the B1927 code to appear?

Common causes include damaged wiring, loose or corroded connectors, a defective passenger airbag module, or issues with the airbag control unit.

4. Can I drive my car with the B1927 code?

While the car may still be drivable, the airbag system may not function properly in an accident, which could compromise passenger safety.

5. How do I diagnose the B1927 code?

Diagnosis involves scanning the vehicle with an OBDII scanner, inspecting the wiring and connectors for damage or corrosion, and testing the passenger airbag module for faults.

6. What tools are needed to fix the B1927 code?

You’ll need an OBDII scanner, a multimeter for electrical testing, and basic tools to access and inspect the airbag components.

7. How much does it cost to repair the B1927 code?

Repair costs vary depending on the issue. Fixing a simple wiring problem might cost less than $100, while replacing the airbag module could cost several hundred dollars.

8. Can a blown fuse cause the B1927 code?

A blown fuse could potentially contribute to the problem if it interrupts power to the airbag system, so checking the fuses is a good first step.

9. Do I need to replace the passenger airbag if I get the B1927 code?

Not necessarily. The issue may be with the wiring or connectors rather than the airbag itself. Proper diagnosis will determine what needs replacement.

10. Can I reset the B1927 code without repairing the issue?

Resetting the code without addressing the root cause will likely result in the code returning, as the underlying fault still exists.