AutoCodes – Generic – B1924

B1924 Code - Air Bag Internal Diagnostic Monitor Fault or System Disarm Fault

Quick Answer

The Air Bag Control Module monitors the Air Bag Internal Diagnostic Monitor. Common causes include Faulty Air Bag Control Module, Air Bag Control Module harness is open or shorted, Air Bag Control Module circuit poor electrical connection. 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: B1924 indicates Air Bag Internal Diagnostic Monitor Fault or System Disarm Fault.
Common causes: Common causes include Faulty Air Bag Control Module, Air Bag Control Module harness is open or shorted, Air Bag Control Module circuit poor electrical connection.
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.

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Code Popularity 8,030

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 29, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1924 Description

The Air Bag Control Module monitors the Air Bag Internal Diagnostic Monitor. The Air Bag Control Module sets the OBDII code when the Air Bag Internal Diagnostic Monitor is not to factory specifications.

OBDII Code B1924 - Air Bag Internal Diagnostic Monitor Fault or System Disarm Fault - AutoCodes.com — B1924 Code - Air Bag Internal Diagnostic Monitor Fault or System Disarm Fault

What does this mean?

What are the Possible Causes of the DTC B1924?

Faulty Air Bag Control Module
Air Bag Control Module harness is open or shorted
Air Bag Control Module circuit poor electrical connection

How to Fix the DTC B1924?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1924 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B1924 code?

Need more information on how to fix the B1924 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1924 code diagnosed by a professional: Find a repair shop in your area

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 B1924 Code

1. What does OBDII code B1924 mean?

B1924 indicates an issue with the airbag system, specifically an internal diagnostic monitor fault or system disarm fault within the airbag control module.

2. What are the common symptoms of code B1924?

Typical symptoms include the airbag warning light staying on, the airbag system being disabled, and a possible lack of deployment during a collision.

3. What causes code B1924 to appear?

This code can be triggered by a faulty airbag control module, damaged wiring or connectors, a discharged backup power supply, or software corruption in the module.

4. Is it safe to drive with code B1924 active?

No, driving with this code active is not safe, as it indicates the airbag system may not function properly in the event of an accident.

5. How can code B1924 be diagnosed?

A technician will use a scan tool to read the code, inspect the airbag control module, check for damaged wiring or connectors, and test the backup power supply.

6. Can resetting the airbag control module clear code B1924?

Resetting the module may temporarily clear the code, but the underlying issue must be resolved to prevent the code from returning.

7. What repairs are typically needed for code B1924?

Repairs may include replacing the airbag control module, repairing or replacing damaged wiring or connectors, or addressing software issues within the module.

8. How much does it cost to fix code B1924?

Repair costs can vary widely but typically range from $300 to $1,000, depending on whether the airbag control module needs replacement or wiring repairs are required.

9. Can a blown fuse cause code B1924?

Yes, a blown fuse in the airbag system circuit can cause this code by cutting power to the airbag control module.

10. Do I need a professional to fix code B1924?

Yes, due to the complexity and safety-critical nature of the airbag system, itâ€™s recommended to have a professional handle the diagnosis and repair.