B1924 OBD-II Trouble Code: Air Bag Internal Diagnostic Monitor Fault or System Disarm Fault

Our certified mechanics come to you · Get a fair and transparent estimate upfront

Red-stars EXCELLENT RATING ON

Cost of diagnosing the B1924 code

B1924 is a diagnostic trouble code (DTC) for "Air Bag Internal Diagnostic Monitor Fault or System Disarm Fault". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$20.00
Toyota$20.00
BMW$20.00
SCHEDULE B1924 DIAGNOSTIC Get a fair and transparent estimate upfront

B1924 definition

A B1924 trouble code is related to a vehicle’s air bag diagnostic monitor system that can purposely disarm the supplemental restraint system (SRS) if a fault is detected.

What the B1924 code means

B1924 is an OBD-II body code (hence the B) for a voltage or resistance issue within the air bag system circuit. When the ignition is turned to the “on” position, your vehicle’s OBD-II system will perform several self-tests, and a failed test from the air bag system can result in a B1924. This code will attempt to open a specific power distribution box fuse to disarm the SRS, preventing unwanted air bag deployment.

What causes the B1924 code?

The most common causes for a B1924 are:

  • Faulty power distribution box fuse
  • Faulty battery voltage, resistance, or connection
  • Faulty air bag diagnostic monitor
  • Faulty charging system, i.e. faulty alternator

What are the symptoms of the B1924 code?

Symptoms should go unnoticed other than a check engine light and or air bag light on the dash. In the event of an accident, chances are high the air bag will not deploy.

How does a mechanic diagnose the B1924 code?

Because a B1924 may be an intermittent issue caused by improper installation of a battery or previous wiring harness repairs, your mechanic will typically first clear the code and reset the vehicle’s engine computer. After this, they will test the vehicle to ensure it can run a number of self-tests at startup. This will help determine if there is a more serious problem as proper installation of a battery (tightening leads, repairing frayed wires, etc.) can fix a B1924 code.

However, if the code returns after all of this, your mechanic will inspect fuses within the vehicle’s power distribution box. They will replace any blown fuse with an exact value replacement and test for the code through the vehicle’s self-test.

Common mistakes when diagnosing the B1924 code

A blown fuse will not always be the cause of a B1924, so it’s important to try simple fixes first, such as resetting the engine computer or resecuring the battery.

How serious is the B1924 code?

Because a B1924 will attempt, and most likely succeed, in temporarily disarming the SRS, you shouldn’t be in any danger of the air bag deploying. On the flipside, not having a working SRS is a danger in and of itself.

What repairs can fix the B1924 code?

The most common repairs for a B1924 are as follows:

Additional comments for consideration regarding the B1924 code

A B1924 air bag code will be specific to a Ford manufactured vehicle. Any work that needs to be conducted on a vehicle’s SRS should be handled by a trained professional. The air bag could unexpectedly deploy while working to fix a B1924

Need help with a B1924 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

trouble codes
OBD-II
B1924

No more waiting rooms! Our mechanics will come to you to diagnose and fix the B1924 code.

SCHEDULE B1924 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.8/5

Number of Reviews

5,606

Rating Summary
5,180
205
50
34
137
5,180
205
50
34
137

James

40 years of experience
34 reviews
James
40 years of experience
Ford F-150 - Check Engine Light is on - Chagrin Falls, Ohio
Jim was great! Arrived on time, quickly diagnosed the problem and recommended further work. Very helpful, I’ll use Jim again and recommend to family and friends.

Roberto

11 years of experience
137 reviews
Roberto
11 years of experience
Nissan Titan - Check Engine Light is on - Spring, Texas
Roberto was very thorough with his explanation of repairs needed. I will contact your mechanic for future repairs.

Matthew

32 years of experience
839 reviews
Matthew
32 years of experience
Kia Optima - Check Engine Light is on - Yorktown, Virginia
Matthew Lerman was God Sent, and thank God for Your Mechanic,, you have my Vote Looking , Looking forward for more Business. Very Honest Guy

Robert

20 years of experience
38 reviews
Robert
20 years of experience
Honda Accord - Check Engine Light is on - Brentwood, California
He came earlier than on time and got the job done faster than I seen anyone else have . Solid honest hard working dude.


More related articles

B1300 OBD-II Trouble Code: Power Door Lock Circuit Failure
B1300 means there is an error with the power door lock circuit, likely caused by a defector power door lock relay or power door lock actuator.
P2257 OBD-II Trouble Code: Secondary Air Injection System Control A Circuit Low
P2257 P2257 code definition Secondary Air Injection System Control A Circuit Low What the P2257 code means P2257 is an OBD-II generic code. The Engine Control Module (ECM) monitors the secondary air injection system control valve A circuit, when the...
P0046 OBD-II Trouble Code: Turbo/Super Charger Boost Control Solenoid Circuit Range/Performance
P0046 code definition Turbo/Super Charger Boost Control Solenoid Circuit Range/Performance What the P0046 code means This code has varied definitions as provided...

Related questions

The Check Engine Light is on but the scanner shows no codes.

The brand, type, quality, and manufacturer coverage of the scanner you bought will dictate how they read the codes. Unfortunately, not all scan tools are created equal. When it comes to hybrid vehicles, you may want to make sure you...

Engine came on and we took it to Autozone. Code read P0430

Hello. This issue can be caused by a failing catalytic converter or by a bad oxygen sensor. As for driving the vehicle, if it is not lacking any power then it should be fine to drive. The only time a...

I had the catalyst converter replaced last year. Now the Check Engine Light is on again for O2 sensor. What do I do?

You may want to have a professional inspect the catalytic converter. When the Check Engine Light comes on for this, it does not necessarily mean that the catalytic converter has failed. This may be related to many other things as...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com