B1907 OBD-II Trouble Code: Air Bag Crash Sensor #2 Ground Circuit Failure

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

Red-stars EXCELLENT RATING ON

Cost of diagnosing the B1907 code

B1907 is a diagnostic trouble code (DTC) for "Air Bag Crash Sensor #2 Ground Circuit Failure". 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 B1907 DIAGNOSTIC Get a fair and transparent estimate upfront

B1907 code definition

The B1907 trouble code detects a circuit failure in the #2 airbag crash sensor.

What the B1907 code means

The B1907 code is a generic OBD-II trouble code that implies a #2 airbag crash sensor circuit malfunction. The #2 crash sensor is used, along with the other crash sensors, to determine when the vehicle is experiencing extreme impact, so that the airbags can be deployed. As the number and location of the airbag crash sensors varies from vehicle to vehicle, there is no specific location that the #2 crash sensor will be placed in. If the body control module, airbag control module, or powertrain control module (PCM) detect a circuit voltage reading from the #2 airbag crash sensor that is unusual, then the B1907 code might be triggered.

What causes the B1907 code?

There are two fairly common causes of the B1907 trouble code. The first is damaged or defective electrical components, such as the wires, fuses, or connectors in the system, or even the circuit itself. The second is a faulty #2 airbag crash sensor. It is also possible, though very rare, that a defective PCM, airbag control module, or powertrain control module is causing the B1907 code.

What are the symptoms of the B1907 code?

When the B1907 code is detected, the check engine soon Warning Light will likely illuminate on the gauge cluster, and the airbag Warning Light may illuminate as well. In most cases, the airbag system will not properly function, so the airbags will be unlikely to inflate in the event of an accident.

How does a mechanic diagnose the B1907 code?

The B1907 code will be diagnosed using a basic OBD-II trouble code scanner. A reputable mechanic can use the scanner to look at the freeze frame data and gather information about the B1907 code, while also checking to see if there are any other trouble codes present. If there are, then the codes should be addressed in the order that they appear in. The trouble codes will then be reset, the vehicle restarted, and the B1907 code checked for. If the code is no longer detected, then it was likely triggered inaccurately, or is the result of an intermittent issue.

If the B1907 code remains present, then the mechanic will visually inspect the fuses, wires, and connectors in the crash sensor system, and replace any that are damaged or otherwise compromised. The circuit will then need to be checked, followed by an inspection of the #2 airbag crash sensor.

After any part is replaced, the codes will again need to be reset, the vehicle restarted, and the B1907 code checked for. By doing this, the mechanic will know as soon as the problem is resolved.

Common mistakes when diagnosing the B1907 code

The most commonly made mistake when diagnosing the B1907 code comes from a failure to properly adhere to the OBD-II code diagnosis protocol. The diagnosis protocol should by complied with during every diagnosis, to help guarantee efficient and accurate inspections and repairs.

Often, operational airbag crash sensors are erroneously replaced when the electrical components are not first inspected.

How serious is the B1907 code?

A vehicle with a detected B1907 trouble code will display no drivability problems. The airbag system will likely be inoperable though, which means that the driver and passengers will not have airbags if an accident happens. Airbags are important safety features that can save lives, so the vehicle should not be driven until an inspection and repair have taken place.

What repairs can fix the B1907 code?

Possible repairs for the B1907 trouble code are:

  • Replacement of the #2 airbag crash sensor circuit
  • Replacement of the wires, connectors, or fuses
  • Replacement of the #2 airbag crash sensor
  • In rare cases, replacement of the airbag control module, body control module, or PCM

Additional comments for consideration regarding the B1907 code

The B1907 code is a manufacturer specific trouble code. Manufacture specific codes are trouble codes that have different definitions depending on the automaker. For some cars, the B1907 code will detect a different issue than a #2 airbag crash sensor circuit failure. Mechanics should always pay attention to the vehicle they are inspecting when diagnosing this code.

Need help with a B1907 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
B1907

No more waiting rooms! Our mechanics will come to you to diagnose and fix the B1907 code.

SCHEDULE B1907 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating

(6,144)

Rating Summary
5,685
221
51
35
152
5,685
221
51
35
152

Chris

11 years of experience
13 reviews
Chris
11 years of experience
Ford F-150 - Check Engine Light is on - North Salt Lake, Utah
We were having problems with our check engine light, and Chris was exceptionally thorough until he found the problem and could help resolve the situation. We appreciate having someone who cares enough to get the job done right, not just done. We will definitely use Chris' services in the future. Thanks Chris.

Leng

21 years of experience
2 reviews
Leng
21 years of experience
Mazda MPV - Check Engine Light is on - Seattle, Washington
Leng arrived on time and explained the issue that my van is having. I will make a follow up appointment for the fix. Friendly, easy to talk to, and professional - thank you very much!

Okela

13 years of experience
11 reviews
Okela
13 years of experience
Land Rover LR4 - Check Engine Light is on - Brooklyn, New York
Okela was incredible! He is super thorough and took time to walk us through the issues with our LR4. Couldn’t recommend more! Thank you Okela!!

Robert

37 years of experience
188 reviews
Robert
37 years of experience
Land Rover LR2 - Check Engine Light is on - Atlanta, Georgia
Robert arrived on time. Did a diagnostic check quickly. He was friendly, and gave great service. He knows how to work on a Land Rover.


More related articles

P0146 OBD-II Trouble Code: O2 Sensor Circuit No Activity Detected (Bank 1, Sensor 3)
P0146 P0146 code definition O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 3) What the P0146 code means P0146 is the OBD-II generic code indicating the O2 sensor for bank 1 sensor 3 fails to have a voltage change...
P0092 OBD-II Trouble Code: Fuel Pressure Regulator 1 Control Circuit High
P0092 code definition Fuel Pressure Regulator 1 Control Circuit High What the P0092 Code Means The P0092 code means that the fuel...
P0263 OBD-II Trouble Code: Cylinder Number 1 Contribution/Balance Fault
P0263 P0263 code definition Cylinder Number 1 Contribution/Balance Fault What the P0263 code means P0263 is an [OBD-II diagnostic trouble code] which indicates that the engine control module (ECM) detected the cylinder number 1 having low contribution to the running...

Related questions

How much should it cost to repair an airbag controller?

Hello - yes, by all means this should be repaired! Without it, your airbag is just dead weight in the vehicle, and offers no protection in the event of a crash. Was the vehicle in an accident which damaged the...

Where is the plug in for the code reader?

Your vehicle's OBD connector is located on the driver's side of the vehicle underneath the dash to the right of the steering column just above the gas pedal.

OBD sensor not reading scanner

This sounds like there is no power to the data bus network. This means that the OBD2 plug on your vehicle is not being powered by the battery. I would enlist the help of a qualified technician to find a wiring...

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