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B1910 OBD-II Trouble Code: Air Bag Diagnostic Monitor Ground Circuit Failure

diagnostic check engine light

B1910 code definition

The B1910 trouble code detects an airbag diagnostic monitor circuit failure.

What the B1910 code means

The B1910 code is a generic OBD-II trouble code that notes a circuit malfunction from the airbag diagnostic monitor. The airbag diagnostic monitor (also known as the airbag control module) receives feedback from the airbag crash sensors when the vehicle is experiencing severe impact, and the monitor then triggers the airbags to deploy. The diagnostic monitor also is responsible for checking the airbag system during startup, and making sure that all of the systems are operating correctly. If an airbag diagnostic monitor circuit failure is detected by the body control module or powertrain control module (PCM), then the B1910 code may be triggered.

What causes the B1910 code?

The B1910 trouble code is most commonly caused by electrical failures, either in the airbag diagnostic monitor itself, or in the airbag deployment system. Short circuits and wires, loose connectors, and blown fuses can all trigger the B1910 code. It is also fairly common for the diagnostic monitor itself to fail, which will store the code as well. While a little rarer, the code may be the result of the diagnostic monitor requiring a reprogramming.

What are the symptoms of the B1910 code?

The B1910 trouble code will usually result in the airbag Warning Light illuminating or flashing on the gauge cluster. The check engine soon Warning Light will likely illuminate as well. More seriously, the airbag system will probably not work, so the vehicle will be without airbags if an accident were to take place.

How does a mechanic diagnose the B1910 code?

The B1910 code will need to be diagnosed using a standard OBD-II trouble code scanner. A trustworthy mechanic will use the scanner to look at the freeze frame data and assess the code, while also checking to see if other trouble codes have been detected. If there are numerous codes stored, then the mechanic will need to diagnose and inspect them in the order in which they are displayed. The codes will then be reset, the vehicle restarted, and the B1910 code checked for again. If the code is no longer present, then an intermittent error, or perhaps an inaccurate detection is likely to blame.

If the code persists after the reset, the technician will need to visually inspect all of the electrical components in the airbag system, checking closely for any damage or shorts to the wires or connectors. The airbag diagnostic monitor will then need to be checked. If the diagnostic monitor’s internal thermal fuse is blown, then the entire monitor will need to be replaced. Unlike other fuses, the internal thermal fuse is purposely blown by the diagnostic monitor when a circuit malfunction is detected, to prevent unwanted airbag deployment. A new fuse cannot be installed, and both the diagnostic monitor and the electrical component causing the short will need to be replaced.

After any components are replaced, the trouble codes should again be reset, the vehicle restarted, and the B1910 code checked for. By doing this, the mechanic will know when the issue has been resolved and the diagnosis is complete.

Common mistakes when diagnosing the B1910 code

The most frequently made error when diagnosing this code is the failure to properly follow the OBD-II trouble code diagnosis protocol. Mechanics should abide by the protocol step by step at all times, to help ensure thorough and efficient diagnoses and repairs.

It is fairly common for defective airbag diagnostic monitors to be replaced without the electrical system first being inspected and repaired. If the diagnostic monitor failed because of a shorted wire, then the new monitor will also fail and need to be replaced, which is both inefficient and costly.

How serious is the B1910 code?

A vehicle with a detected B1910 code will still be drivable, and will not have any drivability issues. However, the airbag system likely will not work, so the airbags will not be deployed if there is an accident. Since airbags are crucial safety features that frequently save lives, the vehicle should not be driven until it has been inspected and repaired.

What repairs can fix the B1910 code?

Possible repairs of the B1910 code include:

Additional comments for consideration regarding the B1910 code

The B1910 trouble code is a manufacturer specific code, which means that it has a different definition depending on the automaker. Technicians should always be aware of the vehicle they are diagnosing when working on the B1910 code.

Anytime the airbags have been deployed, the airbag diagnostic monitor will need to be either reprogrammed, or replaced.

Need help with a B1910 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.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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