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B1919 OBD-II Trouble Code: Air Bag Memory Clear Circuit Short To Battery

diagnostic check engine light

B1919 code definition

A B1919 trouble code indicates that a shorted circuit instance has been detected relating to the Supplemental Restraint System (SRS)'s memory clear circuit.

What the B1919 code means

Unlike many other systems in a vehicle, the airbag system has its own computer a specialized memory to store data on crashes and accidents. A "memory clear" circuit specializes in processing and clearing airbag-related trouble codes once they have been dealt with accordingly. If the memory clear circuit has short-circuited, its function will be disabled.

What causes the B1919 code?

The most likely cause for the memory clear circuit shorting out is the circuit's wiring and electrical connectors. They may be improperly wired, faulty, or damaged. The battery feeding into the memory clear circuit is possibly faulty. The airbag's memory module itself could be faulty and malfunctioning.

What are the symptoms of the B1919 code?

In the case of a B1919 trouble code, other potential trouble codes related to the airbag system may be unable to clear. In addition, a stored B1919 trouble code and illuminated check engine lamp will be present in the vehicle. These symptoms are purely for the sake of diagnosing the problem.

How does a mechanic diagnose the B1919 code?

The B1919 trouble code may be first identified by scanning the vehicle's computer with an OBD-II code reader. All wiring and electrical connectors related to the SRS memory clear circuit should be checked for signs of disconnection, corrosion, damage or faultiness. The module and battery should be examined as well and tested for potential malfunction.

Common mistakes when diagnosing the B1919 code

Body-related trouble codes may describe different issues depending on the particular make and model of vehicle involved. Because trouble codes beginning with "B" can mean different things, it's important to verify that this particular code description pertains to your vehicle. Refer to the vehicle's user manual or contact the manufacturer if you're uncertain.

How serious is the B1919 code?

Although the B1919 trouble code shouldn't pose a threat to the vehicle's drivability overall, the inability to properly gauge potential airbag issues as a result may be a cause for concern. At the very least, the B1919 code can make it more difficult to address issues related to airbag deployment.

What repairs can fix the B1919 code?

If the memory module, battery , and/or other components related to the airbag system's memory clear circuit has been cited as malfunctioning, they should be taken out, repaired or replaced as needed. Any disconnected, faulty, broken or otherwise damaged wiring and/or electrical connectors should be repaired or replaced. If the ECU has been identified as damaged or faulty, it should be repaired or replaced as needed. After making any repairs for a B1919 code, the vehicle should be tested. This will let you see whether or not the memory clear problem has been solved.

Additional comments for consideration regarding the B1919 code

Because a B1923 trouble code will restrict your ability to see whether other SRS-related codes have been solved or not, it's a good idea to fix this one before other airbag codes, regardless of their severity. Make sure the ignition has been turned off for at least five minutes before moving on to repair anything associated with the airbag system. Accidentally triggering the airbag during repair can result in severe injury or death.

Need help with a B1919 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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