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B1992 is a diagnostic trouble code (DTC) for "Driver Side, Side mount Air Bag Circuit Short to Vbatt". 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.
A B1992 trouble code is stored by the Powertrain Control Module (PCM) after it receives a voltage signal from the side mount air bag circuit that falls out of the range signified by the manufacturer's specifications. Some related codes that a mechanic might also find stored in addition to the B1992 trouble code include a B1993, B1994, B1995, B1996, B1997, B1998, and B1999 code.
The storage of a B1992 trouble code by the PCM means that the voltage from the side mount air bag circuit is higher or lower than the parameters set by the vehicle manufacturer. Subsequently, the Supplemental Restraint System (SRS) light will come on when the B1992 trouble code is stored. Also, in most vehicles, the SRS is disabled, including the air bags not deploying or the seatbelts not tightening as they should.
Some common causes of a B1992 trouble code include loose or bad wiring, a fault with the ground wire, or a fault within the air bag itself. A mechanic should keep in mind that having to disconnect the battery also causes the SRS system to reset. And, in some cases, this action might require a mechanic to reprogram the control module associated with the air bag system. The air bag system may be prevented from working until this step is performed.
Probably the only indicator of a bad driver side air bag is the storage of the relevant code and the illumination of the SRS warning light. In instances where the light does not work properly, the PCM will indicate a problem by initiating a series of audible tones that sound while driving.
To safely diagnose trouble codes stored in response to a problem with a vehicle's air bag system, a mechanic needs to use an advanced scanner and a digital multimeter with its output set at 10 mA or less. This is to prevent any damage to the air bag system, or even possibly the deployment of the air bag, while diagnosing the issue. In addition to these safety precautions, the mechanic should also perform the following diagnostic steps:
A common mistake made with a B1992 trouble code is for a mechanic to overlook simple fixes, such as a loose connection or poorly charged battery, and to replace more expensive components. The result is the problem remains and the code returns.
A B1992 trouble code is very serious as it can affect the safety of the vehicle occupants. As such, a vehicle owner should have a mechanic diagnose and fix the trouble code as soon as possible to prevent injury or death from an accident.
To repair and clear a B1992 trouble code, a mechanic needs to perform the following:
When diagnosing a vehicle's air bag system, it is important that the mechanic disconnect both battery cables first to prevent accidental deployment of the air bag. In addition, the mechanic should wait at least three minutes before proceeding after disconnecting the battery cables. During this three-minute time span, it is still possible for the air bag and the seat belt pre-tensioner to deploy.
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.