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B1937 is a diagnostic trouble code (DTC) for "Air Bag Passenger Pressure Switch Circuit". 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.
The B1937 code is manufacturer-specific body code related to air bags. In this case, it means that the engine control module (ECM) has detected a fault with the passenger-side air bag.
A code B1937 will be stored when the ECM has detected an open voltage signal from the passenger-side air bag pressure switch.
Several problems may cause a B1937 code including:
Symptoms of a B1937 code may include:
A mechanic may use several methods to diagnose a B1937 trouble code, including:
Detection conditions are for understanding the DTC outline before performing an inspection. Performing an inspection according to only the detection conditions may cause injury due to an operating error, or damage the system. When performing an inspection, it is recommended to always follow the inspection procedure.
Because a vehicle’s safe driving operation can be impacted due to faults that store a B1937 code, this code is considered a potentially serious code. When this code appears, it is recommended to immediately take your vehicle to your local service center or mechanic for repair and diagnosis.
Several repairs can fix a B1937 trouble code and include:
Clock spring repair or replacement
Replace damaged or defective wiring harness between SAS control module and clock spring
Passenger-side airbag module repair or replacement
Passenger-side air bag pressure switch repair or replacement
SAS control module repair or replacement
Handling the air bag system components improperly can accidentally deploy the air bag modules and pre-tensioner seat belts, which can seriously injure you and those around you. Always be sure to read the service warnings and cautions before handling the air bag system components. Anything related to air bag repairs can be both difficult and dangerous, and is often best left to professionals for diagnosis and repair. If making any repairs at home, take care with the air bags when removed from the vehicle.
In addition, a technical service bulletin (TSB) may be related to the B1937 trouble code, so it is always recommended to check and see what bulletins may be associated with a particular code prior to diagnosis and repair.
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.