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B1942 is a diagnostic trouble code (DTC) for "Airbag Crash Sensor #2 Feed/Return Circuit Open". 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 B1942 code means that the vehicle’s onboard diagnostic system has registered a trouble code after detecting a discrepancy in the voltages to two terminals in the airbag circuit.
Air bag sensors are designed to monitor the severity of a crash event. If a crash event is serious enough, the sensor will send a signal to the restraints control module (RCM), deploying the driver’s side air bag. Air bag systems are designed to perform self-diagnostics. Voltage at terminal #17 of the diagnostic monitor connector is supposed to stay at 9-11 volts. Circuit #617 is connected to Circuit #624, at the right front impact sensor. If voltage at terminal #2 drops below the voltage at terminal #17, a B1942 code will be set.
As with many codes, technicians often jump ahead on a B1942 code without doing a proper process of elimination and end up replacing parts unnecessarily. More often than not, a B1942 code is due to corroded or damaged wiring or connectors, or a failed driver’s side front airbag sensor.
A B1942 code can result in the airbag not deploying in a collision.
On many Ford vehicles, the airbag light is designed to flash in sequence, alerting the driver to a trouble code. In this instance, four flashes, followed by a pause, then followed by two more flashes, indicates trouble code B1942. Any airbag-related work might be best left up to a professional. Accidental deployment of the airbag can result in serious injury.
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 1-800-701-6220.