B1943 OBD-II Code: Ground Shorted Connection with the Airbag Crash Sensor #1

What is the definition of code B1943?

When the code B1943 appears, then that means that voltage discrepancies are detected by the vehicle’s onboard diagnostic system. This indicates that there’s a short-to-ground connection related to the airbag circuit. The vehicle diagnostic system will also register this as a trouble code.

What does it mean when the code B1943 appears?

The airbag systems that are equipped in your vehicle are designed by the manufacturers to have a self-diagnostic mechanism. When the code B1943 appears, then the self-diagnostic mechanism is detecting a voltage difference that is far from the normal specification. It will also register the trouble code so you can try to fix the problem.

The possible causes for the appearance of code B1943

• The crash sensor #1 is experiencing a short circuit.
• The impact sensor located on the left front side of the vehicle has an open circuit.
• Your vehicles are showing other symptoms that might be related to code B1943.
• Your dashboard monitor shows a flashing symbol of airbag.

How should my mechanics diagnose the cause of code B1943?

• The mechanic should use a code reader that is built with a good quality. Using the scanner, they will be able to check any trouble codes that are related to airbags. Other trouble codes might be related to this code, including code B1941, B1942, B1944, and B1945.
• Your mechanic should use the wiring diagram from the car’s manufacturer to make it easier to diagnose and repair the problem.
• Using the scanner, they can check the trouble codes by connecting the scanner while the ignition is turned on and the headlamp is turned off.
• They should also check the condition of the impact sensor that is located on the right front side of the vehicle. The aspects that should be checked include the connectors, the wirings, and the possible deposits of any dirt or corrosion. Performing a wiggle test can also determine if the impact sensor is already damaged or not.
• Mechanics can check the resistance on terminals by disconnecting the airbag system beforehand.
• If the scanner shows a resistance number lower than 2 ohms, the diagnostic monitor should be replaced.
• But if the resistance number is higher than 2 ohms, they should disconnect the impact sensor that is located on the right front side from the harness.
• Mechanics should measure the resistance number between the yellow-white wires to the pink-orange wires.
• If the resistance number is higher than 2 ohms, then there might be an open circuit in the system.
• The impact sensor also might need to get replaced if the resistance number is higher than 2 ohms.
• The mechanics can try to clear the trouble codes and then drive the vehicle for a short time to see if the trouble codes persist.

Common mistakes in diagnosing the causes of code B1943

The most common mistake when mechanics are trying to diagnose the real problem of code B1943 is the lack of proper steps in diagnostics. This could usually result in them replacing working parts with new ones, which will drive up the cost of vehicle maintenance.

Should I worry if code B143 appears?

When code B1943 appears in the vehicle’s diagnostics, then you should get it fixed as soon as possible because it might cause the airbag not to deploy when the vehicle is experiencing an accident.

How can I repair trouble code B1943?

• Replace the crash sensor that is located on the left front side of the vehicle.
• Check the condition of wires and connectors and replace the ones that are damaged.
• Check the crash sensor for any short circuit and repair them promptly.

Additional comments related to the repair of code B1943

If you’re driving any Ford vehicle, then the system will try to flash an alert to you if there’s any problem with the airbag system. The flashing of light is usually an indication of a trouble code appearance. Normally, the light will flash four times and then followed by three more times after a short pause.

Repairing the problem that might come with the airbag system should only be done by professionals. An incorrect repair process might render serious injuries from your airbag system.