B1926 OBD-II Trouble Code: Air Bag Passenger Pressure Switch Circuit Failure

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Cost of diagnosing the B1926 code

B1926 is a diagnostic trouble code (DTC) for "Air Bag Passenger Pressure Switch Circuit Failure". 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.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$20.00
Toyota$20.00
BMW$20.00
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B1926 definition

A B1926 trouble code is related to a vehicle’s air bag pressure switch that will turn the passenger side supplemental restraint system (SRS) off and on depending on whether or not a person is sitting in the passenger seat.

What the B1926 code means

B1926 is a manufacturer specific OBD-II body code for a circuit failure for the passenger-side air bag pressure switch. This consists of a pressure sensor, typically mounted underneath the passenger seat, and wiring to connect the sensor to the air bag diagnostic monitor. When a failure is detected during the system’s start-up test, it will trigger a B1926 and likely disarm the passenger side air bag.

What causes the B1926 code?

The most common causes for a B1926 are:

  • Faulty passenger air bag pressure switch
  • Faulty air bag diagnostic monitor
  • Faulty battery voltage, resistance, or connection
  • Faulty charging system, i.e. faulty alternator

What are the symptoms of the B1926 code?

Symptoms should go unnoticed other than a check engine light and or air bag light on the dash. In the event of an accident, chances are high the passenger air bag will not deploy.

How does a mechanic diagnose the B1926 code?

Using a digital volt meter, your mechanic will test the passenger side air bag pressure sensor before determining it needs to be replaced. While chances are high a new sensor will fix the issue, your mechanic may need to continue testing the air bag diagnostic monitor circuit for any damaged wiring or grounds.

Common mistakes when diagnosing the B1926 code

Some B1926 codes can be caused by intermittent wiring faults instead of the pressure switch itself. This makes simple tests of the air bag circuit cost effective.

How serious is the B1926 code?

If a B1926 is present, chances are high your passenger air bag will be disabled. This makes repairs important to ensure the safety of occupants.

What repairs can fix the B1926 code?

The most common repairs for a B1926 are as follows:

Additional comments for consideration regarding the B1926 code

A B1926 is specific to Ford, Mercury, Lincoln, and Mazda vehicles. Any work that needs to be conducted on a vehicle’s SRS should be handled by a trained professional. The air bag could unexpectedly deploy while working to fix a B1926

Need help with a B1926 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.

B1926
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Al

21 years of experience
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Al
21 years of experience
Nissan Pathfinder - Check Engine Light is on - Atlanta, Georgia
Al, was cool and very knowledgeable. Being direct and upfront always works. Al, is a credit to the company.

Xavier

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Xavier
10 years of experience
Chevrolet Equinox - Check Engine Light is on - Frisco, Texas
Xavier was GREAT!!! He made sure that I understood everything that he did to my vehicle and answered all my questions. Very thorough and even worked thru the light rain that we had. When I have to use this service again, I hope to be able to request him!

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14 years of experience
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Luis
14 years of experience
Kia Sorento - Check Engine Light is on - Las Vegas, Nevada
Luis did an excellent job in determining that this was a warranty issue on bad parts. He has integrity and is good at what he does. I would highly recommend him for any auto repairs that come up.

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36 years of experience
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Reginald
36 years of experience
BMW 325i - Check Engine Light is on - Los Angeles, California
Reginald was incredibly helpful in helping me to diagnose several issues in my car, as well as repair issues to help me pass a break and light test. He even went so far as to come to the brake and light testing location so that he could ensure that the car passed and be there if anything else needed to be fixed on the spot. Absolutely would recommend him to anyone who is looking for an honest and knowledgeable mechanic!


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