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B1925 OBD-II Trouble Code: Air Bag Passenger Circuit Short To Battery

diagnostic check engine light

B1925 definition

A B1925 trouble code is related to a vehicle’s supplemental restraint system (SRS) and its connection between the battery and the passenger side air bag.

What the B1925 code means

B1925 is an OBD-II body code for a Ford vehicle, as all B1xxx codes are manufacturer specific. It pertains to a vehicle’s electrical circuit for the battery and the passenger side air bag. When the air bag circuit monitor conducts its self-test at start up, a B1925 will be triggered if a voltage or resistance issues is detected.

What causes the B1925 code?

The most common causes for a B1925 are:

  • Faulty battery connection
  • Faulty wiring from battery to passenger air bag
  • Faulty grounds
  • Faulty charging system

What are the symptoms of the B1925 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 air bag will not deploy.

How does a mechanic diagnose the B1925 code?

Many air bag codes can be caused by intermittent voltage or grounding issues caused by weak batteries or bad connections. Your mechanic will first ensure this is not the culprit before moving on to the air bag circuit. They will inspect the wiring from the battery to the passenger side air bag, repairing as necessary. While inspecting, they will ensure all grounds are cleaned and in working condition.

Common mistakes when diagnosing the B1925 code

Before digging into the air bag circuit wiring, it’s wise to ensure there isn’t a battery or charging system fault causing a B1925 instead.

How serious is the B1925 code?

Any air bag code will likely disarm the SRS itself, making it important to fix a B1925 as quickly as possible so your air bag will be functional in the event of an accident.

What repairs can fix the B1925 code?

The most common repairs for a B1925 are as follows:

Additional comments for consideration regarding the B1925 code

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 B1925

Need help with a B1925 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.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
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