What Does B1925 Mean?
This code indicates the airbag control module has detected an unwanted voltage (battery voltage) present on the passenger airbag deployment circuit when it should be at a lower control voltage. The airbag control module continuously monitors the passenger airbag squib circuit for proper resistance and voltage levels. A short to battery condition means the circuit has contacted a power source, creating a safety hazard where the airbag could deploy unexpectedly or fail to deploy during a collision.
Safety Warning
Vehicle is unsafe to drive as the airbag system is compromised and may deploy unexpectedly during normal driving or fail to deploy in a collision. The airbag warning light will be illuminated and the passenger airbag is disabled. Immediate professional repair is required before operating the vehicle.
Common Causes
45%
Damaged or chafed wiring harness under passenger seat or in door pillar causing short to power wire
25%
Faulty passenger airbag clock spring or slip ring assembly with internal short to power circuit
20%
Defective passenger airbag module with internal short circuit
10%
Corroded or damaged airbag connector terminals creating cross-circuit contact
Diagnostic Steps
1
Step 1: Perform visual inspection of passenger airbag wiring harness from module connector under dashboard through B-pillar to seat area, checking for pinched, chafed, or damaged wires that may contact power sources. Disconnect battery negative terminal and wait 10 minutes before handling airbag components.
2
Step 2: Using a digital multimeter set to resistance mode, disconnect the passenger airbag module connector and measure resistance between the airbag circuit pins and battery positive terminal. Reading should show infinite resistance (open circuit); any continuity indicates a short to battery.
3
Step 3: Disconnect the airbag control module connector and measure resistance on the passenger airbag circuit wires from the control module side to battery positive. This isolates whether the short is in the harness (continuity present) or in the airbag module itself (no continuity from harness side).
4
Step 4: Inspect all airbag connectors for corrosion, pushed-out pins, or foreign material causing cross-contact between circuits. Pay special attention to under-seat connectors that may have been disturbed during seat adjustments or aftermarket installations.
5
Step 5: If harness tests good, substitute-test with a known-good passenger airbag module (or use manufacturer-specific load tool simulator) to verify if original module has internal short. Clear codes and verify repair with live data monitoring of airbag circuit voltage while manipulating suspect wiring areas.
Estimated Repair Cost
$200 - $1,500
Parts + labor, varies by vehicle and location
This code indicates the airbag control module has detected an unwanted voltage (battery voltage) present on the passenger airbag deployment circuit when it should be at a lower control voltage. The airbag control module continuously monitors the passenger airbag squib circuit for proper resistance a...
The most common cause of B1925 (Air Bag Passenger Circuit Short To Battery) is: Damaged or chafed wiring harness under passenger seat or in door pillar causing short to power wire
Typical repair costs for B1925 range from $200 to $1,500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is unsafe to drive as the airbag system is compromised and may deploy unexpectedly during normal driving or fail to deploy in a collision. The airbag warning light will be illuminated and the passenger airbag is disabled. Immediate professional repair is required before operating the vehicle.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B1925 to identify the root cause.
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Quick Info
Category
Body
System
Supplemental Restraint System (SRS/Airbag)
Difficulty
Type
Manufacturer
Recommended Tools
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