Code Definition

B1126 (1B) — Driver’s Side Airbag Deployment Control Circuit

System: Body  |  Type: Manufacturer-Specific  |  Make: Mazda

About B1126

B1126 is a manufacturer-specific body diagnostic trouble code recorded for Mazda vehicles. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B1126 is stored, the module has detected an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

Scanning & clearing: Body (B) codes are often stored in the body control module, airbag module, or climate module. A basic OBD-II tool usually will not read body codes — an enhanced or OEM-level scan tool is typically required.

B1126 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

The Supplemental Restraint System (SRS) control module continuously monitors the driver's side airbag squib deployment circuit for correct resistance and electrical integrity to ensure the airbag will fire correctly in a collision event. The squib is the small electrical igniter that initiates airbag inflation, and it sits at the end of the deployment loop accessed through the clockspring assembly in the steering column. DTC B1126:1B is logged when the SRS module detects an open circuit, short to ground, short to battery, or resistance outside the expected range (typically below 2 ohms or abov...

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