Code Definition

B0105 (53) — Passenger first step airbag squib Circuit shorted

System: Body  |  Type: Generic (OBD-II Standard)  |  Make: Toyota

About B0105

B0105 is a generic (obd-ii standard) body diagnostic trouble code recorded for Toyota vehicles. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B0105 is stored, the module has detected a short-circuit (voltage pulled to ground or to supply) in the monitored circuit.

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.

Because B0105 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

DTC B0105:53 is a Toyota body code that sets when the SRS ECU, also called the airbag sensor assembly, detects a short to ground or short to voltage in the passenger first stage airbag squib circuit. The squib is the electrically fired igniter inside the passenger airbag module, and the SRS ECU continuously monitors the firing loop resistance and its voltage so it can fire the airbag correctly in a frontal crash. This code stores when the circuit reads a short, most often from a chafed or pinched harness, damaged wiring behind the dashboard, or contamination in a connector, which can compromis...

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