Code Definition

B0101 (14) — Driver first step airbag squib Circuit open

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

About B0101

B0101 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 B0101 is stored, the module has detected an open (broken or disconnected) electrical path 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 B0101 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 B0101:14 is a Toyota body code indicating that the airbag control module (ACM) has detected an open circuit in the driver first stage airbag squib firing loop. The squib is the electrically fired igniter inside the steering wheel airbag module, and the ACM fires the first stage to begin driver airbag deployment in a frontal crash. The ACM constantly checks this loop for continuity through the clock spring, also called the spiral cable, so a disconnected airbag, a broken or corroded wire, a failed clock spring, or spread connector terminals will open the loop and set the code. When B0101:14...

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