Code Definition

B001A — Driver Frontal Stage 1 Deployment Control

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

About B001A

B001A is a generic (obd-ii standard) body diagnostic trouble code. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

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 B001A 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 B001A is set by the Supplemental Restraint System (SRS) control module when it detects a malfunction in the Stage 1 deployment circuit of the driver frontal airbag. Modern frontal airbags use dual stage inflators, and the control module monitors the resistance of each deployment loop, including the Stage 1 squib through the clockspring, to confirm it can fire that stage when needed. B001A sets when the module sees an open circuit, a short to ground, or a short to voltage in the Stage 1 loop, or a resistance outside the specified threshold during its continuous or key on self checks. When t...

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