Code Definition

B0105 — Electronic frontal impact sensor signal error

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

About B0105

B0105 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.

When B0105 is stored, the module has detected a sensor-related fault — the reported value from the named sensor is out of spec.

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

Vehicles fitted with several electronic frontal impact sensors rely on each one to report frontal deceleration to the airbag control module (ACM), which combines the sensor inputs to decide when to deploy the front airbags and pretensioners. DTC B0105 sets when the ACM detects an abnormal, missing, or out of range signal from one of these frontal impact sensors, which can be caused by a failed sensor, an open, short, or high resistance condition in its circuit, a corroded connection, or an internal ACM fault. Because the sensors are mounted in the forward crush structure they are subject to mo...

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