Code Definition

B0075 — Supplemental deployment loop Circuit shorted to earth or out of range - Circuit number 1

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

About B0075

B0075 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 B0075 is stored, the module has detected a short-circuit (voltage pulled to ground or to supply) in the monitored circuit; and a plausibility fault — the measured value is in the electrical range but is not consistent with expected operating behaviour.

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 B0075 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

The airbag control module (ACM) monitors each supplemental deployment loop for correct resistance and isolation from chassis ground so it can confirm the assigned squibs are ready to fire when commanded. DTC B0075 sets when the ACM detects that Supplemental Deployment Loop Number 1 is either shorted to earth or its measured resistance falls outside the acceptable window, meaning at least one loop conductor is contacting vehicle ground or the circuit is otherwise electrically compromised. Loop 1 is typically assigned to secondary devices such as a side airbag, curtain airbag, second stage infla...

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