Code Definition

B2231 — Airbag Passenger Circuit Short to Battery - Loop #2

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

About B2231

B2231 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 B2231 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 B2231 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 Supplemental Restraint System (SRS) control module continuously monitors the integrity of the passenger airbag deployment loops to confirm they remain ready to fire and have no electrical faults. DTC B2231 sets when the SRS module detects that the second deployment loop (Loop #2) of the passenger front airbag is shorted to battery voltage, meaning the squib circuit has an unintended path to a positive supply. This condition can cause uncommanded squib heating or, in worst case, an inadvertent deployment, and it always prevents correct controlled firing in a real crash. Loop #2 corresponds ...

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