Code Definition

B2587 — Passenger Seat Occupant Detection Circuit Short To Battery

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

About B2587

B2587 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 B2587 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 B2587 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 Passenger Occupant Detection System uses a sensor or sensor mat in the passenger seat cushion to determine whether the seat is occupied and, on classification systems, identify the occupant size to enable or suppress the front passenger airbag during a deployment event. DTC B2587 sets when the Occupant Detection Module or Restraints Control Module detects that the passenger occupant detection signal circuit is shorted to battery voltage, with the input held above the upper diagnostic threshold. The system applies a regulated reference to the sensor and expects the loaded voltage to sit ins...

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