Code Definition

B2479 — Brake Park Switch Circuit Short to Ground

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

About B2479

B2479 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 B2479 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 B2479 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 Body Control Module (BCM) or instrument cluster monitors the parking brake switch, also referred to as the brake park switch, which signals when the parking brake is applied. The switch is mounted on the parking brake lever, foot operated pedal mechanism, or electronic parking brake actuator and provides a ground signal to the BCM when the brake is set. This signal is used to illuminate the brake warning lamp on the cluster, enable shift interlock release on some vehicles, and inform other control modules of brake state. DTC B2479 sets when the BCM detects that the brake park switch signal...

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