Code Definition

B2496 — ANTI THEFT HORN OUTPUT CIRCUIT Short to Gnd

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

About B2496

B2496 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 B2496 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 B2496 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 Anti Theft Horn is a dedicated alarm horn driven by the Body Control Module (BCM) as part of the vehicle security system, sounding when the alarm is triggered to deter intruders and alert bystanders. DTC B2496 is set when the BCM detects a short to ground condition on the Anti Theft Horn output circuit, meaning the control wire has an abnormally low resistance path to chassis ground. The BCM typically monitors current flow and feedback voltage on this output; when current flows at the wrong time, or excessive current flows when the horn is commanded on, the BCM disables the driver to prote...

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