Code Definition

B2134 — Brake Motor Warning lamp Circuit Short to Vbatt

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

About B2134

B2134 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 B2134 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 B2134 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

B2134 is set when the body control module (BCM) detects that the brake motor warning lamp output circuit is shorted to battery voltage. The brake motor warning lamp is typically associated with the electric parking brake or electrically actuated brake system and is normally driven by the BCM in response to brake system status or fault conditions. The BCM monitors the lamp drive circuit voltage and, when the line shows battery voltage even when the lamp is commanded off, it concludes the circuit is shorted to a power source somewhere between the BCM and the instrument cluster. With this code ac...

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