Code Definition

B2133 — Brake Motor Warning lamp Circuit Failure

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

About B2133

B2133 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 B2133 is stored, the module has detected an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

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 B2133 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

B2133 is set when the body control module (BCM) detects a circuit fault on the brake motor warning lamp output. The brake motor warning lamp is typically associated with the electric parking brake or an electrically actuated brake system and is illuminated by the BCM when a fault condition or operational state requires driver notification. The BCM monitors the lamp circuit by checking for the expected current draw or feedback voltage when the lamp is commanded on or off. When the circuit shows an open condition with no current draw when commanded on, a short with excessive current draw, or an ...

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